Transcript
Page 1: Juniper Networks G10 CMTSJuniper Networks, Inc. 1194 North Mathilda Avenue Sunnyvale, CA 94089 USA 408-745-2000 Part Number: 530-008219-01, Revision 1 Juniper Networks Table of Contents

Juniper Networks, Inc.

1194 North Mathilda Avenue

Sunnyvale, CA 94089

USA

408-745-2000

www.juniper.net

Part Number: 530-008219-01, Revision 1

Juniper NetworksG10 CMTS

Installation and Operation

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Copyright © 2002, Juniper Networks, Inc. All rights reserved. Juniper Networks is registered in the U.S. Patent and Trademark Office and in other countries as a trademark of Juniper Networks, Inc. Broadband Cable Processor, ERX, ESP, G1, G10, G-series, Internet Processor, JUNOS, JUNOScript, M5, M10, M20, M40, M40e, M160, M-series, NMC-RX, SDX, ServiceGuard, T320, T640, T-series, UMC, and Unison are trademarks of Juniper Networks, Inc. All other trademarks, service marks, registered trademarks, or registered service marks are the property of their respective owners. All specifications are subject to change without notice.

Products made or sold by Juniper Networks (including the M5, M10, M20, M40, M40e, M160, and T320 routers, T640 routing node, and the JUNOS software) or components thereof might be covered by one or more of the following patents that are owned by or licensed to Juniper Networks: U.S. Patent Nos. 5,473,599, 5,905,725, 5,909,440, 6,333,650, 6,359,479, and 6,406,312.

G10 CMTS Installation and OperationCopyright © 2002, Juniper Networks, Inc.All rights reserved. Printed in USA.

Writer: Jerry IsaacEditor: Stella HackellIllustrations: Paul GilmanCovers and template design: Edmonds Design

Revision History6 December 2002—First Edition.

Juniper Networks assumes no responsibility for any inaccuracies in this document. Juniper Networks reserves the right to change, modify, transfer, or otherwise revise this publication without notice.

The Chassis Control Module and its corresponding G10 CMTS software perform encryption that is subject to U.S. Customs and Export regulations and shall not be exported, sold or transferred to a country outside the USA and Canada without an appropriate export license from the U.S. Government. The specific Regulations governing exports of encryption products are set forth in the Export Administration Regulations, 15 C.F.R. (Code of Federal Regulations), Parts 730-774.

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Table of Contents iii

Table of ContentsAbout This Manual

Purpose ...............................................................................................................xiiiOrganization ........................................................................................................xiiiDocument Conventions ....................................................................................... xiv

Notes, Cautions, and Warnings......................................................................xvG10 CMTS Document Set......................................................................................xv

Part 1Installation and Configuration

Chapter 1G10 CMTS Introduction ........................................................................................3

Overview ................................................................................................................3G10 CMTS Features and Functions .........................................................................4

Functional Overview........................................................................................4Broadband Cable Processor ASIC.....................................................................5

G10 CMTS Components ..........................................................................................5G10 CMTS Management .........................................................................................7G10 CMTS Hardware Overview...............................................................................7

Chapter 2Preparation for Installation.............................................................................15

Safety Precautions ................................................................................................15Notices..................................................................................................................18Power ...................................................................................................................18AC Power..............................................................................................................19DC Power .............................................................................................................19Environment.........................................................................................................20Mounting ..............................................................................................................20Tools and Equipment Required for Installation .....................................................21Characterization of Installation Site.......................................................................22Summary Checklist ...............................................................................................28Noise Measurement Methodology.........................................................................29

Average Upstream Noise Measurement .........................................................29Peak Upstream Noise Measurement ..............................................................30

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G10 CMTS Installation and Operationiv

Additional Characterization Tables .......................................................................31Verification of Shipping Cartons ...........................................................................35G10 CMTS Installation Checklist ...........................................................................36

Chapter 3Installation .................................................................................................................39

Ground the Chassis ...............................................................................................39Rack Mounting .....................................................................................................40Install Power Supplies...........................................................................................45Install a Power Transition Module.........................................................................49Install a DOCSIS Module .......................................................................................51Install an HFC Connector Module .........................................................................54Install a Chassis Control Module ...........................................................................56Install a CCM Access Module ................................................................................56Install a NIC Module..............................................................................................57Install a NIC Access Module ..................................................................................58Cable an HFC Connector Module ..........................................................................59

Cable the F-connector Ports...........................................................................59Cable a Chassis Control Module ............................................................................64Cable a NIC Module ..............................................................................................66

Link Aggregation ...........................................................................................66Cable a NIC Access Module...................................................................................69Attach a PC to the Chassis Control Module ...........................................................72Connect to Power Sources ....................................................................................73

AC Power ......................................................................................................73DC Power ......................................................................................................74

Chapter 4Configuration and Operation ..........................................................................77

Power On the G10 CMTS ......................................................................................77Power On and Configure the PC ...........................................................................84

Log In and Out of the G10 CMTS ...................................................................84Initial Configuration of the G10 CMTS...................................................................85

Slot Numbers.................................................................................................85Interfaces ......................................................................................................85Port ...............................................................................................................87Channel .........................................................................................................87Create Usernames and Passwords.................................................................88Configure Miscellaneous Parameters .............................................................88View and Save Running Configuration...........................................................88Configure a Downstream Channel .................................................................89Configure an Upstream Channel....................................................................90Configure Fast Ethernet Interfaces ................................................................91Configure Gigabit Ethernet Interfaces ............................................................92Configure Aggregate Links.............................................................................93Configure a Management Interface................................................................95Configure Redundant Chassis Control Modules .............................................96

Management Tasks...............................................................................................97Get Help ........................................................................................................97Define Usernames, Passwords, and Privileges...............................................97

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Table of Contents v

Set the Clock and Date ..................................................................................98Set the Hostname ..........................................................................................98Configure Banners .........................................................................................99

RF Tasks ...............................................................................................................99Add an Upstream Channel.............................................................................99Move an Upstream Channel.........................................................................100Configure an Upstream Modulation Profile ..................................................101Enable Upstream Multicast and Broadcast ...................................................104Create a Virtual Private Network..................................................................105Edit a CM Configuration File ........................................................................106

Convert to ASCII File ............................................................................111Edit the ASCII File.................................................................................113Create the Binary File ...........................................................................113Display the Binary File..........................................................................113

NSI Tasks ............................................................................................................114DHCP Server Parameters.............................................................................114

Subscriber Groups ................................................................................115DHCP Server Configurations.................................................................116DHCP-Bootrequest Broadcasting...........................................................116DHCP Provisioning Scenarios ...............................................................117

Shared Secret ..............................................................................................119SNMP Server Parameters.............................................................................120Domain Name Server Address.....................................................................120Authentication Server Configuration ............................................................121

Configure Juniper Networks-Specific RADIUS Attributes .......................121Configure Juniper Networks-Specific TACACS+ Attributes ...................122

File and Directory Management...................................................................123Configuration Management .........................................................................124Ping and Traceroute ....................................................................................124

Part 2Troubleshooting and Maintenance

Chapter 5RF Measurements ................................................................................................127

Downstream RF Measurement in CATV Mode ....................................................127Downstream RF Measurement in Spectrum Analyzer Mode ...............................129Upstream RF Measurement ................................................................................131

Chapter 6Troubleshooting ....................................................................................................135

Features for Troubleshooting ..............................................................................135Flap-List .......................................................................................................135

Use the Flap-List for Troubleshooting ...................................................140Local Event Log ...........................................................................................142Debug Commands.......................................................................................143Various CLI Commands ...............................................................................145ServiceGuard Management System..............................................................146

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G10 CMTS Installation and Operationvi

CMTS Power and Bootup Issues..........................................................................147CMTS Is Not Powering Up ...........................................................................147

CMTS Does Not Successfully Boot Up .................................................................147CMTS Does Not Boot Up With the Upgraded Software Release ...........................148CMTS Powers Down ...........................................................................................148DOCSIS Module Not Operating After Hot Insertion .............................................148Configuration Issues—Ideal HFC Plant................................................................149

CM Cannot Successfully Range....................................................................149CM Cannot Establish IP Connectivity...........................................................149CM Cannot Successfully Register .................................................................150CM Throughput is Slow................................................................................151CM is Dropped ............................................................................................155

HFC Plant-Related Issues ....................................................................................155CM Cannot Successfully Range....................................................................155CM Throughput is Slow................................................................................156

Chapter 7Maintenance and Upgrades...........................................................................157

Power Subsystem ...............................................................................................157Remove Power Supplies ..............................................................................158

Fan Trays............................................................................................................160Replace a Fan Tray......................................................................................160

Front Fan Trays....................................................................................161Rear Fan Tray ......................................................................................161

Module Removal.................................................................................................164Remove a DOCSIS Module ..........................................................................164Remove an HFC Connector Module.............................................................165Remove a Chassis Control Module...............................................................167Remove a CCM Access Module....................................................................167Remove a NIC Module.................................................................................168Remove a NIC Access Module .....................................................................168

Software Upgrade Procedure ..............................................................................169Download the Image ...................................................................................170

FTP Session From CMTS to Host ..........................................................170FTP Session From Host to CMTS ..........................................................170

Apply, Test, and Commit the Upgrade.........................................................171Replace the Primary Chassis Control Module......................................................172

Part 3Appendixes

Appendix AAgency Certifications .......................................................................................175

Safety...................................................................................................175EMC .....................................................................................................176Immunity .............................................................................................176

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Table of Contents vii

Appendix BHeadend Architecture .......................................................................................177

Appendix CG10 CMTS Local Log Events..........................................................................179

Appendix DField Replaceable Units ...................................................................................183

Appendix ERadio Frequency (RF) Specifications .....................................................185

Appendix FCoaxial Cable Requirements ........................................................................189

Appendix GGBIC Interface Specifications .....................................................................191

Appendix HEIA Channel Plans................................................................................................193

Part 4Index

IndexIndex.............................................................................................................................201

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List of Figures ix

List of FiguresList of Figures

Figure 1: Typical CMTS Location..........................................................................4Figure 2: G10 CMTS Data Flow ............................................................................6Figure 3: Front View of Fully-Configured Chassis.................................................8Figure 4: Front View of Partially-Configured Chassis............................................9Figure 5: Rear View of Fully-Configured Chassis ................................................10Figure 6: Rear View of Partially-Configured Chassis...........................................11Figure 7: Top View of Chassis Midplane ............................................................12Figure 8: Average Upstream Noise Measurement Example................................30Figure 9: Peak Upstream Noise Measurement Example.....................................31Figure 10: Air Flow Through Chassis....................................................................41Figure 11: Bottom of Chassis ...............................................................................42Figure 12: Lifting the Chassis...............................................................................43Figure 13: Rack-Mounted Chassis ........................................................................44Figure 14: Rack Fully Populated with Three G10 CMTS Chassis ...........................45Figure 15: Front and Rear Views of Midplane ......................................................47Figure 16: Power Supply Installation ...................................................................48Figure 17: Power Transition Module Installation..................................................50Figure 18: Air Management Module Removal ......................................................53Figure 19: DOCSIS Module Installation ................................................................54Figure 20: HFC Connector Module Installation ....................................................55Figure 21: Example of Allocation of Multiple Channels Per Port ..........................60Figure 22: HFC Connector Module Rear Panel .....................................................61Figure 23: Rear Coaxial Cable Connections ........................................................63Figure 24: Chassis Control Module and CCM Access Module Panels ....................65Figure 25: NIC Module and NIC Access Module Panels ........................................67Figure 26: NIC Module Cabling – Front View .......................................................68Figure 27: NIC Access Module Cable Connections ...............................................71Figure 28: AC Power Cord and Retainer Clip .......................................................74Figure 29: DC Power Transition Module ..............................................................75Figure 30: DOCSIS Module Front Panel ...............................................................80Figure 31: Chassis Control Module Front Panel....................................................82Figure 32: Downstream RF Signal (CATV Mode) ................................................128Figure 33: Downstream RF Signal (Spectrum Analyzer Mode) ...........................130Figure 34: Single Upstream Burst ......................................................................132Figure 35: Multiple Upstream Bursts..................................................................133Figure 36: Power Supply Removal ....................................................................159Figure 37: Front Fan Tray Replacement ...........................................................162Figure 38: Rear Fan Tray Replacement .............................................................163Figure 39: DOCSIS Module Removal .................................................................165Figure 40: HFC Connector Module Removal .....................................................166Figure 41: Headend Architecture .......................................................................178

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List of Figures

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G10 CMTS Installation and Operationx

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List of Tables xi

List of TablesList of Tables

Table 1: Power Supply Specifications ...............................................................19Table 2: G10 CMTS Environmental Specifications ............................................20Table 3: RF Plant/HFC Environment Characterization ......................................22Table 4: Existing DOCSIS Service Characterization...........................................23Table 5: Upstream CMTS Parameter Characterization ......................................24Table 6: Downstream CMTS Parameter Characterization .................................26Table 7: Upstream Frequency Spectrum Utilization..........................................27Table 8: Pre-Installation Requirement Summary Checklist ...............................28Table 9: Average Noise Spectrum Analyzer Settings .........................................29Table 10: Peak Noise Spectrum Analyzer Setup..................................................30Table 11: Existing DOCSIS Service Characterization...........................................32Table 12: Upstream CMTS Parameter Characterization ......................................33Table 13: DownstreamCMTS Parameter Characterization .................................35Table 14: G10 CMTS Installation Checklist..........................................................36Table 15: Power Supply Requirements...............................................................51Table 16: NIC Access Module Wiring Plan ..........................................................72Table 17: Power Supply LEDs.............................................................................78Table 18: DOCSIS Module LED Status.................................................................79Table 19: Chassis Control Module LED Status.....................................................81Table 20: NIC Module LED Status .......................................................................83Table 21: NIC Access Module LED Status............................................................83Table 22: Cable Interface to Ethernet Port Association .......................................86Table 23: Downstream Channel Assignment ......................................................86Table 24: Upstream Channel Assignment (8-Channel DOCSIS Module) ..............86Table 25: Upstream Channel Assignment (16-Channel DOCSIS Module) ............87Table 26: Downstream Channel Parameter Ranges............................................89Table 27: Upstream Channel Parameter Ranges.................................................90Table 28: Interval Usage Codes ........................................................................101Table 29: Upstream Modulation Profile Parameters .........................................101Table 30: Modulation Profiles 1, 2, and 3 .........................................................102Table 31: Modulation Profile Interval Parameters.............................................103Table 32: CM Configuration File TLV Type Names............................................107Table 33: Juniper Networks–Specific RADIUS Attributes ..................................121Table 34: Flap-list Sort Parameter ....................................................................136Table 35: Flap-list Statistics ..............................................................................138Table 36: Flap-list Thresholds ...........................................................................139Table 37: Flap-list Association to Potential Issues .............................................140Table 38: Local Event Log Headings Displayed.................................................142Table 39: Event-defining Debug Command Parameters ...................................144Table 40: G10 CMTS Local Log Events..............................................................179Table 41: Downstream RF Channel Transmission Characteristics ....................185Table 42: Upstream RF Channel Transmission Characteristics .........................186Table 43: Downstream RF Signal Output Characteristics ..................................186Table 44: DOCSIS Downstream Channel Rates and Spacing ............................187

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List of Tables

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G10 CMTS Installation and Operationxii

Table 45: DOCSIS Maximum Upstream Channel Rates and Widths..................187Table 46: Coaxial Cable Requirements .............................................................189Table 47: Single Mode, Long Range GBIC Specifications...................................191Table 48: Single Mode, Midrange GBIC Specifications ......................................191Table 49: Multi-Mode GBIC Specifications.........................................................192Table 50: 1000BT GBIC Specifications..............................................................192Table 51: EIA Channel Plan ..............................................................................193

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About This Manual xiii

About This Manual

This section describes important information about the design of this document.

Purpose

The purpose of this document, G10 CMTS Installation and Operation, is to provide the procedures required to properly install, configure, operate, troubleshoot, and maintain the G10 Cable Modem Termination System (CMTS).

This document is for the technicians and engineers who operate and maintain the G10 CMTS.

Organization

G10 CMTS Installation and Operation is organized as follows:

! Chapter 1, “G10 CMTS Introduction” – Provides a G10 CMTS functional and hardware overview.

! Chapter 2, “Preparation for Installation” – Provides the procedures that must be followed in preparation for the installation of the G10 CMTS in the headend.

! Chapter 3, “Installation” – Describes the complete installation procedure for the G10 CMTS.

! Chapter 4, “Configuration and Operation” – Describes the initial configuration procedure for the G10 CMTS, and additional procedures used to perform various operational tasks.

! Chapter 5, “RF Measurements” – Provides the procedures for measuring the downstream and upstream RF signals of a DOCSIS Module using a spectrum analyzer.

! Chapter 6, “Troubleshooting” – Identifies common issues associated with the operation and configuration of the G10 CMTS, the HFC plant, and CM provisioning, along with recommendations for troubleshooting and resolving these issues.

! Chapter 7, “Maintenance and Upgrades” – Provides the procedures required to maintain and upgrade the software and hardware components of the G10 CMTS.

! Appendix A, “Agency Certifications” – Listing of government agency certifications and approvals.

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Document Conventions

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G10 CMTS Installation and Operationxiv

! Appendix B, “Headend Architecture” – Provides an illustration of a typical cable headend architecture.

! Appendix C, “G10 CMTS Local Log Events” – Lists the Juniper Networks-specific local log events for the G10 CMTS.

! Appendix D, “Field Replaceable Units” – Provides a list of Field Replacement Units defined for the G10 CMTS.

! Appendix E, “Radio Frequency (RF) Specifications” – Provides DOCSIS RF specifications for reference purposes.

! Appendix F, “Coaxial Cable Requirements” – Provides coaxial requirements for usage with the HFC Connector Modules.

! Appendix G, “GBIC Interface Specifications” – Provides the specifications for the various GBIC interfaces.

! Appendix H, “EIA Channel Plans” – Provides the EIA (Electronic Industries Association) frequency plans.

Document Conventions

The following document conventions are used in this manual

General Conventions Italic font Denotes a) emphasis, b) first use of a new term, or c) a document title.

Screen Name font Denotes a) the on-screen name of a window, dialog box or field, or b) keys on a keyboard.

Software Conventions Computer font Font denotes code or messages displayed on-screen.

Computer Bold font Font denotes literal commands and parameters that you enter exactly as shown.

<Computer Italic> font Font denotes parameter values that require a user-defined input.

The value strings are enclosed in angle brackets <...>.

[parameter] Square brackets denote optional parameters.

{parameter} Braces denote required parameters.

| Vertical bars separate parameters in a group from which you must choose only one.

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About This Manual xv

Document Conventions

Notes, Cautions, and Warnings

G10 CMTS Document Set

! G10 CMTS Installation and Operation

! G10 CMTS Functional Description

! G-series CMTS CLI and SNMP Reference

A note indicates information that might be helpful in a particular situation, or information that might otherwise be overlooked.

A caution indicates a situation that requires careful attention. Failure to observe a cautionary note could result in injury or discomfort to yourself, or serious damage to the product.

A warning is intended to alert the user of the presence of uninsulated dangerous voltage within the product’s enclosure that may present a risk of electric shock.

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Document Conventions

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G10 CMTS Installation and Operationxvi

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1

Part 1Installation and Configuration

! G10 CMTS Introduction on page 3

! Preparation for Installation on page 15

! Installation on page 39

! Configuration and Operation on page 77

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G10 CMTS Installation and Operation2

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G10 CMTS Introduction 3

Chapter 1G10 CMTS Introduction

Overview

This chapter provides an introduction to the G10 Cable Modem Termination System.

The G10 CMTS manages Internet data and voice. It functions as the interface between the service networks—Internet, public switched telephone network (PSTN)—and the hybrid fiber/coax (HFC) network of subscribers, as shown in Figure 1 on page 4. This is the “last mile” of broadband service, with the CMTS typically located in the cable headend or distribution hub. It is targeted at the following data and voice aggregation applications:

! Large CATV Hub Sites — DOCSIS multi-service, residential and commercial IP network access over HFC networks maintained by cable television (CATV) multiple service operators (MSOs) needing enhanced integrated data, voice, and video in large metropolitan areas.

! Small CATV Hub Sites — Smaller hub sites aggregated over metropolitan fiber rings supporting Gigabit Ethernet.

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G10 CMTS Features and Functions

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G10 CMTS Installation and Operation4

Figure 1: Typical CMTS Location

G10 CMTS Features and Functions

The G10 CMTS provides true multi-service support, including the ability to simultaneously support DOCSIS IP services and VoIP services.

Functional Overview

The G10 CMTS is usually connected directly to a Gigabit-class core router that is part of an MSO’s metropolitan core network. It receives network side packet streams originating from the Internet, Media Gateways or video servers, then processes them into DOCSIS-compatible digital signals (MPEG) that are modulated onto an RF carrier for transmission downstream over the HFC network to the subscribers’ cable modems.

Upstream signals consist of protocol data units (PDUs) in data bursts from the cable modems. The G10 CMTS uses advanced scheduling algorithms to optimize the timing of these transmissions. The packets are processed to recover the payload data then routed, as IP packets, to the appropriate destinations through the network side interface.

The G10 CMTS’s high capacity of up to 32 downstream and 128 upstream channels, and other innovative features, are accomplished by the Broadband Cable Processor ASIC (application-specific integrated circuit).

Cable Headendor

Distribution HubInternet

Backbone

PSTN

Servers

NetworkManagement

Switch/Router CMTS

Subscribers

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G10 CMTS Introduction

G10 CMTS Components

5

Broadband Cable Processor ASIC

The Broadband Cable Processor ASIC provides all-digital processing of the return path. This, plus advanced noise cancellation and equalization algorithms, enables modulation rates beyond QPSK and allows traditionally problematic frequency ranges of the upstream spectrum to be utilized. All-digital processing also accommodates full spectrum analysis by capturing statistics of the upstream band in real time.

The Broadband Cable Processor ASIC incorporates key DOCSIS MAC (media access control) functions such as concatenation, fragmentation, encryption, and decryption. Accelerating these functions in hardware provides a high-performance, scalable CMTS solution that can process thousands of simultaneous DOCSIS service flows.

Advanced timing and digital signal processing algorithms allow more efficient use of the RF spectrum resulting in increased channel capacity.

G10 CMTS Components

The primary modules of the G10 CMTS are described below, arranged in the order of downstream data flow. See Figure 2 on page 6 for a graphical depiction of the data flow through the modules in a chassis. The chassis design employs front and rear modules that connect through a midplane. The objective of this design is to place the cable connections to the rear of the unit.

! NIC Module – Provides Ethernet switching functionality for upstream and downstream traffic, and for general-purpose switched Ethernet port usage. Houses two Gigabit Ethernet ports with GBICs (gigabit interface converter).

! NIC Access Module – Fans out the Ethernet signals to individual 10/100Base-T lines, which route to the HFC Connector Modules.

! DOCSIS Module – Performs all data processing functions. Processes IP data into DOCSIS packets. Converts and modulates data for RF transmission. Reverses these processes for upstream data.

! HFC Connector Module – Provides cable interfaces for the DOCSIS Module. Contains the Fast Ethernet connectors for network side data, and contains the F-connectors for the HFC cabling.

! Chassis Control Module – Provides management interface. Controls redundant protection functions and supplies software images to all DOCSIS Modules. Runs the SNMP agent and environmental monitoring.

! CCM Access Module – Provides rear-access to the Chassis Control Module.

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G10 CMTS Components

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G10 CMTS Installation and Operation6

Figure 2: G10 CMTS Data Flow

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G10 CMTS Introduction

G10 CMTS Management

7

G10 CMTS Management

The G10 CMTS supports the following system management applications and tools:

! CLI – The command-line interface provides the most comprehensive controls and is instrumental for installation, configuration, and upgrade tasks.

! NMS – The G10 CMTS can interact with SNMPv2c and SNMPv3-based Network Management Systems using DOCSIS 1.0 and DOCSIS 1.1 MIBs, and G10 CMTS enterprise MIBs. Events can conditionally be reported as SYSLOG messages or SNMP traps.

! ServiceGuard Management System – This optional advanced diagnostics application with a Java GUI provides a rendition of a spectrum analyzer for acquiring data on upstream transmission cable performance. It incorporates an integrated Impairment Identification tool that allows for unattended monitoring of statistics to characterize compromised performance to a potential cause (such as impulse or burst noise, narrow band ingress, or microreflections).

G10 CMTS Hardware Overview

This section provides an overview of the modules and various hardware components of the G10 CMTS, and where they reside within the chassis. This overview presents material that is specific to the installation and configuration of the G10 CMTS. For more details and specifications regarding these assemblies, see the G10 CMTS Functional Description.

Figure 3 on page 8 illustrates a front view of a fully-configured chassis. Figure 4 on page 9 illustrates a front view of a partially-configured chassis in which DOCSIS Modules, a Chassis Control Module (CCM), a Network Interface Card (NIC) Module, power supplies, air management modules, and power supply filler panels have been removed. Figure 5 on page 10 illustrates a rear view of a fully-configured chassis that uses the AC power transition module (see Figure 29 on page 75 for an illustration of the DC power transition module). Figure 6 on page 11 illustrates the rear view of the partially-configured chassis in which HFC Connector Modules, a CCM Access Module, a NIC Access Module, and air management panels have been removed. Figure 7 on page 12 provides a top view of the chassis midplane showing the slot enumeration and location of each module.

All the features of the chassis that are cited in these figures will be referenced in one or more procedures described in this document.

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G10 CMTS Hardware Overview

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G10 CMTS Installation and Operation8

Figure 3: Front View of Fully-Configured Chassis

Power

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G10 CMTS Introduction

G10 CMTS Hardware Overview

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Figure 4: Front View of Partially-Configured Chassis

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G10 CMTS Hardware Overview

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G10 CMTS Installation and Operation10

Figure 5: Rear View of Fully-Configured Chassis

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ChassisGround

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Module

CCMAccessModule

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G10 CMTS Introduction

G10 CMTS Hardware Overview

11

Figure 6: Rear View of Partially-Configured Chassis

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G10 CMTS Hardware Overview

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G10 CMTS Installation and Operation12

Figure 7: Top View of Chassis Midplane

DOCSIS Module

DOCSIS Module

DOCSIS Module

DOCSIS Module

DOCSIS Module

DOCSIS Module

DOCSIS Module

DOCSIS Module

NIC Module

Chassis Control Module

Chassis Control Module

HFC Connector Module

HFC Connector Module

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with logical slot numbers

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CCM Access Module

Module slots 1 through 6 reside in Domain A. Module slots 7, and 9 through 13 reside in Domain B.

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G10 CMTS Introduction

G10 CMTS Hardware Overview

13

Following is a brief explanation of each feature referenced in Figure 3 through Figure 6:

Front Features ! DOCSIS Module—Module that contains the Broadband Cable Processor ASIC and resides between the network side interface (NSI) and the hybrid fiber/coax (HFC) interface.

! NIC Module—Module that provides the Gigabit Ethernet interface and the Fast Ethernet switching functions for the network side interface.

! Chassis Control Module—Module that performs management and monitoring functions.

! Module Ejector Rail—Rail into which a module’s ejector tabs mate when a module is installed into a slot.

! ESD Strap Jack—Location in front of chassis where ESD ground strap can be plugged.

! Air Intake—Slotted openings along the front (removable) and sides of the chassis where air is drawn into the chassis for cooling the installed modules and power supplies.

! Air Intake Faceplate—Slotted removable panel that covers up the two front fan trays.

! Air Intake Faceplate Clip—Retainer clip used to mount the air intake faceplate.

! Front Fan Tray—Fan assembly that forces air upward through the front of the chassis.

! Front Fan Tray LED—LED that represents the status of the front fan tray.

! Power Supply Ejector Rail—Rail into which the power supply ejector tabs mate when a power supply is installed into a bay.

! Midplane—Passive electrical interconnecting device for all modules in the chassis.

! Air Management Module—Module that is installed into an unused module slot to redirect the air flow through the chassis and to reduce EMI emissions.

! Card Guide—Used to align a module or power supply while it is being inserted into its slot or bay, respectively.

! Power Supply—Converts AC or DC power supplied through the power transition modules into the DC voltages required by the modules.

! Power Supply Faceplate—Panel that runs along the top of the chassis that covers up the power supplies.

! Power Supply Faceplate Clip—Retainer clip used to mount the power supply faceplate.

! Power Supply Bay—Chassis bay in which a single hot-swappable power supply is inserted.

! Power Supply Filler Panel—Panel covering an empty power supply bay.

! Cable Channel—Channel that runs through the top of the chassis that is used to route the network cables from the rear of the chassis to the front of the chassis.

! Cable Guide—Guide in the front of the chassis used to route the network cables between the cable channel and the lower opening in the power supply faceplate.

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G10 CMTS Hardware Overview

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G10 CMTS Installation and Operation14

Rear Features ! HFC Connector Module—Module that functions as the DOCSIS Module’s physical access to both the NSI and the HFC interfaces on the rear of the chassis.

! NIC Access Module—Module that provides the network connections between the NIC Modules and the HFC Connector Modules.

! CCM Access Module—Module that provides Ethernet and serial connector access to the Chassis Control Module from the rear of the chassis.

! Rear Fan Tray—Fan assembly that forces air upward through the rear of the chassis.

! Rear Fan Tray LED—LED that represents the status of the rear fan tray.

! Air Management Panel—Panel that is installed over an unused module slot to redirect the air flow through the chassis and to reduce EMI emissions.

! Air Exhaust—Panel along the top and rear of the chassis where air is exhausted out of the chassis for cooling purposes.

! AC Power Transition Module—Rear module that distributes the externally-supplied AC power to the midplane.

! AC Power Receptacle—AC power cord receptacle on AC Power Transition Module.

! AC Power Switch—AC power ON/OFF switch that resides on the AC Power Transition Module.

! DC Power Transition Module—Rear module that distributes the externally-supplied DC power to the midplane.

! DC Power Receptacle—DC power cord terminal block on DC power transition module.

! Chassis Ground Nuts—Location where the earth ground connection to the chassis is made.

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Preparation for Installation 15

Chapter 2Preparation for Installation

This chapter provides the installation site requirements and the procedures that must be followed in preparation for the installation of the G10 CMTS in the headend.

The installation procedures described in this manual assume that the procedures and the checklist provided in this chapter have been successfully completed and approved by the user and Juniper Networks field engineers.

All the steps required to successfully install the G10 CMTS are summarized at the end of this chapter in Table 14 on page 36.

Safety Precautions

! Only trained and certified personnel should be involved in the installation of the CMTS.

! We recommend the use of a lift to install the G10 CMTS.

! Do not attempt to lift the G10 CMTS alone. If a lift is not used, we recommend at least three installers assist with lifting the system. This includes removal from the shipping carton, temporary or permanent placement on a flat surface, rack mounting, or lifting for any other purpose.

! Prior to lifting and moving the G10 CMTS, ensure that the path you will be taking is totally unobstructed.

! To avoid back injury when lifting the G10 CMTS, avoid bending your back to achieve lift leverage. Instead, keep your back in the upright position, and bend at the knees. Also avoid twisting your back while lifting.

! Always rack mount a system from the bottom up to maintain the lowest possible center of gravity of the entire rack with its equipment.

! Do not install any additional modules or power supplies to the G10 CMTS prior to mounting it in a rack. First mount the system into the rack with its original contents as shipped from Juniper Networks, then install additional components after the G10 CMTS is securely mounted to its rack.

During the preparation and installation of the G10 CMTS, it is very important to adhere to the precautions presented in this section to avoid physical injury due to lifting, moving, or rack mounting the CMTS.

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G10 CMTS Installation and Operation16

! Never attempt to move the G10 CMTS while any cables or power cords are still connected.

! Ensure that any loose articles of clothing are well clear of the fan trays prior to powering up the G10 CMTS.

! We recommend at least two installers be present when connecting the G10 CMTS to its power source.

! Remove all jewelry that can act as a conductor of electricity such as watches, rings, bracelets, and necklaces.

! Prior to making any power connections, locate the emergency power-off switch and ensure that the path between where the G10 CMTS will be installed and the power-off switch is unobstructed.

! Prior to making any power connections, survey the immediate area to ensure that no additional electrical safety hazards exist (such as ungrounded equipment or power cords, or damp, moist areas that could conduct electricity).

! Ensure that the power supply switches on the rear of the G10 CMTS are in the OFF (O) position prior to connecting any power cords.

! Use the factory-supplied AC power cords. These cords are grounded and appropriately rated for the G10 CMTS.

! Use the factory-supplied DC power cord ring lugs, and wire according to your local code for the DC power cord connection to the G10 CMTS.

! Attach all power cords to their appropriate terminals (AC or DC) in the rear of the G10 CMTS prior to plugging any power cord into its respective power source (AC or DC).

! Never apply excessive force when attaching a power cord to a terminal or power source if it does not readily mate with ease. Having to apply an unusual amount of force might indicate that electrical leads are bent and damaged, or that an improper connection is being attempted.

During the preparation and installation of the G10 CMTS, it is very important to adhere to the precautions presented in this section to avoid physical injury due to an electrical hazard.

High levels of electrical energy are distributed across the system midplane. Be careful not to contact the midplane connectors, or any component connected to the midplane, with any metallic object while hot-swapping or servicing components installed in the system.

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Preparation for Installation 17

! Ensure that the G10 CMTS chassis is properly grounded to earth prior to connecting any source of power. See “Ground the Chassis” on page 39 for more details.

! Before handling any G10 CMTS module, always wear an ESD ground strap that is connected to the ESD strap jack located on the front of the chassis.

! Leave all modules in the anti-static bags they are shipped in until you are ready to install the modules into the G10 CMTS.

! Handle all modules by their card edges or ejectors and avoid directly touching any component on a module.

! Ensure that all modules and power supplies are properly aligned and mated to their respective midplane connectors prior to powering up the G10 CMTS. Check that all captive retainer screws are securely tightened according to the torque specifications provided herein.

! Air management modules and air management panels must always be installed in empty slots while operating the G10 CMTS to ensure that proper air ventilation occurs throughout the chassis, and to reduce electromagnetic interference (EMI) emissions.

! All modules and power supplies are designed to smoothly slide into the G10 CMTS chassis using the card guides. Do not apply excessive force during the insertion of any assembly into the system. If resistance to insertion is encountered while installing any assembly, carefully remove it, realign its card edge with the chassis’ card guides, and reinsert it into the system.

! Do not operate the G10 CMTS without the front and rear fan trays that are shipped with the system.

! Ensure that the correct number of power supplies are installed for your configuration prior to powering up the G10 CMTS. See “Install a DOCSIS Module” on page 51 or consult with a Juniper Networks field engineer for power supply requirements.

! Do not apply torque to screws that is below or above the specifications provided herein.

During the preparation and installation of the G10 CMTS, it is very important to adhere to the precautions presented in this section to avoid damaging the G10 CMTS.

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Notices

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G10 CMTS Installation and Operation18

Notices

Power

The G10 CMTS can be configured with either AC or DC power supply modules. To support a fully-populated CMTS, the installation site must be able to source 1700 watts of input power. See Table 15 on page 51 for guidelines on the number of power supplies to install.

! This equipment is intended only for installation in a restricted access location within a building.

! This equipment is intended for indoor use only.

! This equipment does not have a direct copper connection to the outside plant.

! Removal of power supplies or cards will result in access to hazardous energy.

! Each power cord must be connected to an independent branch circuit.

! Product connected to two power sources. Disconnect both power sources before servicing.

Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries according to the instructions.

This is a Class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

The G10 CMTS chassis midplane is electrically partitioned into A and B domains. To support redundancy, each domain must be sourced by separate power supplies and circuit protection measures.

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Preparation for Installation

AC Power

19

Table 1 summarizes the input voltage and current ratings for a single power supply.

Table 1: Power Supply Specifications

AC Power

The G10 CMTS requires an AC power source that operates within a voltage and frequency range of 100 to 240 VAC and 47 to 63 Hz. In addition, appropriately sized circuit protection measures must be implemented to ensure compliance with electrical regulatory standards.

Use the factory-supplied power cords for AC power.

DC Power

The G10 CMTS requires a DC power source that operates within a voltage range of –36 to –75 VDC. Unlike the AC configuration, the DC power transition modules do not operate independently. Each DC power transition module supports the power supplies in both domains of the chassis. If one DC power transition module fails, all the current for the system must be supplied from a single power source. Therefore, within the United States, a 50-A circuit breaker (36 A maximum, plus margin) must be used with each of the two independent DC power sources connected to the CMTS. Outside the United States, each DC power source must have circuit breaker protection to account for a maximum current of 36 A, plus additional margin required by local regulations.

Ensure that all power distribution panel switches on the rear of the CMTS are in the OFF position prior to connecting any electrical power cords. Also ensure that the CMTS chassis is properly grounded to earth prior to connecting any source of power.

Power Supply Type Input Voltage Input Current Rating

Output Voltage

Maximum Output Current

AC100 to 240 VAC

47 to 63 Hz

1.4 A Nom (230V, 80% efficiency)

1.7 A Max (200V, 75% efficiency)

2.8 A Nom (115V, 80% efficiency)

3.7 A Max (90V, 75% efficiency)

+5.0 VDC 40.0 A (see note)

+3.3 VDC 40.0 A (see note)

+12.0 VDC 5.5 A

–12.0 VDC 0.5 A

DC –36 to –75 VDC5.4 A Nom (–48 VDC)

7.6 A Max (–36 VDC)

+5.0 VDC 40.0 A (see note)

+3.3 VDC 40.0 A (see note)

+12.0 VDC 5.5 A

–12.0 VDC 0.5 A

Note: The +5.0 VDC and +3.3 VDC outputs supply a combined maximum of 40.0 A in a load sharing manner.

AC power sources must use circuit breakers, rather than fuses, for current surge protection.

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Environment

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G10 CMTS Installation and Operation20

Use the factory-supplied DC power cord ring lugs, and wire according to your local code for the DC power cord connection to the G10 CMTS.

Environment

The installation site must meet the specifications provided in Table 2 to maintain the proper environmental conditions for the G10 CMTS.

Table 2: G10 CMTS Environmental Specifications

Mounting

The G10 CMTS is designed for mounting in a 19-inch EIA RS-310-C equipment rack or a 23-inch AT&T DATAPHONE equipment rack. Installation into non-standard racks can still be accomplished through the additional rail mounting bracket holes provided with the CMTS.

A cable organizer is recommended to assist with the routing of cables to and from the equipment rack. The cable organizer should be mounted after the CMTS is installed.

Parameter Condition Requirement

Temperature Ambient Operating 0° to +40°C (0° to +104°F)

Ambient Non-operating –35° to +60°C (–31° to +140°F)

Humidity Ambient Operating and Non-operating 10% to 90% (non-condensing)

Altitude Operating and Non-operating 0 to 3048 m (10,000 ft)

Vibration Operating 5 Hz to 200 Hz, at 1.0g (1.0 oct/min)

Non-operating 5 Hz to 200 Hz, at 1.0g (1.0 oct/min)

200 Hz to 500 Hz, at 2.0g (1.0 oct/min)

Systems should be rack mounted from the bottom up to maintain the lowest possible center of gravity of the entire rack with its equipment.

An equipment shelf or tray is recommended beneath the CMTS to support its weight. The shelf avoids any backward toppling of the rack or excess torque applied to the mounting brackets when the CMTS is installed.

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Preparation for Installation

Tools and Equipment Required for Installation

21

For thermal management, airflow enters into the lower front and sides of the CMTS chassis and ventilates through the upper rear. As a result, a clearance of 3 to 6 inches is required on each side of the CMTS. Additional equipment can be mounted flush on either the top or bottom of the CMTS without impacting system ventilation.

Proper clearance to the front and rear of the mounting rack is recommended so that the CMTS can be easily accessed during maintenance. The recommended clearance to the front and rear of the chassis is 3 feet and 2 feet, respectively.

Tools and Equipment Required for Installation

The following tools are needed to complete the G10 CMTS installation:

! M2.5 Phillips torque screwdriver

! M2.5 flathead torque screwdriver

! M3 Phillips torque screwdriver

! M5 Phillips torque screwdriver

! #10 Phillips torque screwdriver

! #10 flathead torque screwdriver

! #12 Phillips torque screwdriver

! 7/16 in. torque wrench

! 22-10 AWG crimper/cutter/stripper

In addition, the following supplies might be required:

! RF cables and adapters

! Ethernet cables with RJ-45 connectors

The following equipment is required to configure the G10 CMTS and verify that the RF system has been setup properly:

! PC with asynchronous terminal emulation

! RF spectrum analyzer

! RF power meter

Neighboring equipment must be positioned such that its ventilation exhaust does not feed into the CMTS air intakes.

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Characterization of Installation Site

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G10 CMTS Installation and Operation22

Characterization of Installation Site

Several parameters of the installation site need to be characterized prior to the installation of the CMTS. These parameters relate to specific aspects of the installation site system, HFC network connections, and CMTS downstream and upstream transmissions. The information collected will allow field engineers to verify that the installation site environment is compatible with the G10 CMTS. Table 3 is provided to collect information regarding the RF plant and HFC environment.

Table 3: RF Plant/HFC Environment Characterization

Table 4 is provided to collect information regarding the existing DOCSIS services supported by the installation site. If there are no existing DOCSIS services supported, skip Table 4 and proceed to subsequent tables. If more than two DOCSIS services exist, additional characterization tables can be found in “Additional Characterization Tables” on page 31.

Parameter Value

Plant architecture type ____ HFC ____ All Coax

Number of optical links within HFC

Distance between optical links within HFC ____ max ____ average

Amplifier cascade depth from node ____ max ____ average

Homes passed per node ____ max ____ average

Total homes passed by installation site

Node combining ratio per port ___:1 upstream ___:1 downstream

Average upstream noise measurement (see note below) ____ dB

Peak upstream noise measurement (see note below) ____ dB

Passive loss from upstream receiver to CMTS ____ dB

Maximum tap value used ____ dB

Maximum tap output level at highest frequency ____ dBmV

Maximum drop loss allowed from tap to home ____ dB

Method used for return path alignment

DOCSIS services offered? If yes, complete Table 4 on page 23. ____ yes ____ no

Upstream frequency spectrum utilization (complete Table 7 on page 27)

Note: A statistical sample of the total nodes terminated at the headend (~10%) should be taken for average and peak noise measurements per the methodology described in “Noise Measurement Methodology” on page 29.

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Characterization of Installation Site

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Table 4: Existing DOCSIS Service Characterization

Table 5 on page 24 and Table 6 on page 26 are provided to collect upstream and downstream characterization information, respectively, for a DOCSIS Module of the CMTS to be installed. If the desired CMTS configuration includes more than one DOCSIS Module, additional tables are available in “Additional Characterization Tables” on page 31.

Parameter Value

1st DOCSIS Service

Upstream RF bandwidth allocated ____ MHz (max) ____ MHz (min)

Upstream modulation type ____ QPSK ____ 16QAM

Upstream input level expected at CMTS ____ dBmV

FEC enabled? If yes, FEC level parameters (T and K)

____ yes ____ no____T ____ K

Upstream measured C/N ____ dB

Downstream RF bandwidth allocated ____ MHz (max) ____ MHz (min)

Downstream modulation type ____ 64QAM ____256QAM

Downstream output signal level (relative to analog video) ____ dB

Downstream measured C/N ____ dB (DOSCIS carrier)

____ dB (Analog video carrier)

Downstream interleave depth setting ___ (# of taps) ____(increments)

2nd DOCSIS Service

Upstream RF bandwidth allocated ____ MHz (max) ____ MHz (min)

Upstream modulation type ____ QPSK ____ 16QAM

Upstream input level expected at CMTS ____ dBmV

FEC enabled? If yes, FEC level parameters (T and K)

____ yes ____ no____ T ____ K

Upstream measured C/N ____ dB

Downstream RF bandwidth allocated ____ MHz (max) ____ MHz (min)

Downstream modulation type ____ 64QAM ____256QAM

Downstream output signal level (relative to analog video) ____ dB

Downstream measured C/N ____ dB (DOSCIS carrier)

____ dB (Analog video carrier)

Downstream interleave depth setting ___ (# of taps) ____(increments)

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Characterization of Installation Site

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G10 CMTS Installation and Operation24

Table 5: Upstream CMTS Parameter Characterization

Upstream Parameters Port 0 Port 1 Port 2 Port 3

DOCSIS Module #___

Node combining ratio per port

____ : 1 ____ : 1 ____ : 1 ____ : 1

Expected channels per port

Expected port input level ____ dBmV ____ dBmV ____ dBmV ____ dBmV

Modulation type(where applicable)

_ QPSK _ 16QAM (CH0)

_ QPSK _ 16QAM (CH1)

_ QPSK _ 16QAM (CH2)

_ QPSK _ 16QAM (CH3)

_ QPSK _ 16QAM (CH4)

_ QPSK _ 16QAM (CH5)

_ QPSK _ 16QAM (CH6)

_ QPSK _ 16QAM (CH7)

_ QPSK _ 16QAM (CH8)

_ QPSK _ 16QAM (CH9)

_ QPSK _ 16QAM (CH10)

_ QPSK _ 16QAM (CH11)

_ QPSK _ 16QAM (CH12)

_ QPSK _ 16QAM (CH13)

_ QPSK _ 16QAM (CH14)

_ QPSK _ 16QAM (CH15)

_ QPSK _ 16QAM (CH0)

_ QPSK _ 16QAM (CH1)

_ QPSK _ 16QAM (CH2)

_ QPSK _ 16QAM (CH3)

_ QPSK _ 16QAM (CH4)

_ QPSK _ 16QAM (CH5)

_ QPSK _ 16QAM (CH6)

_ QPSK _ 16QAM (CH7)

_ QPSK _ 16QAM (CH8)

_ QPSK _ 16QAM (CH9)

_ QPSK _ 16QAM (CH10)

_ QPSK _ 16QAM (CH11)

_ QPSK _ 16QAM (CH12)

_ QPSK _ 16QAM (CH13)

_ QPSK _ 16QAM (CH14)

_ QPSK _ 16QAM (CH15)

_ QPSK _ 16QAM (CH0)

_ QPSK _ 16QAM (CH1)

_ QPSK _ 16QAM (CH2)

_ QPSK _ 16QAM (CH3)

_ QPSK _ 16QAM (CH4)

_ QPSK _ 16QAM (CH5)

_ QPSK _ 16QAM (CH6)

_ QPSK _ 16QAM (CH7)

_ QPSK _ 16QAM (CH8)

_ QPSK _ 16QAM (CH9)

_ QPSK _ 16QAM (CH10)

_ QPSK _ 16QAM (CH11)

_ QPSK _ 16QAM (CH12)

_ QPSK _ 16QAM (CH13)

_ QPSK _ 16QAM (CH14)

_ QPSK _ 16QAM (CH15)

_ QPSK _ 16QAM (CH0)

_ QPSK _ 16QAM (CH1)

_ QPSK _ 16QAM (CH2)

_ QPSK _ 16QAM (CH3)

_ QPSK _ 16QAM (CH4)

_ QPSK _ 16QAM (CH5)

_ QPSK _ 16QAM (CH6)

_ QPSK _ 16QAM (CH7)

_ QPSK _ 16QAM (CH8)

_ QPSK _ 16QAM (CH9)

_ QPSK _ 16QAM (CH10)

_ QPSK _ 16QAM (CH11)

_ QPSK _ 16QAM (CH12)

_ QPSK _ 16QAM (CH13)

_ QPSK _ 16QAM (CH14)

_ QPSK _ 16QAM (CH15)

Channel width(where applicable)

Circle the applicable unit.

____ kHz/MHz (CH 0)

____ kHz/MHz (CH 1)

____ kHz/MHz (CH 2)

____ kHz/MHz (CH 3)

____ kHz/MHz (CH 4)

____ kHz/MHz (CH 5)

____ kHz/MHz (CH 6)

____ kHz/MHz (CH 7)

____ kHz/MHz (CH 8)

____ kHz/MHz (CH 9)

____ kHz/MHz (CH 10)

____ kHz/MHz (CH 11)

____ kHz/MHz (CH 12)

____ kHz/MHz (CH 13)

____ kHz/MHz (CH 14)

____ kHz/MHz (CH 15)

____ kHz/MHz (CH 0)

____ kHz/MHz (CH 1)

____ kHz/MHz (CH 2)

____ kHz/MHz (CH 3)

____ kHz/MHz (CH 4)

____ kHz/MHz (CH 5)

____ kHz/MHz (CH 6)

____ kHz/MHz (CH 7)

____ kHz/MHz (CH 8)

____ kHz/MHz (CH 9)

____ kHz/MHz (CH 10)

____ kHz/MHz (CH 11)

____ kHz/MHz (CH 12)

____ kHz/MHz (CH 13)

____ kHz/MHz (CH 14)

____ kHz/MHz (CH 15)

____ kHz/MHz (CH 0)

____ kHz/MHz (CH 1)

____ kHz/MHz (CH 2)

____ kHz/MHz (CH 3)

____ kHz/MHz (CH 4)

____ kHz/MHz (CH 5)

____ kHz/MHz (CH 6)

____ kHz/MHz (CH 7)

____ kHz/MHz (CH 8)

____ kHz/MHz (CH 9)

____ kHz/MHz (CH 10)

____ kHz/MHz (CH 11)

____ kHz/MHz (CH 12)

____ kHz/MHz (CH 13)

____ kHz/MHz (CH 14)

____ kHz/MHz (CH 15)

____ kHz/MHz (CH 0)

____ kHz/MHz (CH 1)

____ kHz/MHz (CH 2)

____ kHz/MHz (CH 3)

____ kHz/MHz (CH 4)

____ kHz/MHz (CH 5)

____ kHz/MHz (CH 6)

____ kHz/MHz (CH 7)

____ kHz/MHz (CH 8)

____ kHz/MHz (CH 9)

____ kHz/MHz (CH 10)

____ kHz/MHz (CH 11)

____ kHz/MHz (CH 12)

____ kHz/MHz (CH 13)

____ kHz/MHz (CH 14)

____ kHz/MHz (CH 15)

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Preparation for Installation

Characterization of Installation Site

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FEC enabled? If yes, FEC level parameters

_____ yes _____ no

____ T ____ K (CH 0)

____ T ____ K (CH 1)

____ T ____ K (CH 2)

____ T ____ K (CH 3)

____ T ____ K (CH 4)

____ T ____ K (CH 5)

____ T ____ K (CH 6)

____ T ____ K (CH 7)

____ T ____ K (CH 8)

____ T ____ K (CH 9)

____ T ____ K (CH 10)

____ T ____ K (CH 11)

____ T ____ K (CH 12)

____ T ____ K (CH 13)

____ T ____ K (CH 14)

____ T ____ K (CH 15)

_____ yes _____ no

____ T ____ K (CH 0)

____ T ____ K (CH 1)

____ T ____ K (CH 2)

____ T ____ K (CH 3)

____ T ____ K (CH 4)

____ T ____ K (CH 5)

____ T ____ K (CH 6)

____ T ____ K (CH 7)

____ T ____ K (CH 8)

____ T ____ K (CH 9)

____ T ____ K (CH 10)

____ T ____ K (CH 11)

____ T ____ K (CH 12)

____ T ____ K (CH 13)

____ T ____ K (CH 14)

____ T ____ K (CH 15)

_____ yes _____ no

____ T ____ K (CH 0)

____ T ____ K (CH 1)

____ T ____ K (CH 2)

____ T ____ K (CH 3)

____ T ____ K (CH 4)

____ T ____ K (CH 5)

____ T ____ K (CH 6)

____ T ____ K (CH 7)

____ T ____ K (CH 8)

____ T ____ K (CH 9)

____ T ____ K (CH 10)

____ T ____ K (CH 11)

____ T ____ K (CH 12)

____ T ____ K (CH 13)

____ T ____ K (CH 14)

____ T ____ K (CH 15)

_____ yes _____ no

____ T ____ K (CH 0)

____ T ____ K (CH 1)

____ T ____ K (CH 2)

____ T ____ K (CH 3)

____ T ____ K (CH 4)

____ T ____ K (CH 5)

____ T ____ K (CH 6)

____ T ____ K (CH 7)

____ T ____ K (CH 8)

____ T ____ K (CH 9)

____ T ____ K (CH 10)

____ T ____ K (CH 11)

____ T ____ K (CH 12)

____ T ____ K (CH 13)

____ T ____ K (CH 14)

____ T ____ K (CH 15)

Channel frequency

(where applicable)

____ MHz (CH 0)____ MHz (CH 1)____ MHz (CH 2)____ MHz (CH 3)____ MHz (CH 4)____ MHz (CH 5)____ MHz (CH 6)____ MHz (CH 7)____ MHz (CH 8)____ MHz (CH 9)____ MHz (CH 10)____ MHz (CH 11)____ MHz (CH 12)____ MHz (CH 13)____ MHz (CH 14)____ MHz (CH 15)

____ MHz (CH 0)____ MHz (CH 1)____ MHz (CH 2)____ MHz (CH 3)____ MHz (CH 4)____ MHz (CH 5)____ MHz (CH 6)____ MHz (CH 7)____ MHz (CH 8)____ MHz (CH 9)____ MHz (CH 10)____ MHz (CH 11)____ MHz (CH 12)____ MHz (CH 13)____ MHz (CH 14)____ MHz (CH 15)

____ MHz (CH 0)____ MHz (CH 1)____ MHz (CH 2)____ MHz (CH 3)____ MHz (CH 4)____ MHz (CH 5)____ MHz (CH 6)____ MHz (CH 7)____ MHz (CH 8)____ MHz (CH 9)____ MHz (CH 10)____ MHz (CH 11)____ MHz (CH 12)____ MHz (CH 13)____ MHz (CH 14)____ MHz (CH 15)

____ MHz (CH 0)____ MHz (CH 1)____ MHz (CH 2)____ MHz (CH 3)____ MHz (CH 4)____ MHz (CH 5)____ MHz (CH 6)____ MHz (CH 7)____ MHz (CH 8)____ MHz (CH 9)____ MHz (CH 10)____ MHz (CH 11)____ MHz (CH 12)____ MHz (CH 13)____ MHz (CH 14)____ MHz (CH 15)

Required channel input level

(where applicable)

____ dBmV (CH 0)____ dBmV (CH 1)____ dBmV (CH 2)____ dBmV (CH 3)____ dBmV (CH 4)____ dBmV (CH 5)____ dBmV (CH 6)____ dBmV (CH 7)____ dBmV (CH 8)____ dBmV (CH 9)____ dBmV (CH 10)____ dBmV (CH 11)____ dBmV (CH 12)____ dBmV (CH 13)____ dBmV (CH 14)____ dBmV (CH 15)

____ dBmV (CH 0)____ dBmV (CH 1)____ dBmV (CH 2)____ dBmV (CH 3)____ dBmV (CH 4)____ dBmV (CH 5)____ dBmV (CH 6)____ dBmV (CH 7)____ dBmV (CH 8)____ dBmV (CH 9)____ dBmV (CH 10)____ dBmV (CH 11)____ dBmV (CH 12)____ dBmV (CH 13)____ dBmV (CH 14)____ dBmV (CH 15)

____ dBmV (CH 0)____ dBmV (CH 1)____ dBmV (CH 2)____ dBmV (CH 3)____ dBmV (CH 4)____ dBmV (CH 5)____ dBmV (CH 6)____ dBmV (CH 7)____ dBmV (CH 8)____ dBmV (CH 9)____ dBmV (CH 10)____ dBmV (CH 11)____ dBmV (CH 12)____ dBmV (CH 13)____ dBmV (CH 14)____ dBmV (CH 15)

____ dBmV (CH 0)____ dBmV (CH 1)____ dBmV (CH 2)____ dBmV (CH 3)____ dBmV (CH 4)____ dBmV (CH 5)____ dBmV (CH 6)____ dBmV (CH 7)____ dBmV (CH 8)____ dBmV (CH 9)____ dBmV (CH 10)____ dBmV (CH 11)____ dBmV (CH 12)____ dBmV (CH 13)____ dBmV (CH 14)____ dBmV (CH 15)

Upstream Parameters Port 0 Port 1 Port 2 Port 3

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G10 CMTS Installation and Operation26

Table 6: Downstream CMTS Parameter Characterization

Downstream Parameters Port 0 Port 1 Port 2 Port 3

DOCSIS Module #___

Node combining ratio per port ____ : 1 ____ : 1 ____ : 1 ____ : 1

Channel frequency allocated ____ MHz ____ MHz ____ MHz ____ MHz

Modulation type _ 64QAM _256QAM _ 64QAM _256QAM _ 64QAM _256QAM _ 64QAM _256QAM

Output signal level (relative to analog video)

____ dB ____ dB ____ dB ____ dB

Required channel output level ____ dBmV ____ dBmV ____ dBmV ____ dBmV

Interleave depth setting ___ [I] (# of taps)___ [J] (increments)

___ [I] (# of taps)___ [J] (increments)

___ [I] (# of taps)___ [J] (increments)

___ [I] (# of taps)___ [J] (increments)

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Characterization of Installation Site

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Table 7: Upstream Frequency Spectrum Utilization

Frequency Description of Utilization Frequency Description of Utilization

5 – 6 MHz 24 – 25 MHz

6 – 7 MHz 25 – 26 MHz

7 – 8 MHz 26 – 27 MHz

8 – 9 MHz 27 – 28 MHz

9 – 10 MHz 28 – 29 MHz

10 – 11 MHz 29 – 30 MHz

11 – 12 MHz 30 – 31 MHz

12 – 13 MHz 31 – 32 MHz

13 – 14 MHz 32 – 33 MHz

14 – 15 MHz 33 – 34 MHz

15 – 16 MHz 34 – 35 MHz

16 – 17 MHz 35 – 36 MHz

17 – 18 MHz 36 – 37 MHz

18 – 19 MHz 37 – 38 MHz

19 – 20 MHz 38 – 39 MHz

20 – 21 MHz 39 – 40 MHz

21 – 22 MHz 40 – 41 MHz

22 – 23 MHz 41 – 42 MHz

23 – 24 MHz

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Summary Checklist

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G10 CMTS Installation and Operation28

Summary Checklist

Table 8 provides a summary checklist of the pre-installation requirements discussed in this document. This checklist should be completed and approved by Juniper Networks field engineers to ensure the installation site is properly prepared for installing the G10 CMTS.

Table 8: Pre-Installation Requirement Summary Checklist

Requirement Verified

Safety

Grounding straps provided for ESD protection

Compliance verified with all local and national regulatory requirements

Equipment to be positioned in a clear, dry, dust-free area

Power

AC Power

AC-input supply operates within range of 100 to 240 VAC and 47 to 63 Hz

Appropriate circuit protection in place for compliance with area electric regulations

Separate AC-input power supply sources for CMTS A and B domains

DC Power

DC-input supply operates within range of –36 to –75 VDC

Appropriate circuit protection in place for compliance with area electric regulations

Separate DC-input power supply sources for CMTS A and B domains

Environment

Ambient temperature conditions satisfied

Ambient humidity conditions satisfied

Altitude conditions satisfied

Vibration conditions satisfied

Mounting

19-inch rack, 23-inch rack, or appropriate non-standard rack or shelf available

Cable organizer available for mounting rack

Adequate access clearance to front, rear, and sides of CMTS

Hardware

Specified tools and supplies available

Test equipment available for installation and verifying RF setup

Installation Site

Characterization of RF Plant/HFC environment parameters completed

Characterization of existing DOCSIS services completed

Characterization of upstream CMTS parameters completed

Characterization of downstream CMTS parameters completed

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Preparation for Installation

Noise Measurement Methodology

29

Noise Measurement Methodology

This section describes the proper methodology for conducting average and peak upstream noise measurements. The procedures provided are designed to establish a consistent methodology for obtaining the requested information during the characterization of the installation site. The HP 8591C is the recommended spectrum analyzer to use for conducting these measurements.

Average Upstream Noise Measurement

This section defines a procedure for taking the average upstream noise measurements requested as part of the RF plant/HFC environment characterization. A statistical sample of total nodes terminated at the installation site (10% recommended) should be taken. Table 9 provides the appropriate setup configuration settings for the HP 8591C spectrum analyzer.

Table 9: Average Noise Spectrum Analyzer Settings

1. Connect the spectrum analyzer to the selected upstream signal at the upstream splitter or at the CMTS upstream port.

2. Configure the spectrum analyzer per the values defined in Table 9.

3. Start the measurement.

Upon completing the measurement, the analyzer display should resemble Figure 8 on page 30.

Setting Value

Start Frequency 2 MHz

Stop Frequency 45 MHz

Resolution Bandwidth 100 kHz

Video Bandwidth 30 kHz

Scale 5 dB/div

Internal Amplifier On

Attenuator 0 dB

Reference Level Offset -28 dB

Reference Level (see note below) -5 dBmV

Number of Averages 100

Note: This value might need to be adjusted for your particular test environment.

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Noise Measurement Methodology

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G10 CMTS Installation and Operation30

Figure 8: Average Upstream Noise Measurement Example

Peak Upstream Noise Measurement

This section defines a procedure for taking the peak upstream noise measurements requested as part of the RF plant/HFC environment characterization. A statistical sample of total nodes terminated at the installation site (10% recommended) should be taken. Table 10 provides the appropriate setup configuration settings for the HP 8591C spectrum analyzer.

Table 10: Peak Noise Spectrum Analyzer Setup

1. Connect the spectrum analyzer to the selected upstream signal at the upstream splitter or at the CMTS upstream port.

2. Configure the spectrum analyzer per the values defined in Table 10.

3. Start the measurement.

Upon completing the measurement, the analyzer display should resemble Figure 9 on page 31.

Setting Value

Start Frequency 2 MHz

Stop Frequency 45 MHz

Resolution Bandwidth 100 kHz

Video Bandwidth 30 kHz

Scale 5 dB/div

Internal Amplifier Off

Attenuator 0 dB

Reference Level of Headend 0 dBmV

Max Hold 1 minute

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Preparation for Installation

Additional Characterization Tables

31

Figure 9: Peak Upstream Noise Measurement Example

Additional Characterization Tables

If the installation site supports more than two DOCSIS services, the characterization of the additional services is to be captured in Table 11. In addition, if the desired CMTS configuration includes more than one DOCSIS Module, the additional tables, beginning on page 33, can be used as needed.

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Additional Characterization Tables

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Table 11: Existing DOCSIS Service Characterization

Parameter Value

____ DOCSIS Service

Upstream RF bandwidth allocated ____ MHz (max) ____ MHz (min)

Upstream modulation type ____ QPSK ____ 16QAM

Upstream input level expected at CMTS ____ dBmV

FEC enabled? If yes, FEC level parameters (T and K)

____ yes ____ no____T ____ K

Upstream measured C/N ____ dB

Downstream RF bandwidth allocated ____ MHz (max) ____ MHz (min)

Downstream modulation type ____ 64QAM ____256QAM

Downstream output signal level (relative to analog video) ____ dB

Downstream measured C/N ____ dB (DOSCIS carrier)

____ dB (Analog video carrier)

Downstream interleave depth setting ___ (# of taps) ____(increments)

____ DOCSIS Service

Upstream RF bandwidth allocated ____ MHz (max) ____ MHz (min)

Upstream modulation type ____ QPSK ____ 16QAM

Upstream input level expected at CMTS ____ dBmV

FEC enabled? If yes, FEC level parameters (T and K)

____ yes ____ no____ T ____ K

Upstream measured C/N ____ dB

Downstream RF bandwidth allocated ____ MHz (max) ____ MHz (min)

Downstream modulation type ____ 64QAM ____256QAM

Downstream output signal level (relative to analog video) ____ dB

Downstream measured C/N ____ dB (DOSCIS carrier)

____ dB (Analog video carrier)

Downstream interleave depth setting ___ (# of taps) ____(increments)

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Preparation for Installation

Additional Characterization Tables

33

Table 12: Upstream CMTS Parameter Characterization

Upstream Parameters Port 0 Port 1 Port 2 Port 3

DOCSIS Module #___

Node combining ratio per port

____ : 1 ____ : 1 ____ : 1 ____ : 1

Expected channels per port

Expected port input level ____ dBmV ____ dBmV ____ dBmV ____ dBmV

Modulation type(where applicable)

_ QPSK _ 16QAM (CH0)

_ QPSK _ 16QAM (CH1)

_ QPSK _ 16QAM (CH2)

_ QPSK _ 16QAM (CH3)

_ QPSK _ 16QAM (CH4)

_ QPSK _ 16QAM (CH5)

_ QPSK _ 16QAM (CH6)

_ QPSK _ 16QAM (CH7)

_ QPSK _ 16QAM (CH8)

_ QPSK _ 16QAM (CH9)

_ QPSK _ 16QAM (CH10)

_ QPSK _ 16QAM (CH11)

_ QPSK _ 16QAM (CH12)

_ QPSK _ 16QAM (CH13)

_ QPSK _ 16QAM (CH14)

_ QPSK _ 16QAM (CH15)

_ QPSK _ 16QAM (CH0)

_ QPSK _ 16QAM (CH1)

_ QPSK _ 16QAM (CH2)

_ QPSK _ 16QAM (CH3)

_ QPSK _ 16QAM (CH4)

_ QPSK _ 16QAM (CH5)

_ QPSK _ 16QAM (CH6)

_ QPSK _ 16QAM (CH7)

_ QPSK _ 16QAM (CH8)

_ QPSK _ 16QAM (CH9)

_ QPSK _ 16QAM (CH10)

_ QPSK _ 16QAM (CH11)

_ QPSK _ 16QAM (CH12)

_ QPSK _ 16QAM (CH13)

_ QPSK _ 16QAM (CH14)

_ QPSK _ 16QAM (CH15)

_ QPSK _ 16QAM (CH0)

_ QPSK _ 16QAM (CH1)

_ QPSK _ 16QAM (CH2)

_ QPSK _ 16QAM (CH3)

_ QPSK _ 16QAM (CH4)

_ QPSK _ 16QAM (CH5)

_ QPSK _ 16QAM (CH6)

_ QPSK _ 16QAM (CH7)

_ QPSK _ 16QAM (CH8)

_ QPSK _ 16QAM (CH9)

_ QPSK _ 16QAM (CH10)

_ QPSK _ 16QAM (CH11)

_ QPSK _ 16QAM (CH12)

_ QPSK _ 16QAM (CH13)

_ QPSK _ 16QAM (CH14)

_ QPSK _ 16QAM (CH15)

_ QPSK _ 16QAM (CH0)

_ QPSK _ 16QAM (CH1)

_ QPSK _ 16QAM (CH2)

_ QPSK _ 16QAM (CH3)

_ QPSK _ 16QAM (CH4)

_ QPSK _ 16QAM (CH5)

_ QPSK _ 16QAM (CH6)

_ QPSK _ 16QAM (CH7)

_ QPSK _ 16QAM (CH8)

_ QPSK _ 16QAM (CH9)

_ QPSK _ 16QAM (CH10)

_ QPSK _ 16QAM (CH11)

_ QPSK _ 16QAM (CH12)

_ QPSK _ 16QAM (CH13)

_ QPSK _ 16QAM (CH14)

_ QPSK _ 16QAM (CH15)

Channel width(where applicable)

Circle the applicable unit.

____ kHz/MHz (CH 0)

____ kHz/MHz (CH 1)

____ kHz/MHz (CH 2)

____ kHz/MHz (CH 3)

____ kHz/MHz (CH 4)

____ kHz/MHz (CH 5)

____ kHz/MHz (CH 6)

____ kHz/MHz (CH 7)

____ kHz/MHz (CH 8)

____ kHz/MHz (CH 9)

____ kHz/MHz (CH 10)

____ kHz/MHz (CH 11)

____ kHz/MHz (CH 12)

____ kHz/MHz (CH 13)

____ kHz/MHz (CH 14)

____ kHz/MHz (CH 15)

____ kHz/MHz (CH 0)

____ kHz/MHz (CH 1)

____ kHz/MHz (CH 2)

____ kHz/MHz (CH 3)

____ kHz/MHz (CH 4)

____ kHz/MHz (CH 5)

____ kHz/MHz (CH 6)

____ kHz/MHz (CH 7)

____ kHz/MHz (CH 8)

____ kHz/MHz (CH 9)

____ kHz/MHz (CH 10)

____ kHz/MHz (CH 11)

____ kHz/MHz (CH 12)

____ kHz/MHz (CH 13)

____ kHz/MHz (CH 14)

____ kHz/MHz (CH 15)

____ kHz/MHz (CH 0)

____ kHz/MHz (CH 1)

____ kHz/MHz (CH 2)

____ kHz/MHz (CH 3)

____ kHz/MHz (CH 4)

____ kHz/MHz (CH 5)

____ kHz/MHz (CH 6)

____ kHz/MHz (CH 7)

____ kHz/MHz (CH 8)

____ kHz/MHz (CH 9)

____ kHz/MHz (CH 10)

____ kHz/MHz (CH 11)

____ kHz/MHz (CH 12)

____ kHz/MHz (CH 13)

____ kHz/MHz (CH 14)

____ kHz/MHz (CH 15)

____ kHz/MHz (CH 0)

____ kHz/MHz (CH 1)

____ kHz/MHz (CH 2)

____ kHz/MHz (CH 3)

____ kHz/MHz (CH 4)

____ kHz/MHz (CH 5)

____ kHz/MHz (CH 6)

____ kHz/MHz (CH 7)

____ kHz/MHz (CH 8)

____ kHz/MHz (CH 9)

____ kHz/MHz (CH 10)

____ kHz/MHz (CH 11)

____ kHz/MHz (CH 12)

____ kHz/MHz (CH 13)

____ kHz/MHz (CH 14)

____ kHz/MHz (CH 15)

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Additional Characterization Tables

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G10 CMTS Installation and Operation34

FEC enabled? If yes, FEC level parameters

_____ yes _____ no

____ T ____ K (CH 0)

____ T ____ K (CH 1)

____ T ____ K (CH 2)

____ T ____ K (CH 3)

____ T ____ K (CH 4)

____ T ____ K (CH 5)

____ T ____ K (CH 6)

____ T ____ K (CH 7)

____ T ____ K (CH 8)

____ T ____ K (CH 9)

____ T ____ K (CH 10)

____ T ____ K (CH 11)

____ T ____ K (CH 12)

____ T ____ K (CH 13)

____ T ____ K (CH 14)

____ T ____ K (CH 15)

_____ yes _____ no

____ T ____ K (CH 0)

____ T ____ K (CH 1)

____ T ____ K (CH 2)

____ T ____ K (CH 3)

____ T ____ K (CH 4)

____ T ____ K (CH 5)

____ T ____ K (CH 6)

____ T ____ K (CH 7)

____ T ____ K (CH 8)

____ T ____ K (CH 9)

____ T ____ K (CH 10)

____ T ____ K (CH 11)

____ T ____ K (CH 12)

____ T ____ K (CH 13)

____ T ____ K (CH 14)

____ T ____ K (CH 15)

_____ yes _____ no

____ T ____ K (CH 0)

____ T ____ K (CH 1)

____ T ____ K (CH 2)

____ T ____ K (CH 3)

____ T ____ K (CH 4)

____ T ____ K (CH 5)

____ T ____ K (CH 6)

____ T ____ K (CH 7)

____ T ____ K (CH 8)

____ T ____ K (CH 9)

____ T ____ K (CH 10)

____ T ____ K (CH 11)

____ T ____ K (CH 12)

____ T ____ K (CH 13)

____ T ____ K (CH 14)

____ T ____ K (CH 15)

_____ yes _____ no

____ T ____ K (CH 0)

____ T ____ K (CH 1)

____ T ____ K (CH 2)

____ T ____ K (CH 3)

____ T ____ K (CH 4)

____ T ____ K (CH 5)

____ T ____ K (CH 6)

____ T ____ K (CH 7)

____ T ____ K (CH 8)

____ T ____ K (CH 9)

____ T ____ K (CH 10)

____ T ____ K (CH 11)

____ T ____ K (CH 12)

____ T ____ K (CH 13)

____ T ____ K (CH 14)

____ T ____ K (CH 15)

Channel frequency

(where applicable)

____ MHz (CH 0)____ MHz (CH 1)____ MHz (CH 2)____ MHz (CH 3)____ MHz (CH 4)____ MHz (CH 5)____ MHz (CH 6)____ MHz (CH 7)____ MHz (CH 8)____ MHz (CH 9)____ MHz (CH 10)____ MHz (CH 11)____ MHz (CH 12)____ MHz (CH 13)____ MHz (CH 14)____ MHz (CH 15)

____ MHz (CH 0)____ MHz (CH 1)____ MHz (CH 2)____ MHz (CH 3)____ MHz (CH 4)____ MHz (CH 5)____ MHz (CH 6)____ MHz (CH 7)____ MHz (CH 8)____ MHz (CH 9)____ MHz (CH 10)____ MHz (CH 11)____ MHz (CH 12)____ MHz (CH 13)____ MHz (CH 14)____ MHz (CH 15)

____ MHz (CH 0)____ MHz (CH 1)____ MHz (CH 2)____ MHz (CH 3)____ MHz (CH 4)____ MHz (CH 5)____ MHz (CH 6)____ MHz (CH 7)____ MHz (CH 8)____ MHz (CH 9)____ MHz (CH 10)____ MHz (CH 11)____ MHz (CH 12)____ MHz (CH 13)____ MHz (CH 14)____ MHz (CH 15)

____ MHz (CH 0)____ MHz (CH 1)____ MHz (CH 2)____ MHz (CH 3)____ MHz (CH 4)____ MHz (CH 5)____ MHz (CH 6)____ MHz (CH 7)____ MHz (CH 8)____ MHz (CH 9)____ MHz (CH 10)____ MHz (CH 11)____ MHz (CH 12)____ MHz (CH 13)____ MHz (CH 14)____ MHz (CH 15)

Required channel input level

(where applicable)

____ dBmV (CH 0)____ dBmV (CH 1)____ dBmV (CH 2)____ dBmV (CH 3)____ dBmV (CH 4)____ dBmV (CH 5)____ dBmV (CH 6)____ dBmV (CH 7)____ dBmV (CH 8)____ dBmV (CH 9)____ dBmV (CH 10)____ dBmV (CH 11)____ dBmV (CH 12)____ dBmV (CH 13)____ dBmV (CH 14)____ dBmV (CH 15)

____ dBmV (CH 0)____ dBmV (CH 1)____ dBmV (CH 2)____ dBmV (CH 3)____ dBmV (CH 4)____ dBmV (CH 5)____ dBmV (CH 6)____ dBmV (CH 7)____ dBmV (CH 8)____ dBmV (CH 9)____ dBmV (CH 10)____ dBmV (CH 11)____ dBmV (CH 12)____ dBmV (CH 13)____ dBmV (CH 14)____ dBmV (CH 15)

____ dBmV (CH 0)____ dBmV (CH 1)____ dBmV (CH 2)____ dBmV (CH 3)____ dBmV (CH 4)____ dBmV (CH 5)____ dBmV (CH 6)____ dBmV (CH 7)____ dBmV (CH 8)____ dBmV (CH 9)____ dBmV (CH 10)____ dBmV (CH 11)____ dBmV (CH 12)____ dBmV (CH 13)____ dBmV (CH 14)____ dBmV (CH 15)

____ dBmV (CH 0)____ dBmV (CH 1)____ dBmV (CH 2)____ dBmV (CH 3)____ dBmV (CH 4)____ dBmV (CH 5)____ dBmV (CH 6)____ dBmV (CH 7)____ dBmV (CH 8)____ dBmV (CH 9)____ dBmV (CH 10)____ dBmV (CH 11)____ dBmV (CH 12)____ dBmV (CH 13)____ dBmV (CH 14)____ dBmV (CH 15)

Upstream Parameters Port 0 Port 1 Port 2 Port 3

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Preparation for Installation

Verification of Shipping Cartons

35

Table 13: DownstreamCMTS Parameter Characterization

Verification of Shipping Cartons

Prior to beginning the installation of the G10 CMTS, it is important to verify that the contents of the shipping cartons are identical to the contents listed on the packing lists. In addition, a careful inspection of the shipped contents should be performed to ensure that they are not damaged in any manner. If any contents are missing or damaged, please report this to Juniper Networks customer support.

Following are the steps that are recommended to verify the contents of the shipping cartons match the packing list:

1. Carefully open the shipping cartons. Pay attention to any instructions printed on each shipping carton.

2. Remove all the contents of the shipping cartons. When lifting heavy contents, be sure to follow the safety precautions listed in “Safety Precautions” on page 15.

3. Verify that the contents of the shipping cartons are identical to the contents listed on the packing lists.

4. Verify that the correct number of power supplies are installed in the G10 CMTS chassis.

5. Open all accessory kits that are included in the shipment. Verify that the contents are identical to the contents listed on the accessory kit packing lists.

6. Install the power supply faceplate included in the shipment by aligning its four ball studs with the four power supply faceplate clips and pressing the faceplate towards the chassis until it snaps into place. If additional power supplies will be installed, this step can be deferred.

7. Install the air intake faceplate included in the shipment by aligning its four ball studs with the four air intake faceplate clips and pressing the faceplate towards the chassis until it snaps into place.

Downstream Parameters Port 0 Port 1 Port 2 Port 3

DOCSIS Module #___

Node combining ratio per port ____ : 1 ____ : 1 ____ : 1 ____ : 1

Channel frequency allocated ____ MHz ____ MHz ____ MHz ____ MHz

Modulation type _ 64QAM _256QAM _ 64QAM _256QAM _ 64QAM _256QAM _ 64QAM _256QAM

Output signal level (relative to analog video)

____ dB ____ dB ____ dB ____ dB

Required channel output level ____ dBmV ____ dBmV ____ dBmV ____ dBmV

Interleave depth setting ___ [I] (# of taps)___ [J] (increments)

___ [I] (# of taps)___ [J] (increments)

___ [I] (# of taps)___ [J] (increments)

___ [I] (# of taps)___ [J] (increments)

The power supply faceplate must always be installed prior to powering on the G10 CMTS to ensure that proper air ventilation occurs throughout the chassis.

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G10 CMTS Installation Checklist

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G10 CMTS Installation and Operation36

G10 CMTS Installation Checklist

Table 14 summarizes all the steps outlined in this document that are required to successfully install the G10 CMTS in the headend. We recommend that copies of this table be made and used to keep track of the status of each G10 CMTS being installed.

Table 14: G10 CMTS Installation Checklist

Step Page Number Completion Status

Preparation for Installation

Complete all checklists in “Preparation for Installation” page 15

Completely review G10 CMTS Installation and Operation, including the safety precautions —

Verify the contents of the shipping cartons

page 35

Verify the number of pre-installed modules and power supplies in the chassis is correct

Verify the contents of all accessory kits

Install the power supply faceplate and the air intake faceplate

Ground and Rack Mount the Chassis

Crimp the supplied two-ring lug connector to the earth ground strap page 39

Attach the earth ground strap to the chassis

Ensure proper ventilation clearance surrounding the G10 CMTS

page 40

Install an equipment shelf in the rack

If applicable, install the rack mounting brackets

Slide the chassis onto the shelf and mount it to the rack

Attach the earth ground strap to earth ground

Install Power Supplies

Remove the power supply faceplate

page 45

Determine the bay in which to install the power supply

Remove the power supply filler panel

Release the ejector, align to the card guides, insert the power supply, and close the ejector

Tighten the self-contained screws

Replace the power supply faceplate

Install a Power Transition Module

Slide the module along its guide rails into the bay

page 49Firmly press the module so that it mates with its midplane power connector and rests flush with the chassis

Tighten the four self-contained screws

Install a DOCSIS Module and an HFC Connector Module

Remove the air management module where the DOCSIS Module will be inserted

page 51

Release the ejectors, align to the card guides, insert the DOCSIS Module, and close the ejectors

Tighten the self-contained screws

Remove the air management panel where the HFC Connector Module will be inserted

Release the ejectors, align to the card guides, insert the HFC Connector Module, and close the ejectors

Tighten the self-contained screws

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Preparation for Installation

G10 CMTS Installation Checklist

37

Install a Chassis Control Module and a CCM Access Module

Remove the air management module where the Chassis Control Module will be inserted

page 56

Release the ejectors, align to the card guides, insert the Chassis Control Module, and close the ejectors

Tighten the self-contained screws

Remove the air management panel where the CCM Access Module will be inserted

Release the ejectors, align to the card guides, insert the CCM Access Module, and close the ejectors

Tighten the self-contained screws

Install a NIC Module and a NIC Access Module

Remove the air management module where the NIC Module will be inserted

page 57

Release the ejectors, align to the card guides, insert the NIC Module, and close the ejectors

Tighten the self-contained screws

Remove the air management panel where the NIC Access Module will be inserted

Release the ejectors, align to the card guides, insert the NIC Access Module, and close the ejectors

Tighten the self-contained screws

Cable an HFC Connector Module

Determine how the cable plant nodes will be connected to the downstream and upstream ports of the HFC Connector Module

page 59Connect each of the four downstream ports to its respective node

Connect each of the four upstream ports to its respective node

Dress all cables appropriately

Cable a NIC Module and a NIC Access Module

Thread the network cables through the cable channel from the rear of the chassis

page 66

Connect each of the two 1-Gigabit Ethernet network cables to the ports on the NIC Module

Connect the other ends of the network cables to their respective network equipment in the headend

Connect the RJ-21 end of the NIC Access Module cable into the NIC Access Module and tighten the cable retainer screws

Connect eight RJ-45 connectors of the NIC Access Module cable to a maximum of four DOCSIS Modules

Dress all cables appropriately

Cable a Chassis Control Module

Thread the Ethernet cable through the cable channel from the rear of the chassis

page 64

Connect the RJ-45 connector of the Ethernet cable to the 10/100BASE-T port on the Chassis Control Module (Eth0)

Connect the other end of the Ethernet cable to its respective network equipment in the headend

Attach a PC to the Chassis Control Module

Connect the serial cable to the COM port on the Chassis Control Module page 72

Connect the other end of the serial cable to the serial port on the PC

Step Page Number Completion Status

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G10 CMTS Installation Checklist

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G10 CMTS Installation and Operation38

Connect to Power Sources

Ensure that each power distribution rocker switch is OFF (AC only)

page 73Plug each power cord into the power receptacles (AC) or terminal blocks (DC)

Close the retainer clips around the power cords (AC) or secure the DC ring lugs to the terminal blocks (DC)

Plug the other ends of the power cords to their respective, independent power sources

Power On the G10 CMTS

Ensure that the power sources are on

page 77

Turn on the power switches on the power transition modules (AC only)

Check all power supply LEDs (power supply faceplate must be removed, then replaced)

Check front and rear fan tray LEDs

Check all DOCSIS Module LEDs

Check all Chassis Control Module LEDs

Check all NIC Module LEDs

Power On and Configure the PC

Power on the PC, launch the asynchronous terminal emulation application, and establish a direct serial connection with the Chassis Control Module page 84Check for correct boot banner and system prompt on PC

Log into the G10 CMTS

Initial Configuration of the G10 CMTS

If desired, create new usernames and passwords page 88

Configure miscellaneous parameters page 88

View and save running configuration page 88

Configure downstream channel parameters page 89

Configure upstream channel parameters page 90

Configure the Fast Ethernet interfaces page 91

Configure the Gigabit Ethernet interfaces page 92

Configure a management interface page 95

Step Page Number Completion Status

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Installation 39

Chapter 3Installation

This chapter describes the complete installation procedure for the G10 CMTS. It is assumed that all safety precautions and procedures described in “Preparation for Installation” on page 15 have been followed prior to performing the procedures presented in this chapter. We recommend that the entire installation process in this chapter be read prior to performing the actual G10 CMTS installation.

Ground the Chassis

Prior to rack mounting the G10 CMTS, an earth ground strap should be installed on the chassis, particularly if the sides of the chassis will be inaccessible after it is rack mounted. Figure 5 on page 10 shows the location of the chassis ground nuts on the chassis. The G10 CMTS accessory kit contains a two-ring lug connector that must be crimped to the ground strap. Using two of the supplied #12 screws and washers (a washer is installed between each bolt and the lug connector), attach the ground strap to the chassis using 35 in-lb of torque on each screw. The other end of the ground strap will be attached to earth ground after the chassis is rack mounted.

Before installing a power supply or any module into the G10 CMTS, attach one end of an ESD ground strap to your wrist and attach the other end to the ESD strap jack on the front of the chassis (see Figure 4 on page 9).

Never power on the G10 CMTS without first grounding the chassis.

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Rack Mounting

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G10 CMTS Installation and Operation40

Rack Mounting

This section describes the process for rack mounting the G10 CMTS into an EIA standard 19-inch rack. The mounting brackets are compatible with either of the following racks:

! Standard 1-3/4” EIA wide1-1/4”, 1/2”, 1-1/4” 12-24 tapped

! Standard 2” EIA wide1”, 1”12-24 tapped

The G10 CMTS is shipped from the factory with mounting brackets attached to the front of the chassis for front-rack mounting. If the chassis is to be mid-rack mounted, the mounting brackets must be removed and reinstalled to the center of the chassis.

The following procedure assumes that all the contents of the shipping cartons, including the G10 CMTS chassis, have been removed.

1. Prior to rack mounting, ensure that proper clearance is maintained between the G10 CMTS chassis and its surroundings to allow adequate air ventilation to flow into the air intakes and out of the air exhaust:

! A minimum of 3 feet (0.91 m) between the front of the chassis and any other object

! A minimum of 2 feet (0.61 m) between the rear of the chassis and any other object

! A minimum of 3 inches between each side of the chassis and any other object

Figure 10 on page 41 illustrates the air flow through the chassis.

The G10 CMTS chassis must be rack mounted prior to the installation of any additional power supplies or modules.

In general, when more than one piece of equipment is mounted into a rack, the heaviest piece of equipment should be installed at the bottom of the rack, and each successive piece installed should be lighter than the piece immediately below it. For planning purposes, a minimally-populated G10 CMTS weighs approximately 80 lb (36 kg), and a fully-populated G10 CMTS weighs approximately 140 lb (64 kg).

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Installation

Rack Mounting

41

If there is no other equipment installed in the rack, the G10 CMTS should be installed as low as possible into the rack.

Figure 10: Air Flow Through Chassis

The power supply faceplate must always be installed prior to powering on the G10 CMTS to ensure that proper air ventilation occurs throughout the chassis.

The G10 CMTS does not require any clearance between the bottom of the chassis and the floor. Similarly, there are no clearance requirements between the top of the chassis and the bottom of another G10 CMTS stacked above it on the same rack (see Figure 14 on page 45).

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Rack Mounting

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G10 CMTS Installation and Operation42

2. We recommend an equipment shelf be installed into the rack that can support the maximum weight (140 lb, or 64 kg) and dimensions of the chassis. The chassis dimensions, when viewed from the bottom, are provided in Figure 11 on page 42.

Figure 11: Bottom of Chassis

3. If the chassis will be front-rack mounted, jump ahead to Step 5. If the chassis will be mid-rack mounted, proceed to Step 4.

4. Remove the seven screws fastening the mounting brackets to the front of the chassis, align the brackets with the corresponding hole patterns in the center of the chassis, and insert the seven screws into the chassis. Apply 20 in-lb of torque to each of the seven screws.

5. When lifting the chassis, be sure to follow the safety precautions listed in the “Safety Precautions” on page 15. Using a lift (or at least three installers—one on the left, one on the right, and one in the front of the chassis), slowly lift and slide the G10 CMTS onto the equipment shelf. Figure 12 on page 43 illustrates the proper manner in which to manually lift the chassis such that the risk of injury is minimized.

6. Continue sliding the chassis all the way into the rack until the flanges of the mounting brackets are flush with the mounting rails of the rack, and the mounting holes in the mounting brackets are aligned with the corresponding holes in the mounting rails.

17.3 in (439.4 mm)

Front

18.6

in (

472.

6 m

m)

Do not use the handles on the rear fan tray to assist with lifting the G10 CMTS. These handles are solely for the purpose of removing the rear fan tray.

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Installation

Rack Mounting

43

7. Using the #12 screws supplied in the accessory kit (up to six for each mounting bracket), fasten the chassis to the rack by applying 30 in-lb of torque to each of the screws (see Figure 13 on page 44). Do not completely tighten any screw to its torque specification until all 12 screws are inserted.

8. Attach the ground strap to earth ground.

Figure 14 on page 45 illustrates a fully populated rack with three G10 CMTS chassis.

Figure 12: Lifting the Chassis

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Rack Mounting

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G10 CMTS Installation and Operation44

Figure 13: Rack-Mounted Chassis

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Installation

Install Power Supplies

45

Figure 14: Rack Fully Populated with Three G10 CMTS Chassis

At this point, the installation of any additional power supplies or modules can be installed in the chassis as described in “Install Power Supplies” on page 45 through “Install a NIC Access Module” on page 58.

Install Power Supplies

The G10 CMTS is shipped from the factory with a pre-configured number of power supplies installed. However, additional power supplies—up to a total of 10—might need to be installed based on current or future operating configurations of the G10 CMTS. Installing additional power supplies beyond the present requirements of the system provides power supply redundancy which ensures the CMTS will be adequately powered in the event one or more power supplies fail.

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Install Power Supplies

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G10 CMTS Installation and Operation46

The following procedure describes the steps required for installing additional power supplies:

1. The power supply faceplate must be removed by pulling the flanges on each side of the faceplate away from the chassis until the faceplate ball studs are removed from the power supply faceplate clips.

2. Decide the bay in which the power supply will be inserted. As described in the G10 CMTS Functional Description, the midplane is partitioned into two domains—Domain A (slots 1—6) and Domain B (slots 7, 9—13). The AC power supplies in each domain are supplied from the power source connected to that domain’s AC power transition module. However, the DC outputs of all ten power supplies in both domains are interconnected along the midplane. Therefore, if power source redundancy is not a consideration, adding an AC power supply to either domain will supply additional power to all the modules in the chassis. However, if power source redundancy is desired, the addition of an AC power supply in one domain must be accompanied with the addition of an AC power supply in the other domain. Within a domain, a power supply can be installed in any of the available five bays. Figure 15 on page 47 illustrates the two power supply domains.

Unlike the AC configuration, the DC power transition modules do not operate independently. Each DC power transition module supports the power supplies in both domains of the chassis. Therefore, power supply redundancy is independent of the domain in which a power supply is installed.

3. Remove the power supply filler panel covering the selected bay by loosening the two self-contained screws.

4. If the power supply’s ejector is locked in the vertical position, press down on the ejector release while simultaneously pulling the ejector away from the power supply. The ejector should rest at approximately 45° from the faceplate.

5. Each power supply bay has an upper and lower card guide. Align the printed circuit board of the power supply with the bay card guides and slowly slide the power supply into the bay until it comes to a stop with the inside tabs of the ejector (tabs closest to midplane) resting over the power supply ejector rail (see Figure 16 on page 48).

The power supplies and the chassis are mechanically keyed to ensure that same-type supplies and chassis (AC or DC) are used together. Do not attempt to remove or reconfigure the keys.

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Installation

Install Power Supplies

47

Figure 15: Front and Rear Views of Midplane

Front View

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Install Power Supplies

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G10 CMTS Installation and Operation48

Figure 16: Power Supply Installation

6. Firmly lift the ejector to the vertical position until the ejector release clicks into position. Check that the inside tabs of the ejector extend into the power supply ejector rail. At this point the front of the power supply should be flush with any other installed power supplies.

7. Tighten the upper and lower retainer screws by applying 3 in-lb of torque to each screw.

8. Repeat this process for all power supplies that must be installed.

9. Replace the power supply faceplate by aligning its four ball studs with the four power supply faceplate clips and pressing the faceplate towards the chassis until it snaps into place.

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The power supply faceplate and power supply filler panels must be replaced prior to powering on the G10 CMTS to ensure that proper air ventilation occurs throughout the chassis, and to reduce EMI emissions.

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Installation

Install a Power Transition Module

49

Install a Power Transition Module

The G10 CMTS is generally shipped with power transition modules installed at the factory. However, a G10 CMTS chassis can be ordered without power transition modules, in which case the modules must be ordered separately and installed into the chassis.

The following procedure describes how to install power transition modules into their empty bays within the chassis (see Figure 17 on page 50).

1. Slowly slide a module into its bay between the upper and lower power transition module guide rails. Ensure the module rests on top of the lower power transition module guide rail tabs.

2. As the module starts to make contact with the power transition module midplane connector, firmly push the module until it rests flush against the upper and lower power transition module mounting rails. You should be able to feel the slight resistance of the mating of the module connector with the midplane connector.

3. Tighten the four self-contained screws in each of the corners of the module. Apply 4 in-lb of torque to each of the four screws.

4. Repeat this procedure for the second power transition module.

! Do not use an AC and a DC power transition module in the same chassis. Either use two AC or two DC power transition modules.

! Ensure that the power supplies installed in the chassis (AC or DC) are consistent with the power transition modules installed (AC or DC).

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Install a Power Transition Module

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G10 CMTS Installation and Operation50

Figure 17: Power Transition Module Installation

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Installation

Install a DOCSIS Module

51

Install a DOCSIS Module

The G10 CMTS chassis accommodates a total of eight DOCSIS Modules. The chassis is not shipped from the factory with any DOCSIS Modules pre-installed into any card cage slots. All DOCSIS Modules ordered are packaged separately and must be installed at the headend after the G10 CMTS has been rack mounted. The card cage is shipped from the factory with seven air management modules populated into front slots that do not contain DOCSIS Modules, and seven air management panels into rear slots that do not contain HFC Connector Modules. These air management modules and panels act as baffles that prevent air from flowing upward through empty space or out of the chassis, and redirect the air flow through slots that contain active modules. A single card cage slot (front and back) is intentionally left unpopulated when shipped from the factory because at least one DOCSIS Modules and one HFC Connector Module must be installed in the system.

DOCSIS Modules are installed in the front of the G10 CMTS chassis in card cage slots 1 through 4 (for Domain A) and slots 10 through 13 (for Domain B). HFC Connector Modules are installed in the rear of the G10 CMTS chassis in card cage slots 1 through 4 (for Domain A) and slots 10 through 13 (for Domain B). See Figure 15 on page 47 and Figure 7 on page 12 for views of the front, rear, and top of the chassis midplane. To assist with the installation, the top of the air intake faceplate, the bottom of the power supply faceplate, and the top of the rear fan tray are labeled with the slot numbers.

As DOCSIS Modules are installed in your CMTS, ensure the correct number of power supplies are installed to support your configuration. Table 15 lists the number of power supplies required for the G10 CMTS for three different configurations: no power redundancy, N+1 power supply redundancy, and input power redundancy.

Table 15: Power Supply Requirements

Do not install DOCSIS Modules that support the DOCSIS standard and DOCSIS Modules that support the EuroDOCSIS standard within the same G10 CMTS chassis. DOCSIS Modules that support EuroDOCSIS are labeled as such on the front panel of the module.

Number ofDOCSIS Modules No Power Redundancy N+1 Power Redundancy Input Power Redundancy

1 3 4 6

2 4 5 8

3 5 6 10

4 5 6 10

5 6 7 Not supported

6 6 7 Not supported

7 7 8 Not supported

8 8 9 Not supported

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Install a DOCSIS Module

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G10 CMTS Installation and Operation52

The following procedure describes the steps required for installing a DOCSIS Module:

1. If applicable, remove the air management module from the slot. Loosen the two retainer screws, then press upward and downward on the ejector releases. Simultaneously pull the ejectors away from the module faceplate, and slowly slide the module out of its slot until it is fully removed from the system (see Figure 18 on page 53).

2. Remove the DOCSIS Module from its anti-static bag being careful to avoid directly touching any component on the module. Handling the module only by its card edges or ejectors is highly recommended.

3. If the upper or lower ejector of the DOCSIS Module is locked in the vertical position, press upward or downward, respectively, on the ejector release while simultaneously pulling the ejector away from the module faceplate. Each ejector should rest at approximately 45° away from its locked position.

4. Each DOCSIS Module card cage slot in the front of the chassis has an upper and lower card guide. Align the printed circuit board of the DOCSIS Module with the card guides and slowly slide the module into the slot until it comes to a stop with the inside tabs (tabs closest to midplane) of the upper and lower ejectors resting directly under and over, respectively, the module ejector rail (see Figure 19 on page 54).

5. Simultaneously close the ejectors toward the module faceplate to the vertical position until each ejector release clicks into position. At this point the DOCSIS Module faceplate should be flush with the faceplate of any other adjacent module.

6. Tighten the two retainer screws by applying 3 in-lb of torque to each screw.

If any G10 CMTS module has been removed from its anti-static bag and must be temporarily put aside prior to its installation, the module should be replaced into the anti-static bag, or placed on top of an anti-static mat that is properly grounded.

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Installation

Install a DOCSIS Module

53

Figure 18: Air Management Module Removal

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Install an HFC Connector Module

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G10 CMTS Installation and Operation54

Figure 19: DOCSIS Module Installation

Install an HFC Connector Module

The following procedure describes the steps required for installing an HFC Connector Module.

1. If applicable, remove the air management panel from the slot by loosening the two self-contained screws at the top and bottom of each panel.

2. Remove the HFC Connector Module from its anti-static bag being careful to avoid directly touching any component on the module. Handling the module only by its card edges or ejectors is highly recommended.

1

2

2

Unlike a DOCSIS Module, the ejectors on an HFC Connector Module lock in the horizontal position (90° from the faceplate) when the module is properly installed into its card slot.

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Installation

Install an HFC Connector Module

55

3. If the upper or lower ejector of the HFC Connector Module is locked in the horizontal position, press upward or downward, respectively, on the ejector release while simultaneously pulling the ejector away from the module faceplate. Each ejector should rest at approximately 45° away from its locked position.

4. Each HFC Connector Module card cage slot in the rear of the chassis has an upper and lower card guide. Align the printed circuit board of the HFC Connector Module with the card guides and slowly slide the module into the slot until it comes to a stop with the inside tabs (tabs closest to midplane) of the upper and lower ejectors resting directly under and over, respectively, the module ejector rail (see Figure 20).

5. Simultaneously close the ejectors toward the module faceplate to the horizontal position until each ejector clicks into position. At this point the HFC Connector Module faceplate should be flush with the faceplate of any other adjacent module.

6. Tighten the two retainer screws by applying 3 in-lb of torque to each screw.

Figure 20: HFC Connector Module Installation

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Install a Chassis Control Module

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G10 CMTS Installation and Operation56

Install a Chassis Control Module

The G10 CMTS chassis accommodates a maximum of two Chassis Control Modules. The chassis is shipped from the factory with a minimum of one Chassis Control Module and one CCM Access Module pre-installed into a card cage slot. An additional Chassis Control Module/CCM Access Module pair can be installed for redundancy in the remaining available slot.

Chassis Control Modules are installed in the front of the G10 CMTS chassis in card cage slots 6 (primary) and 7 (secondary). CCM Access Modules are installed in the rear of the G10 CMTS chassis in card cage slots 6 and slot 7. The following procedure describes the steps required for installing a Chassis Control Module:

1. If applicable, remove the air management module from the slot. Loosen the two retainer screws, then press upward and downward on the ejector releases. Simultaneously pull the ejectors away from the module faceplate, and slowly slide the module out of its slot until it is fully removed from the system (see Figure 18 on page 53).

2. Remove the Chassis Control Module from its anti-static bag being careful to avoid directly touching any component on the module. Handling the module only by its card edges or ejectors is highly recommended.

3. If the upper or lower ejector of the Chassis Control Module is locked in the vertical position, press upward or downward, respectively, on the ejector release while simultaneously pulling the ejector away from the module faceplate. Each ejector should rest at approximately 45° away from its locked position.

4. Each Chassis Control Module card cage slot in the front of the chassis has an upper and lower card guide. Align the printed circuit board of the Chassis Control Module with the card guides and slowly slide the module into the slot until it comes to a stop with the inside tabs (tabs closest to midplane) of the upper and lower ejectors resting directly under and over, respectively, the module ejector rail (this step is similar to the installation of a DOCSIS Module as illustrated in Figure 19 on page 54).

5. Simultaneously close the ejectors toward the module faceplate to the vertical position until each ejector release clicks into position. At this point the Chassis Control Module faceplate should be flush with the faceplate of any other adjacent module.

6. Tighten the two retainer screws by applying 3 in-lb of torque to each screw.

Install a CCM Access Module

The following procedure describes the steps required for installing a CCM Access Module (see Figure 24 on page 65 for an illustration of the rear panel).

1. If applicable, remove the air management panel from the slot by loosening the two self-contained screws at the top and bottom of each panel.

h

Unlike a Chassis Control Module, the ejectors on a CCM Access Module lock in the horizontal position (90° from the faceplate) when the module is properly installed into its card slot.

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Installation

Install a NIC Module

57

2. Remove the CCM Access Module from its anti-static bag being careful to avoid directly touching any component on the module. Handling the module only by its card edges or ejectors is highly recommended.

3. If the upper or lower ejector of the CCM Access Module is locked in the horizontal position, press upward or downward, respectively, on the ejector release while simultaneously pulling the ejector away from the module faceplate. Each ejector should rest at approximately 45° away from its locked position.

4. Each CCM Access Module card cage slot in the rear of the chassis has an upper and lower card guide. Align the printed circuit board of the CCM Access Module with the card guides and slowly slide the module into the slot until it comes to a stop with the inside tabs (tabs closest to midplane) of the ejectors resting directly under and over, respectively, the module ejector rail (this step is similar to the installation of an HFC Connector Module as illustrated in Figure 20 on page 55).

5. Simultaneously close the ejectors toward the module faceplate to the horizontal position until each ejector clicks into position. At this point the CCM Access Module faceplate should be flush with the faceplate of any other adjacent module.

6. Tighten the two retainer screws by applying 3 in-lb of torque to each screw.

Install a NIC Module

The G10 CMTS chassis accommodates a maximum of two NIC Modules. The chassis is not shipped from the factory with any NIC Modules pre-installed into a card cage slot. A NIC Module is packaged separately and must be installed at the headend after the G10 CMTS has been rack mounted.

NIC Modules are shipped from the factory with two multi-mode GBIC modules installed. If you are using a different GBIC module interface, you will need to replace the multi-mode GBIC modules that are shipped with the NIC Module. GBIC module removal and installation is performed while the NIC Module is installed in the chassis

NIC Modules are installed in the front of the G10 CMTS chassis in card cage slot 5 (for Domain A) and slot 9 (for Domain B). NIC Access Modules are installed in the rear of the G10 CMTS chassis in card cage slot 5 (for Domain A) and slot 9 (for Domain B).

The following procedure describes the steps required for installing a NIC Module:

1. If applicable, remove the air management module from the slot. Loosen the two retainer screws, then press upward and downward on the ejector releases. Simultaneously pull the ejectors away from the module faceplate, and slowly slide the module out of its slot until it is fully removed from the system (see Figure 18 on page 53).

2. Remove the NIC Module from its anti-static bag being careful to avoid directly touching any component on the module. Handling the module only by its card edges or ejectors is highly recommended.

3. If the upper or lower ejector of the NIC Module is locked in the vertical position, press upward or downward, respectively, on the ejector release while simultaneously pulling the ejector away from the module faceplate. Each ejector should rest at approximately 45° away from its locked position.

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Install a NIC Access Module

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G10 CMTS Installation and Operation58

4. Each NIC Module card cage slot in the front of the chassis has an upper and lower card guide. Align the printed circuit board of the NIC Module with the card guides and slowly slide the module into the slot until it comes to a stop with the inside tabs (tabs closest to midplane) of the upper and lower ejectors resting directly under and over, respectively, the module ejector rail (this step is similar to the installation of a DOCSIS Module as illustrated in Figure 19 on page 54).

5. Simultaneously close the ejectors toward the module faceplate to the vertical position until each ejector release clicks into position. Check that the inside tabs of each ejector are protruding inside the holes of the module ejector rail. At this point the NIC Module faceplate should be flush with the faceplate of any other adjacent module.

6. Tighten the two retainer screws by applying 3 in-lb of torque to each screw. If you will be using a GBIC module interface other than multi-mode, proceed to Step 7. Otherwise, you have completed the installation of the NIC Module.

7. Remove each multi-mode GBIC module from the installed NIC Module by squeezing the metal clasps at the top and bottom of the GBIC module towards the module itself, and firmly pull out the module until it is fully removed from its slot.

8. The GBIC modules that you will be using must now be installed in the NIC Module. With the label side of the GBIC module facing the right, slide each module into its NIC Module slot until the metal clasps at the top and bottom of the module click into place.

Install a NIC Access Module

The following procedure describes the steps required for installing a NIC Access Module.

1. If applicable, remove the air management panel from the slot by loosening the two self-contained screws at the top and bottom of each panel.

2. Remove the NIC Access Module from its anti-static bag being careful to avoid directly touching any component on the module. Handling the module only by its card edges or ejectors is highly recommended.

3. If the upper or lower ejector of the NIC Access Module is locked in the horizontal position, press upward or downward, respectively, on the ejector release while simultaneously pulling the ejector away from the module faceplate. Each ejector should rest at approximately 45° away from its locked position.

The GBIC module can only be installed one way. If it is oriented in its slot incorrectly, it will stop about halfway into the slot. If this occurs, remove the GBIC module, rotate it 180°, and reinstall it.

Unlike a NIC Module, the ejectors on a NIC Access Module lock in the horizontal position (90° from the faceplate) when the module is properly installed into its card slot.

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Installation

Cable an HFC Connector Module

59

4. Each NIC Access Module card cage slot in the rear of the chassis has an upper and lower card guide. Align the printed circuit board of the NIC Access Module with the card guides and slowly slide the module into the slot until it comes to a stop with the inside tabs (tabs closest to midplane) of the upper and lower ejectors resting directly under and over, respectively, the module ejector rail (this step is similar to the installation of an HFC Connector Module as illustrated in Figure 20 on page 55).

5. Simultaneously close the ejectors toward the module faceplate to the horizontal position until each ejector release clicks into position. Check that the inside tabs of each ejector are protruding inside the holes of the module ejector rail.At this point the NIC Access Module faceplate should be flush with the faceplate of any other adjacent module.

6. Tighten the two retainer screws by applying 3 in-lb of torque to each screw.

Cable an HFC Connector Module

This section describes how to connect the four downstream and four upstream F-connector ports of an HFC Connector Module. This section also describes how to connect the two 10/100BASE-T Ethernet ports on an HFC Connector Module.

Cable the F-connector Ports

Each DOCSIS Module— and its corresponding HFC Connector Module—support a total of four downstream channels, where one channel is assigned to each physical downstream port. Each DOCSIS Module supports a total of 8 or 16 upstream channels (depending on the DOCSIS Module model) which can be logically allocated to any one of the four physical upstream ports. Figure 21 on page 60 illustrates an example where the number of channels allocated on each port is five, three, seven, and one, respectively. The assignment of a node to a port, and the allocation of upstream channels per upstream port should be considered prior to connecting the coaxial cables from the cable plant to the HFC Connector Module.

Prior to inserting a coaxial cable into any of the HFC Connector Module F-connectors, ensure that the cable meets the requirements provided in “Coaxial Cable Requirements” on page 189.

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Cable an HFC Connector Module

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G10 CMTS Installation and Operation60

Figure 21: Example of Allocation of Multiple Channels Per Port

One possible deployment scenario for the upstream is to attach one node per upstream port and to turn on one upstream channel per node. If one of the nodes reaches capacity due to high penetration or heavy usage of bandwidth-intensive services, another channel can be provisioned on that port.

The following procedure describes how to connect to the downstream ports (see Figure 22 for port labeling):

1. Select the first node(s) in the cable plant for assignment to the first of four downstream ports.

2. Connect the coaxial cable associated with the first node(s) to the F-connector on the HFC Connector Module labeled DS 0.

3. If applicable, select the second, third, and fourth nodes in the cable plant for assignment to the remaining three downstream ports.

4. If applicable, connect the coaxial cables associated with the second, third, and fourth nodes to the F-connectors on the HFC Connector Module labeled DS 1, DS 2, and DS 3.

When tightening a coaxial cable onto an F-connector, use a 7/16 in. torque wrench to apply torque according to SCTE standards.

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Installation

Cable an HFC Connector Module

61

Figure 22: HFC Connector Module Rear Panel

The following procedure describes how to connect to the upstream ports (see Figure 22 for port labeling):

Eth0

Eth1

US 3

US 2

US 1

US 0

DS 3

DS 2

DS 1

DS 0

In the following procedure, a node can represent a single node, or multiple nodes that are combined.

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Cable an HFC Connector Module

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G10 CMTS Installation and Operation62

1. Select the first node(s) in the cable plant for assignment to the first of four upstream ports.

2. Connect the coaxial cable associated with the first node(s) to the F-connector on the HFC Connector Module labeled US 0.

3. If applicable, select the second, third, and fourth nodes in the cable plant for assignment to the remaining three upstream ports.

4. If applicable, connect the coaxial cables associated with the second, third, and fourth nodes to the F-connectors on the HFC Connector Module labeled US 1, US 2, and US 3.

5. All coaxial cables should be dressed appropriately and routed to avoid obstructing the rear connections of the G10 CMTS (see Figure 23 on page 63). The usage of cable organizers is recommended to assist with cable routing.

If a NIC Module is not used in the G10 CMTS, connect each of the two 10/100BASE-T Ethernet RJ-45 ports labeled Eth0 and Eth1 to the appropriate network equipment in the headend (see Figure 22 on page 61 for port labeling).

If a NIC Module is installed, see “Cable a NIC Access Module” on page 69 for a description on how to connect the HFC Connector Module Ethernet ports to the NIC Access Module.

When connecting nodes to the upstream ports of an HFC Connector Module, do not split a coaxial cable from one node and attach it to more than one upstream port. Doing so prevents you from using the complete features of a DOCSIS Module that were designed for supporting four separate nodes or four groups of nodes that are combined.

Both Ethernet RJ-45 ports on the HFC Connector Module must be connected to the network.

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Installation

Cable an HFC Connector Module

63

Figure 23: Rear Coaxial Cable Connections

Eth1

Eth1

US D

US C

US B

US 0

DS D

DS C

DS 1

DS 0

Eth0

Eth1

US D

US C

US B

US 0

DS D

DS C

DS 1

DS 0

Eth0

Eth1

US D

US C

US B

US 0

DS D

DS C

DS 1

DS 0

Eth0

Eth1

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US 2

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Eth1

Eth1

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Eth1

Eth1

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Eth0

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US 3

US 2

US 1

US 0

DS 3

DS 2

DS 1

DS 0

Eth0

Eth1

COM

Eth0

Eth1

COM

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Cable a Chassis Control Module

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G10 CMTS Installation and Operation64

Cable a Chassis Control Module

The Chassis Control Module contains a 10/100BASE-T Ethernet RJ-45 port labeled Eth0 on its front panel (see Figure 24 on page 65). This port is used for the management interface to the G10 CMTS.

The following procedure describes how to connect this port to the network:

1. Carefully thread the Ethernet cable into the cable channel from the rear of the chassis (see Figure 5 on page 10) until it extends through the opening of the power supply faceplate.

2. Plug the RJ-45 connector of the Ethernet cable into the RJ-45 port of the Chassis Control Module labeled Eth0.

3. Attach the other end of the Ethernet cable to its respective network equipment in the headend.

4. If another Chassis Control Module is installed in the chassis for redundancy, repeat Step 1 and Step 2.

5. Attach the Ethernet cable from the secondary Chassis Control Module in slot 7 to the same Ethernet switch as the primary Chassis Control Module in slot 6. This facilitates the seamless manageability of the CMTS when a switchover from the primary to the secondary module occurs.

The CCM Access Module is not used in this procedure.

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Installation

Cable a Chassis Control Module

65

Figure 24: Chassis Control Module and CCM Access Module Panels

COM

Eth0

Eth1

Eth0

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Cable a NIC Module

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G10 CMTS Installation and Operation66

Cable a NIC Module

The NIC Module contains two full-duplex, 1-Gigabit Ethernet GBIC (gigabit interface converter) transceiver ports on its front panel. See “GBIC Interface Specifications” on page 191 for the specifications of the various types of GBIC interfaces provided.

The following procedure describes how to connect the network cables to these ports (see Figure 25 on page 67 for port labeling):

1. Carefully thread each of the two cables into the cable channel from the rear of the chassis (see Figure 5 on page 10) until they extend through the opening of the power supply faceplate.

2. Connect the transmit/receive pair of each of these cables to the GBIC ports labeled 0 and 1 on the NIC Module.

3. Attach the other end of each cable to its respective network equipment in the headend.

4. Repeat this process if another NIC Module is installed in the chassis.

Figure 26 on page 68 provides the front view of the chassis with the network cables installed into a NIC Module.

Link Aggregation

The NIC Module supports 802.3ad link aggregation. If link aggregation is configured for two Gigabit ports across two NIC Modules, Gigabit port 0 on each NIC Module is used for the aggregate link, and Gigabit port 1 on each NIC Module is used for the stacking port (Gigabit port 1 is also used for the stacking link when switched general-purpose Fast Ethernet ports across two NIC Modules are aggregated). Follow these steps to connect the network cables for this configuration:

1. Carefully thread two cables into the cable channel from the rear of the chassis (see Figure 5 on page 10) until they extend through the opening of the power supply faceplate.

2. Connect the transmit/receive pair of one cable to the GBIC port labeled 0 on the NIC Module in slot 5, and connect the transmit/receive pair of the other cable to the GBIC port labeled 0 on the NIC Module in slot 9. These two ports represent the aggregate link.

3. Attach the other end of each cable to its respective network equipment in the headend.

4. Connect the transmit/receive pair of a third cable to the GBIC port labeled 1 on the NIC Module in slot 5, and connect the transmit/receive pair of the other end of the cable to the GBIC port labeled 1 on the NIC Module in slot 9. These two ports are used for the stacking function.

If using optical cables, take care not to bend the cables too sharply when threading them through the cable channel.

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Installation

Cable a NIC Module

67

Figure 25: NIC Module and NIC Access Module Panels

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PULL

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CLK PWR RTM OK

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Cable a NIC Module

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G10 CMTS Installation and Operation68

Figure 26: NIC Module Cabling – Front View

Power

Fault

Power

Fault

Power

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Power

Fault

Power

Fault

Power

Fault

Power

Fault

Power

Fault

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Installation

Cable a NIC Access Module

69

Cable a NIC Access Module

This section describes how to interconnect up to two NIC Access Modules to multiple HFC Connector Modules in a non-redundant configuration. The procedure assumes that a NIC Module only supports the DOCSIS Modules installed in the same domain of the chassis. Therefore, if five or more DOCSIS Modules are installed in the system, two NIC Modules are installed to support them. In addition, the procedure assumes that DOCSIS Modules are installed in the following slot order: 1, 2, 3, 4, 10, 11, 12, 13.

The NIC Access Module cables are used to interconnect the Fast Ethernet ports of the HFC Connector Modules to the NIC Access Module. Four of the RJ-45 connectors on the NIC Access Module cable plugged into the connector labeled 2 on the NIC Access Module can be used as general-purpose switched Fast Ethernet ports. See Table 16 on page 72 for details.

1. If applicable, remove the protective cover that is inserted into the RJ-21 end of the NIC Access Module cable.

2. Firmly insert the RJ-21 end of the cable into the connector labeled 1 on the NIC Access Module in slot 5 (see Figure 25 on page 67).

3. Tighten the two cable retainer screws by applying 4 in-lb of torque to each of the screws.

4. Locate the RJ-45 connectors of the NIC Access Module cable labeled PORT 5 and PORT 6 and plug them into the RJ-45 ports of the HFC Connector Module in slot 1 labeled Eth0 and Eth1, respectively (see Figure 22 on page 61 for port labeling). If an HFC Connector Module is installed in slot 2, proceed to Step 5; otherwise, jump ahead to Step 15.

5. Locate the RJ-45 connectors of the NIC Access Module cable labeled PORT 7 and PORT 8 and plug them into the RJ-45 ports of the HFC Connector Module in slot 2 labeled Eth0 and Eth1, respectively. If an HFC Connector Module is installed in slot 3, proceed to Step 6; otherwise, jump ahead to Step 15.

6. Locate the RJ-45 connectors of the NIC Access Module cable labeled PORT 9 and PORT 10 and plug them into the RJ-45 ports of the HFC Connector Module in slot 3 labeled Eth0 and Eth1, respectively. If an HFC Connector Module is installed in slot 4, proceed to Step 7; otherwise, jump ahead to Step 15.

7. Locate the RJ-45 connectors of the NIC Access Module cable labeled PORT 11 and PORT 12 and plug them into the RJ-45 ports of the HFC Connector Module in slot 4 labeled Eth0 and Eth1, respectively. If an HFC Connector Module is installed in slot 10, proceed to Step 8; otherwise, jump ahead to Step 15.

In this particular procedure, the RJ-45 ports of the CCM Access Module labeled Eth0 and Eth1 are unused.

We recommend the following procedure be followed to allow for future wiring considerations.

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Cable a NIC Access Module

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G10 CMTS Installation and Operation70

8. If you have reached this step in the procedure, at least five HFC Connector Modules are installed in the G10 CMTS, in which case a second NIC Access Module and its corresponding cable are required to complete the interconnection procedure. If applicable, remove the protective cover that is inserted into the RJ-21 end of the NIC Access Module cable.

9. Firmly insert the RJ-21 end of the second NIC Access Module cable into the connector labeled 1 on the NIC Access Module in slot 9 (see Figure 25 on page 67).

10. Tighten the two cable retainer screws by applying 4 in-lb of torque to each of the screws.

11. Locate the RJ-45 connectors of the NIC Access Module cable labeled PORT 5 and PORT 6 and plug them into the RJ-45 ports of the HFC Connector Module in slot 10 labeled Eth0 and Eth1, respectively. If an HFC Connector Module is installed in slot 11, proceed to Step 12; otherwise, jump ahead to Step 15.

12. Locate the RJ-45 connectors of the second NIC Access Module cable labeled PORT 7 and PORT 8 and plug them into the RJ-45 ports of the HFC Connector Module in slot 11 labeled Eth0 and Eth1, respectively. If an HFC Connector Module is installed in slot 12, proceed to Step 13; otherwise, jump ahead to Step 15.

13. Locate the RJ-45 connectors of the NIC Access Module cable labeled PORT 9 and PORT 10 and plug them into the RJ-45 ports of the HFC Connector Module in slot 12 labeled Eth0 and Eth1, respectively. If an HFC Connector Module is installed in slot 13, proceed to Step 14; otherwise, jump ahead to Step 15.

14. Locate the RJ-45 connectors of the NIC Access Module cable labeled PORT 11 and PORT 12 and plug them into the RJ-45 ports of the HFC Connector Module in slot 13 labeled Eth0 and Eth1, respectively.

15. At this point, all the Ethernet ports of the HFC Connector Modules should be connected to the NIC Access Module. Figure 27 on page 71 provides an illustration of these connections (without the HFC Connector Module coaxial cables shown).

16. All used and unused Ethernet cable wires on either NIC Access Module cable should be dressed appropriately and routed to avoid obstructing the rear connections of the G10 CMTS.

Table 16 on page 72 summarizes the NIC Access Module wiring plan used in this procedure. The “Module – Slot / Port” headings specify the module name, the slot in which the module is installed, and the RJ-45 port label of the module.

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Installation

Cable a NIC Access Module

71

Figure 27: NIC Access Module Cable Connections

Eth0

Eth1

COM

Eth0

Eth1

COM

Eth0

Eth1

US 3

US 2

US 1

US 0

DS 3

DS 2

DS 1

DS 0

Eth0

Eth1

US 3

US 2

US 1

US 0

DS 3

DS 2

DS 1

DS 0

Eth0

Eth2

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US 2

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DS 2

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Eth1

Eth2

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Eth0

Eth1

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US 1

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Eth0

Eth1

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US 1

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Eth0

Eth1

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US 2

US 1

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DS 3

DS 2

DS 1

DS 0

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Attach a PC to the Chassis Control Module

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G10 CMTS Installation and Operation72

Table 16: NIC Access Module Wiring Plan

Attach a PC to the Chassis Control Module

Initial configuration of the G10 CMTS requires a direct connection between a personal computer (PC) and the Chassis Control Module. Using the DB-9–to–DB-9 null modem serial cable supplied in the accessory kit, connect one end of the cable to the RS-232 DB-9 port labeled COM on the Chassis Control Module front panel (see Figure 24 on page 65), and connect the other end to the serial port on your PC.

NIC Access Module 5 NIC Access Module 9

Cable/Port Module – Slot/Port Cable/Port Module – Slot/Port

Cable 1 / PORT 1 Reserved Cable 1 / PORT 1 Reserved

Cable 1 / PORT 2 Reserved Cable 1 / PORT 2 Reserved

Cable 1 / PORT 3 Reserved Cable 1 / PORT 3 Reserved

Cable 1 / PORT 4 Reserved Cable 1 / PORT 4 Reserved

Cable 1 / PORT 5 HFC – 1 / Eth0 Cable 1 / PORT 5 HFC – 10 / Eth0

Cable 1 / PORT 6 HFC – 1 / Eth1 Cable 1 / PORT 6 HFC – 10 / Eth1

Cable 1 / PORT 7 HFC – 2 / Eth0 Cable 1 / PORT 7 HFC – 11 / Eth0

Cable 1 / PORT 8 HFC – 2 / Eth1 Cable 1 / PORT 8 HFC – 11 / Eth1

Cable 1 / PORT 9 HFC – 3 / Eth0 Cable 1 / PORT 9 HFC – 12 / Eth0

Cable 1 / PORT 10 HFC – 3 / Eth1 Cable 1 / PORT 10 HFC – 12 / Eth1

Cable 1 / PORT 11 HFC – 4 / Eth0 Cable 1 / PORT 11 HFC – 13 / Eth0

Cable 1 / PORT 12 HFC – 4 / Eth1 Cable 1 / PORT 12 HFC – 13 / Eth1

Cable 2 / PORT 1 Reserved Cable 2 / PORT 1 Reserved

Cable 2 / PORT 2 Reserved Cable 2 / PORT 2 Reserved

Cable 2 / PORT 3 Reserved Cable 2 / PORT 3 Reserved

Cable 2 / PORT 4 Reserved Cable 2 / PORT 4 Reserved

Cable 2 / PORT 5 Reserved Cable 2 / PORT 5 Reserved

Cable 2 / PORT 6 Reserved Cable 2 / PORT 6 Reserved

Cable 2 / PORT 7 Reserved Cable 2 / PORT 7 Reserved

Cable 2 / PORT 8 Reserved Cable 2 / PORT 8 Reserved

Cable 2 / PORT 9 Fast Ethernet or Unused1 Cable 2 / PORT 9 Fast Ethernet or Unused1

Cable 2 / PORT 10 Fast Ethernet or Unused1 Cable 2 / PORT 10 Fast Ethernet or Unused1

Cable 2 / PORT 11 Fast Ethernet or Unused1 Cable 2 / PORT 11 Fast Ethernet or Unused1

Cable 2 / PORT 12 Fast Ethernet or Unused1 Cable 2 / PORT 12 Fast Ethernet or Unused1

1. These ports can be used as general-purpose switched Fast Ethernet ports; otherwise, these connectors are unused. Ports 9–12 on Cable 2 correspond to Fast Ethernet ports 0–3, respectively, under the interface fastEthernet sub-mode for the NIC Module.

An adapter might be needed to connect the DB-9 connector of the cable to the serial port of your PC (for example, DB-9–to–DB-25).

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Installation

Connect to Power Sources

73

Connect to Power Sources

AC Power

Each AC power transition module in the G10 CMTS chassis contains a standard IEC 15-A three-prong male AC power receptacle for connecting to an AC power source (see Figure 5 on page 10). Facing the rear of the chassis, the AC power transition modules on the right and left sides of the chassis independently support the power supplies in Domain A and Domain B, respectively.

The following procedure describes the steps for connecting the AC power transition modules to their power sources (see Figure 28 on page 74):

1. Ensure that the rocker switch on each AC power transition module is in the OFF (O) position.

2. Swing the power cord retainer clips to their upright position, plug the female end of each 15-A power cord supplied with your shipment into the AC power receptacle on each AC power transition module, then close the retainer clips so that they clasp around the power cords.

3. Plug the male end of each 15-A power cord to independent power sources. Always use AC power sources that support the ground prong of the power cord.

Ensure that you have read and taken the proper safety precautions as described in “Preparation for Installation” on page 15 prior to connecting an AC or DC power source to the G10 CMTS.

To enhance the redundancy capabilities, each power transition module must be powered by sources on different circuits.

The G10 CMTS power supplies are autosensing which enables them for usage with 115 VAC or 230 VAC.

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Connect to Power Sources

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G10 CMTS Installation and Operation74

Figure 28: AC Power Cord and Retainer Clip

DC Power

Each DC power transition module in the G10 CMTS chassis contains a terminal block for connecting to a DC power source (see Figure 29 on page 75). Unlike the AC configuration, the DC power transition modules do not operate independently. Each DC power transition module supports the power supplies in both domains of the chassis.

The following procedure describes the steps for connecting the DC power transition modules to their power sources:

1. Shipped with the G10 CMTS are ring lugs that are used to connect the DC power cord to the DC power transition module terminal block. These ring lugs must be crimped to the negative (–) and positive (+) wires of the DC power cord in order to properly connect to the DC power transition module.

2. Remove the plastic guard over the DC terminal block by loosening the two fastening screws until the guard can be removed by sliding it upward and over the two screws (Figure 29 on page 75 shows the DC terminal block with a transparent guard installed). The guard will be reinstalled in step 7 below.

Power CordRetainer Clip

To enhance the redundancy capabilities, we recommend that each power transition module be powered by sources on different circuits.

We recommand you use 10–12 AWG wires for your power feeds unless your local safety code states otherwise.

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Installation

Connect to Power Sources

75

3. Remove the screw from the negative (–) terminal on the terminal block of the DC power transition module, insert the screw through the ring lug of the power cord that will be attached to the negative (–) terminal of the DC power source, and tighten the screw into the negative (–) terminal on the terminal block. Apply 20 in-lb of torque to the screw.

4. Remove the screw from the positive (+) terminal on the terminal block of the DC power transition module, insert the screw through the ring lug of the power cord that will be attached to the positive (+) terminal of the DC power source, and tighten the screw into the positive (+) terminal on the terminal block. Apply 20 in-lb of torque to the screw.

5. Connect the other end of the power cord connected to the negative (–) terminal on the terminal block of the DC power transition module to the negative (–) terminal of the DC power source in accordance with the manufacturer’s specifications.

6. Connect the other end of the power cord connected to the positive (+) terminal on the terminal block of the DC power transition module to the positive (+) terminal of the DC power source in accordance with the manufacturer’s specifications.

7. Replace the plastic guard over the two fastening screws, slide the guard down, then tighten the screws using a torque of 2.5 in-lb.

Figure 29: DC Power Transition Module

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Connect to Power Sources

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G10 CMTS Installation and Operation76

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Configuration and Operation 77

Chapter 4Configuration and Operation

This chapter describes the initial configuration procedure for the G10 CMTS, and additional procedures used to perform various operational tasks. It is assumed that the installation procedures described in “Installation” on page 39 have been followed prior to performing the procedures presented in this chapter. We recommend the entire configuration process in this chapter be read prior to performing the actual G10 CMTS configuration.

Power On the G10 CMTS

The following steps define the power-on procedure and the expected state of the LEDs on the power supplies, fan trays, and module panels that should be monitored after the G10 CMTS is powered on.

1. Ensure that the power sources connected to the power transition modules are on.

2. If the G10 CMTS is AC-powered, press the rocker switch on each AC power transition module to the ON (|) position (see Figure 28 on page 74). There is no requirement that the two power switches be turned on in any particular order. If the G10 CMTS is DC powered, the system will be powered up when the DC power transition modules have been connected to the DC power sources.

Ensure that you have read and taken the proper safety precautions as described in “Preparation for Installation” on page 15 prior to powering on the G10 CMTS.

Before replacing any module that appears to be faulty based on its LED status, contact Juniper Networks customer support for technical assistance.

The procedure that follows assumes that both domain A and domain B are connected to power sources.

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G10 CMTS Installation and Operation78

3. Remove the power supply faceplate by pulling the flanges on each side of the faceplate away from the chassis until the faceplate ball studs are removed from the power supply faceplate clips. Ensure that all power supplies are operating normally by checking that the POWER LED is illuminated green and the FAULT LED is not illuminated. If this is not the case, see Table 17 for a list of other LED combinations and the corresponding action to take.

Table 17: Power Supply LEDs

4. Replace the power supply faceplate by aligning its four ball studs with the four power supply faceplate clips and pressing the faceplate towards the chassis until it snaps into place.

5. Ensure that the fan tray LEDs (two in front, one in rear) are not illuminated (see Figure 3 on page 8 and Figure 6 on page 11 for the location of these LEDs). If any fan tray LED is illuminated red, one or more fans in that tray has failed and the entire tray must be replaced (see “Replace a Fan Tray” on page 160).

POWER FAULT Potential Meaning Action

Green Not illuminated Normal operation None

Green Red Over-temperature – Check that fan trays are operational (see Step 5 on page 78).

– Ensure all empty module slots and power supply. bays are populated with air management modules, panels, and filler panels.

– Ensure air intakes and exhaust are not blocked.

Green Red Over-current or over power limit condition Ensure that the correct number of power supplies are installed to support the CMTS configuration.

Not illuminated Red Voltage input failure (see Note 1) Ensure that the external power sources operating within specification.

Not illuminated Not illuminated – Power supply not installed correctly

– No input power and no DC output from other power supplies to illuminate FAULT LED

– Power down the G10 CMTS and reinstall the power supply as described on “Install Power Supplies” on page 45 (see Note 2)

– Ensure that the external power sources are on.

Note 1: FAULT LED is illuminated only if the DC output voltage is present from other power supplies.

Note 2: If power supply redundancy is implemented, a power supply can be replaced without powering down the system.

To minimize the risk of damage to the G10 CMTS, a failed fan tray should be replaced as soon as possible to ensure that proper air ventilation occurs throughout the chassis.

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Configuration and Operation 79

6. Immediately after the G10 CMTS is powered on, check that the Test LED on every DOCSIS Module faceplate is green and blinking (see Figure 30 on page 80). This indicates that the module’s self test is running. Continue to monitor each module’s Test LED until it stops blinking, at which point a green illuminated LED indicates the successful completion of that module’s self test. If any module’s Test LED is red, this indicates the self test was not successful and the module might have to be replaced (see “Remove a DOCSIS Module” on page 164). Table 18 indicates the expected status of all the LEDs on the module’s front panel following the successful completion of the self test.

Table 18: DOCSIS Module LED Status

LED Status Meaning

CPCI Green Blinking cPCI bus activity

Test Green Self test successful

1 Green Operating system initialization completed successfully on CPU0

2 Green Operating system initialization completed successfully on CPU3

3 Green Obtained boot instructions from Chassis Control Module

4 Green Operating system initialization completed successfully on CPU2

5 Green IP connectivity with Chassis Control Module established

6 Green Operating system initialization completed successfully on CPU1

Eth0 OFF No link present

Eth1 OFF No link present

Activity 0 OFF No activity

Activity 1 OFF No activity

Link OFF No link present

10/100 OFF Off – 10 MHz

On – 100 MHz

Hot Swap OFF Not safe to remove module

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G10 CMTS Installation and Operation80

Figure 30: DOCSIS Module Front Panel

Hot Swap

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Configuration and Operation 81

7. Immediately after the G10 CMTS is powered on, check that the Power LED on the Chassis Control Module faceplate is green (see Figure 31 on page 82 for the location of the Power LED). If the Power LED is red, this indicates a short circuit or over-current condition is detected, in which case the module might have to be replaced (see “Remove a Chassis Control Module” on page 167). Table 19 indicates the expected status of all the LEDs on the module’s front panel following power-on.

Table 19: Chassis Control Module LED Status

LED Status Meaning

Minor OFF [TBD]

Major OFF No event of priority Error has occurred.

Critical OFF No event of priority Emergency, Alert, or Critical has occurred.

Run Green Module is active

ACO OFF Alarm Cutoff not activated

∆1 ∆2 Green On – Active module

Off – Stand-by module

IDE OFF IDE inactive

Power Green Power is applied

USR1 [TBD] [TBD]

USR2 [TBD] [TBD]

Hot Swap OFF Not safe to remove module

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G10 CMTS Installation and Operation82

Figure 31: Chassis Control Module Front Panel

Eth0

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Configuration and Operation 83

8. Immediately after the G10 CMTS is powered on, wait for the OK LED on the NIC Module faceplate to illuminate green, which indicates the module initialization has been successfully completed (see Figure 25 on page 67). Certain additional LEDs will be in one state during the initialization (OK LED not illuminated), then change to another state after the initialization (OK LED illuminated green). Table 19 on page 81 indicates the expected status of these particular LEDs, as well as the remaining LEDs on the module’s front panel. If the OK LED does not illuminate, the NIC Module is considered faulty and might have to be replaced (see “Remove a NIC Module” on page 168).

Table 20: NIC Module LED Status

9. The four LEDs at the top of the NIC Access Module rear panel should be checked after confirming the LEDs on its corresponding NIC Module are in the correct state as described in Step 8 (see Figure 25 on page 67). Table 21 indicates the expected status of all the LEDs on the NIC Access Module’s rear panel following power-on. If the OPERATION LED is not illuminated green, the NIC Access Module is considered faulty and might have to be replaced (see the “Remove a NIC Access Module” on page 168).

Table 21: NIC Access Module LED Status

LED Pre-initialization Status Post-initialization Status Meaning

Pull Red OFF Normal operation

0 through 23 OFF OFF No link or activity on channels

GB1 and GB0 OFF OFF No link on gigabit channels

CLK Green OFF Undefined

PWR Green Green Power is applied

RTM Green Green Continuity established with NAM

OK OFF Green Successful initialization

EXT FLT Amber OFF No external failure

Amber One or more of the FE or GE ports is enabled, but unused

INT FLT Amber OFF No internal failure

Hot Swap OFF OFF Not safe to remove module

LED Post-initialization Status Meaning

POWER Green Power is applied

OPERATIONAL Green Successful initialization

INT FAULT OFF No internal failure

EXT FAULT OFF No external failure

Amber One or more of the FE or GE ports is enabled, but unused

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Power On and Configure the PC

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Power On and Configure the PC

1. Power on the personal computer (PC) attached to the serial port of the Chassis Control Module.

2. Launch your asynchronous terminal emulation application (such as Microsoft Windows Hyperterminal), and establish a direct connection. Configure the port settings as follows:

! Bits per second: 9600

! Data bits: 8

! Parity: None

! Stop bits: 1

! Flow control: None

3. When a successful connection is made between the PC and the G10 CMTS, the terminal emulation screen on your PC will display a banner and prompt you for a login username:

Copyright (c) 2000-2002 Juniper Networks, Inc.

G10 CMTS Release sw_rev_num

Login:

where sw_rev_num represents the software revision number

Log In and Out of the G10 CMTS

1. Type root at the login prompt and press ENTER:

Login: root

2. You will then be prompted for a password. Type changeme as the password and press ENTER:

Password: changeme

You will see the following Command-Line Interface (CLI) system prompt:

GX$root#

3. If desired, you can logout of the system as follows:

GX$root# logout

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Initial Configuration of the G10 CMTS

This section describes how to use the CLI to perform the initial configuration of the G10 CMTS. The complete details of the CLI can be found in the G-series CMTS CLI and SNMP Reference.

The procedures provided herein describe how to configure the following:

! Usernames and passwords

! Miscellaneous parameters

! Configuration file

! Downstream channel parameters

! Upstream channel parameters

! A single cable interface consisting of one downstream channel and one upstream channel on a DOCSIS Module/HFC Connector Module pair in slot 1

! Two Fast Ethernet interfaces on a DOCSIS Module/HFC Connector Module pair in slot 1

! Two Gigabit Ethernet interfaces on a NIC Module in slot 5

! Management interface

! Redundant Chassis Control Modules

These procedures are provided for illustration. The slot and interface used in these procedures are usually specified in a general manner as <slot/if>. The actual parameters specified during your initial configuration are dependent on your particular preferences, as well as your network and HFC plant characteristics.

Slot Numbers

The G10 CMTS chassis contains 12 slots that can be populated with modules. The enumeration of the slots and the modules assigned to these slots are illustrated in Figure 7 on page 12. The slot number is used in conjunction with the interface number to enter the interface cable, the interface fastEthernet, or the interface gigaEthernet submodes.

Interfaces

A cable interface is a logical entity that consists of at least one upstream and one downstream port. A cable interface is the same as a MAC domain. The traffic through even numbered cable interfaces (0 and 2) is forwarded through the Ethernet port 0 on the HFC Connector Module, while traffic through odd numbered cable interfaces (1 and 3) is forwarded through the Ethernet port 1 on the HFC Connector Module. This relationship is summarized in Table 22.

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Initial Configuration of the G10 CMTS

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Table 22: Cable Interface to Ethernet Port Association

The G10 CMTS is shipped with a default cable interface assignment as presented in Table 23 through Table 25 on page 87. Note that the downstream and upstream channel to cable interface assignments and the upstream channel to upstream port assignments specified in these tables are the factory defaults, and can be changed through the CLI or the startup-config file. The default assignments are used if the startup-config file does not assign any downstream or upstream channels to a slot/interface (MAC domain). The procedures in this chapter assume this default assignment.

Table 23: Downstream Channel Assignment

Table 24: Upstream Channel Assignment (8-Channel DOCSIS Module)

Cable Interface Associated Ethernet Port

0 Eth0

1 Eth1

2 Eth0

3 Eth1

Some of the CLI commands used in the following procedures set various parameters to their default values and hence their execution is not mandatory. These commands are provided for illustration purposes.

Cable Interface Downstream Channel Downstream Port

0 0 DS 0

1 1 DS 1

2 2 DS 2

3 3 DS 3

Cable Interface Upstream Channel Upstream Port

0 0 US 0

1

1 2 US 1

3

2 4 US 2

5

3 6 US 3

7

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Table 25: Upstream Channel Assignment (16-Channel DOCSIS Module)

Interface is also used describe the Fast Ethernet and the Gigabit Ethernet ports, which are also configurable. Here, the interface number is the port number.

Port

A port is a physical connector.

Use the numerical part of the connector label for the port ID during configuration tasks.

Channel

A channel is a logical entity. There are four downstream channels and 8 or 16 upstream channels (depending on the DOCSIS Module model) routed through each HFC Connector Module / DOCSIS Module pair.

Downstream channels are assigned one-each to the DS ports. Channels are enumerated 0 – 3.

Upstream channels can be assigned to any US port. Channels are enumerated 0 – 7 or 0 – 15, depending on the DOCSIS Module model.

Cable Interface Upstream Channel Upstream Port

0

0

US 01

8

9

1

2

US 13

10

11

2

4

US 25

12

13

3

6

US 37

14

15

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Initial Configuration of the G10 CMTS

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Create Usernames and Passwords

1. At the initial CLI command prompt, you are in the read-write privilege mode. If desired, you can enter the configure terminal mode and change your password from the default of changeme:

GX$root# configure terminal

GX$root(config)# username root password myword

2. You might also want to create new usernames and passwords. Because you are in the read-write privilege mode, any newly created username has read-write privilege mode access:

GX$root(config)# username newuser password myword

Configure Miscellaneous Parameters

If desired, the following miscellaneous parameters can be assigned:

! Set the hostname to Hub1-GX:

GX$root(config)# hostname Hub1-GX

Hub1-GX$root(config)#

! Set the SNMP read-only and read-write SNMP communities to public1 and private1, respectively:

GX$root(config)# snmp-server community public1 ro

GX$root(config)# snmp-server community private1 rw

! Set the time to 2:30 pm and the date to December 22, 2001 (you must first exit to the top level):

GX$root(config)# exit

GX$root# clock set 143000 22 12 2001

View and Save Running Configuration

To view the current configuration of the G10 CMTS, issue the following command:

GX$root# show running-config

To save the current configuration of the G10 CMTS, issue the following command. Upon booting up, the system uses the startup-config file to set the configuration:

GX$root# copy running-config startup-config

conf t can be used as an abbreviation for the configure terminal command.

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Configure a Downstream Channel

The procedure in this section specifies various parameters for downstream channel 0 of slot 1 / interface 0. The available downstream channels on a DOCSIS Module are channels 0–3, which always correspond to downstream ports 0–3, respectively, on the HFC Connector Module. Table 26 provides the valid ranges of all parameters specified in this section.

Table 26: Downstream Channel Parameter Ranges

1. Enter the interface cable submode:

GX$root# configure terminal

GX$root(config)# interface cable <slot/if>

2. Specify a frequency of 453000000 Hz for downstream channel 0:

GX$root(config-if-cslot/if)# cable downstream 0 frequency 453000000

3. Specify an RF power of 55 dBmV for downstream channel 0:

GX$root(config-if-cslot/if)# cable downstream 0 rf-power 55

4. Specify 64qam modulation for downstream channel 0:

GX$root(config-if-cslot/if)# cable downstream 0 modulation 64qam

5. Specify an interleave depth of 8 for downstream channel 0:

GX$root(config-if-cslot/if)# cable downstream 0 interleave-depth 8

6. At this point, if you desire to view the downstream channel 0 parameters and status, enter the following command:

GX$root(config-if-cslot/if)# cable downstream 0 show

Care should be taken when modifying any of the parameters associated with a downstream or upstream channel. Incorrect values specified for certain parameters can render a channel inoperative.

Parameter Range

slot 1–4, 10–13

interface 0–3

channel (=port) 0–3

frequency DOCSIS: 91000000 to 857000000EuroDOCSIS: 109000000 to 861000000

RF power 50 to 61

modulation 64qam or 256qam

interleave depth 8, 16, 32, 64, 128

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Initial Configuration of the G10 CMTS

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7. Enable downstream channel 0:

GX$root(config-if-cslot/if)# no cable downstream 0 shutdown

Configure an Upstream Channel

The procedure in this section specifies various parameters for upstream channel 0 of slot 1 / interface 0. A default modulation profile for channel 0 will be used. The available upstream channels on a DOCSIS Module are channels 0–7 or 0–15 (depending on the DOCSIS Module model), and are assigned to the four upstream ports (0–3) on the HFC Connector Module by default as defined in Table 24 on page 86. Table 27 provides the valid ranges of all parameters specified in this section.

Table 27: Upstream Channel Parameter Ranges

1. Enter the interface cable submode:

GX$root# configure terminal

GX$root(config)# interface cable <slot/if>

2. Specify a channel width of 200000 Hz for upstream channel 0:

GX$root(config-if-cslot/if)# cable upstream 0 channel-width 200000

3. Specify a frequency of 5000000 Hz for upstream channel 0:

GX$root(config-if-cslot/if)# cable upstream 0 frequency 5000000

4. Specify a power level of 0 dBmV for upstream channel 0:

GX$root(config-if-cslot/if)# cable upstream 0 power-level 0

Care should be taken when modifying any of the parameters associated with a downstream or upstream channel. Incorrect values specified for certain parameters can render a channel inoperative.

Parameter Range

slot 1–4, 10–13

interface 0–3

channel 0–7 or 0–15 (depending on the DOCSIS Module model)

port 0–3

channel width 200000–3200000 Hz

frequency DOCSIS: 5000000 to 42000000EuroDOCSIS: 5000000 to 65000000

power-level -10 to +25 dBmV

data-backoff 0–16

range-backoff 0–16

modulation-profile 1–256

minislot-size 2, 4, 8, 16, 32, 64, 128

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5. Specify start and stop data backoff values of 2 and 6, respectively, for upstream channel 0:

GX$root(config-if-cslot/if)# cable upstream 0 data-backoff 2 6

6. Specify start and stop range backoff values of 3 and 7, respectively, for upstream channel 0:

GX$root(config-if-cslot/if)# cable upstream 0 range-backoff 3 7

7. Specify a minislot size of 8 for upstream channel 0:

GX$root(config-if-cslot/if)# cable upstream 0 minislot-size 8

8. At this point, if you desire to view the upstream channel 0 parameters and status, enter the following command:

GX$root(config-if-cslot/if)# cable upstream 0 show

9. Enable upstream channel 0:

GX$root(config-if-cslot/if)# no cable upstream 0 shutdown

Configure Fast Ethernet Interfaces

The G10 CMTS is shipped with default values assigned to the Fast Ethernet interfaces. To view these defaults, issue the show running-config command. These defaults generally meet a user’s requirements and should not have to be modified.

The procedure in this section enables the two Fast Ethernet interfaces on a DOCSIS Module/HFC Connector Module pair:

1. Enter the interface fastEthernet submode:

GX$root# configure terminal

GX$root(config)# interface fastEthernet <slot/0>

2. Enable Fast Ethernet port 0:

GX$root(config-if-fslot/0)# no shutdown

3. Exit back to the configure terminal mode:

GX$root(config-if-fslot/0)# exit

4. Enter the interface fastEthernet submode:

GX$root(config)# interface fastEthernet <slot/1>

5. Enable Fast Ethernet port 1:

GX$root(config-if-fslot/1)# no shutdown

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Initial Configuration of the G10 CMTS

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Configure Gigabit Ethernet Interfaces

The procedure in this section enables the two Gigabit Ethernet interfaces on a NIC Module:

1. Enter the interface gigaEthernet submode:

GX$root# configure terminal

GX$root(config)# interface gigaEthernet <slot/0>

2. Enable Gigabit Ethernet port 0:

GX$root(config-if-gslot/0)# no shutdown

3. Exit back to the configure terminal mode:

GX$root(config-if-gslot/0)# exit

4. Enter the interface gigaEthernet submode:

GX$root(config)# interface gigaEthernet <slot/1>

5. Enable Gigabit Ethernet port 1:

GX$root(config-if-gslot/1)# no shutdown

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Configure Aggregate Links

This procedure configures an aggregate link using the two Gigabit Ethernet interfaces on a single NIC Module in slot 5. This example assumes that these interfaces are already enabled (as described in “Configure Gigabit Ethernet Interfaces” on page 92). The port-selection criterion is src-dst-mac-address, and minimum-links is set to 1.

1. Enter the interface aggEthernet submode and create aggregate link 0:

GX$root# configure terminal

GX$root(config)# interface aggEthernet 0

2. Select the port selection criterion for the link:

GX$root(config-if-a0)# port-selection src-dst-mac-address

3. Set the minimum number of links required to be up for the aggregate link to be considered operational:

GX$root(config-if-a0)# minimum-links 1

4. Add a description to the aggregate link:

GX$root(config-if-a0)# description “Aggregate Link 0”

5. Exit to the configure terminal mode and enter the interface gigaEthernet submode:

GX$root(config-if-a0)# exit

GX$root(config)# interface gigaEthernet 5/0

6. Add Gigabit port 0 to aggregate link 0:

GX$root(config-if-g5/0)# add-to aggEthernet 0

7. Exit to the configure terminal mode and enter the interface gigaEthernet submode:

GX$root(config-if-g5/0)# exit

GX$root(config)# interface gigaEthernet 5/1

8. Add Gigabit port 1 to aggregate link 0:

GX$root(config-if-g5/1)# add-to aggEthernet 0

9. Exit to the configure terminal mode and enter the interface aggEthernet submode:

GX$root(config-if-g5/1)# exit

GX$root(config)# interface aggEthernet 0

10. Enable aggregate link 0:

GX$root(config-if-a0)# no shutdown

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Initial Configuration of the G10 CMTS

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This procedure configures an aggregate link using two Gigabit Ethernet interfaces across two NIC Modules. This example assumes that these interfaces are already enabled (as described in “Configure Gigabit Ethernet Interfaces” on page 92). The port-selection criterion is src-dst-mac-address, and minimum-links is set to 1. By default, Gigabit port 1 on each NIC Module is used for stacking.

1. Enter the interface aggEthernet submode and create aggregate link 0:

GX$root# configure terminal

GX$root(config)# interface aggEthernet 0

2. Select the port selection criterion for the link:

GX$root(config-if-a0)# port-selection src-dst-mac-address

3. Set the minimum number of links required to be up for the aggregate link to be considered operational:

GX$root(config-if-a0)# minimum-links 1

4. Add a description to the aggregate link:

GX$root(config-if-a0)# description “Aggregate Link 0”

5. Exit to the configure terminal mode and enter the interface gigaEthernet submode:

GX$root(config-if-a0)# exit

GX$root(config)# interface gigaEthernet 5/0

6. Add Gigabit port 0 to aggregate link 0:

GX$root(config-if-g5/0)# add-to aggEthernet 0

7. Exit to the configure terminal mode and enter the interface gigaEthernet submode:

GX$root(config-if-g5/0)# exit

GX$root(config)# interface gigaEthernet 9/0

8. Add Gigabit port 0 to aggregate link 0:

GX$root(config-if-g9/0)# add-to aggEthernet 0

9. Exit to the configure terminal mode and enter the interface aggEthernet submode:

GX$root(config-if-g9/0)# exit

GX$root(config)# interface aggEthernet 0

10. Enable aggregate link 0:

GX$root(config-if-a0)# no shutdown

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Configuration and Operation

Initial Configuration of the G10 CMTS

95

Configure a Management Interface

A management interface is established by using the Fast Ethernet port labeled Eth0 on the Chassis Control Module. The following procedure describes how to configure this interface:

1. Enter the configure terminal mode:

GX$root# configure terminal

2. Assign an IP address of 192.177.122.3 for the default gateway for the management interface:

GX$root(config)# ip default-gateway 192.177.122.3 management

3. Enter the interface fastEthernet submode, specifying slot 6 and interface 0 for Fast Ethernet port 0:

GX$root(config)# interface fastEthernet 6/0

4. Assign an IP address of 192.177.122.1 and a subnet mask of 255.255.255.0 for slot 6 / interface 0:

GX$root(config-if-f6/0)# ip address 192.177.122.1 255.255.255.0

5. Enable Fast Ethernet port 0:

GX$root(config-if-f6/0)# no shutdown

Do not configure the Chassis Control Module management port on a 169.254/16 network. These IP addresses are used by the G10 CMTS internally, and any IP address clashes can result in unpredictable behavior.

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G10 CMTS Installation and Operation96

Configure Redundant Chassis Control Modules

To support Chassis Control Module redundancy, the software running on the primary Chassis Control Module (in slot 6) must be exactly the same version as the software running on the secondary Chassis Control Module (in slot 7). If the software versions are the same and both modules boot successfully, the G10 CMTS boots with Chassis Control Module redundancy enabled. No further configuration is necessary. This is the default configuration of the G10 CMTS as shipped from the factory.

If the software versions are different (because a secondary Chassis Control Module was installed in the system after the G10 CMTS was shipped from the factory), the software must be synchronized between the two modules and the CMTS must be rebooted to support redundancy. The synchronization is performed by the command request chassis ccm standby-cmm synchronize. This command synchronizes the software version (normal and upgrade) on the secondary module with the primary module.

See the G10 CMTS Functional Description and G-series CMTS CLI and SNMP Reference for more information regarding Chassis Control Module redundancy.

Following this procedure after initially booting up the CMTS with two Chassis Control Modules installed:

1. Check the version of software installed on the primary and secondary Chassis Control Modules:

GX$root# show version

If the version of software running on the two modules is exactly the same, no further configuation is necessary. If the versions are different, proceed to Step 2.

2. Synchronize the software version of the secondary module with the primary module after the next CMTS reboot:

GX$root# request chassis ccm standby-cmm synchronize

3. Reboot the CMTS:

GX$root# reload

The remaining sections of this chapter provide the CLI procedures used to perform various operational tasks on the G10 CMTS. See the G-series CMTS CLI and SNMP Reference for the groups and privileges used to implement security and user access in the CLI.

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Configuration and Operation

Management Tasks

97

Management Tasks

This section describes those tasks associated with initializing and managing the G10 CMTS.

Get Help

To display a list of available commands at the current command level, enter help or a question mark at the command prompt:

GX$root# help

GX$root# ?

Notice that a carriage return is not necessary when entering a question mark.

To display a list of valid command parameters, type a question mark after a command:

GX$root# clock ?

adjust - Adjust the system clock

set - Set the time and date

To display a list of available editing keystrokes, type help edit:

GX$root# help edit

Define Usernames, Passwords, and Privileges

To define new usernames and assign them passwords and privileges, you must have a group-privilege of ad-rw. Use the username command as follows:

GX$root# configure terminal

GX$root(config)# username newuser1 password newpw1

In the event the password for username root is lost, you can reset the password to the default of changme by performing the following procedure on the console port (not supported within a Telnet or secure shell session):

1. Reboot the CMTS by issuing the reload command or by power cycling the system.

2. When you see the following messages displayed on the console, type passwordreset:

Waiting for system to start-up ...

Waiting for completion of system initialization ...

3. When prompted, log into the CMTS as user root with a password of changeme.

To assign IP and read-write group-privilege to newuser1, use the username command as follows:

GX$root(config)# username newuser1 group ip privilege rw

To remove newuser1 from the system, use the no username command as follows:

GX$root(config)# no username newuser1

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G10 CMTS Installation and Operation98

Set the Clock and Date

To set the clock and date, use the clock command as follows:

GX$root# clock set 122200 22 12 2001

Sets the clock to 12:22:00 and the date to December 22, 2001. If the usage of the NTP server clock has been enabled, it must be disabled (by issuing the no clock ntp-server command) prior to manually setting or adjusting the clock with this command.

To adjust the clock, use the clock command as follows:

GX$root# clock adjust -60

Adjusts the clock 60 seconds backwards.

To configure an NTP server, use the clock ntp-server command as follows:

GX$root# configure terminal

GX$root(config)# clock ntp-server 192.168.201.1

The NTP server at IP address 192.168.201.1 is used for setting the CMTS system clock.

To define the timezone, use the clock timezone command as follows:

GX$root(config)# clock timezone PST 8

Defines PST as the timezone, and subtracts 8 hours from UTC. The specified timezone is arbitrary.

To define daylight savings time, use one of the two forms of the clock summer-time command as follows:

GX$root(config)# clock summer-time PDT date 7 apr 2 27 oct 2

The daylight savings time zone is named PDT and is set to begin on April 7 at 2 a.m. and end on October 27 at 2 a.m.

GX$root(config)# clock summer-time PDT recurring first sun apr 2 last sun oct 2

The daylight savings time zone is named PDT and is set to begin on the first Sunday of April at 2 a.m. and end on the last Sunday of October at 2 a.m. These start and end times are standard in the USA.

To display the UTC, local, and daylight savings times, as well as the IP address of the NTP server (if configured), use the clock show command as follows:

GX$root(config)# clock show

Set the Hostname

To define a hostname, you must have a group-privilege of ip-rw. Use the hostname command as follows:

GX$root# configure terminal

GX$root(config)# hostname CMTS5

CMTS5$root(config)#

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Configuration and Operation

RF Tasks

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Configure Banners

To define an incoming banner that is displayed when a user logs into the CMTS, use the banner incoming command as follows:

GX$root# configure terminal

GX$root(config)# banner login "Incoming Banner"

The banner displayed will be Incoming Banner:

Copyright (c) 2000-2002 Juniper Networks, Inc.

G10 CMTS Release 2.1.2.5

Incoming Banner

Login:

The banner exec, banner login, and banner motd commands can be issued in a similar fashion.

RF Tasks

This section describes those tasks associated with the RF functions of the G10 CMTS, such as dynamically adding and moving upstream channels, and configuring a modulation profile.

Add an Upstream Channel

The G10 CMTS allows upstream channels to be dynamically added to a slot/interface (MAC domain). This alleviates the need to split combining groups when a CMTS port reaches its maximum capacity.

1. Enter the interface cable submode:

GX$root# configure terminal

GX$root(config)# interface cable <slot/if>

2. Add channel 4:

GX$root(config-if-cslot/if)# cable upstream 4 add

3. Enable upstream channel 4:

GX$root(config-if-cslot/if)# no cable upstream 4 shutdown

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G10 CMTS Installation and Operation100

Move an Upstream Channel

The G10 CMTS allows upstream channels to be dynamically moved from one slot/interface to another.

1. Enter the interface cable submode, specifying slot 2 and interface 0:

GX$root# configure terminal

GX$root(config)# interface cable 2/0

2. Disable the upstream channel to be moved (channel 4):

GX$root(config-if-c2/0)# cable upstream 4 shutdown

3. Wait at least 30 seconds after disabling the channel.

4. Remove the channel from slot 2 / interface 0:

GX$root(config-if-c2/0)# no cable upstream 4 add

5. Enter the target slot/interface, specifying slot 2 and interface 1:

GX$root(config-if-c2/0)# exit

GX$root(config)# interface cable 2/1

6. Add channel 4 to slot 2 / interface 1:

GX$root(config-if-c2/1)# cable upstream 4 add

7. Enable upstream channel 4:

GX$root(config-if-c2/1)# no cable upstream 4 shutdown

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Configure an Upstream Modulation Profile

DOCSIS specifies different burst types, each associated with an Interval Usage Code (IUC), for upstream transmissions, such as request, initial, station, short, and long (see Table 28 on page 101). During a burst transmission, a CM must use the burst parameters assigned for that particular type of burst. These parameters are defined in an upstream modulation profile (see Table 29 on page 101). Upstream modulation profiles are assigned on a per upstream channel basis.

Table 28: Interval Usage Codes

Table 29: Upstream Modulation Profile Parameters

Specifying the upstream modulation profile parameters is accomplished by using the cable modulation-profile command. The order of the parameters specified in the command is given from top to bottom in the Parameter column of Table 29.

The cable upstream modulation-profile command is used to assign an upstream modulation profile to an upstream channel.

IUC Description

request An upstream interval in which requests can be made for bandwidth for upstream data transmission.

initial An interval in which new stations (cable modems) can join the network.

station An interval in which stations are expected to perform some aspect of routine network maintenance, such as ranging or power adjustment.

short An interval in which a CM transmits one or more upstream protocol data units (PDUs). The interval for a short interval is less than or equal to the Maximum Burst Size defined in the short profile.

long An interval in which a CM transmits one or more upstream protocol data units (PDUs). The number of mini-slots in the interval is larger than the maximum for short interval transmissions.

Parameter Range Description

FEC T bytes 0–10 The number of codeword parity bytes is 2*T (0 implies no FEC—forward error correction). T is the number of bytes that can be corrected per FEC codeword.

FEC K bytes 16–253 Codeword information bytes (not used if FEC T bytes is 0).

maxburst size 0–255 The maximum number of mini-slots that can be transmitted during this burst type.

guard time 0–255 Number of symbol times which must follow the end of this burst.

modulation 16qamqpsk

Upstream modulation type.

scrambler scrambler Determines if the scrambler is used.

scrambler seed 0–7FFF The 15-bit scrambler seed value.

diff encoding diffno-diff

Determines if differential encoding is used.

preamble length 0,2,4,...1024 – QPSK0,4,8,...1024 – 16QAM

Defines the length of the preamble in bits.

shortened last codeword fixedshortened

Determines whether the last codeword is shortened or not.

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G10 CMTS Installation and Operation102

Two of the IUCs—short and long—are used for the transmission of data to the CMTS. The burst parameters associated with these two particular IUCs significantly affect the efficiency of the upstream channel on which the CMs are transmitting, particularly the following parameters—FEC T bytes, FEC K bytes, modulation, preamble length, and shortened last codeword. In an environment with relatively low noise levels, an operator might specify the smallest number of FEC T bytes (or even turn off the FEC) and the largest number of FEC K bytes in order to minimize the overhead used for error checking. Using a modulation type of 16QAM, as opposed to QPSK, would approximately double the data bandwidth. Minimizing the preamble length and enabling shortened last codeword also increases the channel efficiency by reducing the amount of bits in a packet that are not used as part of the data payload.

However, in practice, an HFC plant might have higher levels of noise attributed to additive white gaussian noise, impulse noise, and narrowband ingress. Therefore, the burst parameters must be specified so that CMs can achieve a balance between maximizing the channel bandwidth, and successfully operating within a potentially noisy upstream environment.

The G10 CMTS is shipped from the factory with eight pre-defined modulation profiles. Three of these eight profiles—Profiles 1, 2, and 3—are recommended for your usage (see Table 30). The remaining five profiles—Profiles 4–8—are defined for laboratory purposes and are not suitable for real-world environments. To display a particular modulation profile, use the cable modulation-profile show command.

Table 30: Modulation Profiles 1, 2, and 3

The values within Table 30 are subject to change.

Profile IUCFEC T bytes

FEC K bytes

maxburstsize guardtime modulation scrambler

scramblerseed

diffencoding

preamblelength

shortenedlastcodeword

1

request 0 16 0 6 qpsk scrambler 1 diff 68 fixed

initial 3 34 0 5 qpsk scrambler 1 diff 52 fixed

station 3 34 0 5 qpsk scrambler 1 diff 52 fixed

short 5 75 8 5 qpsk scrambler 1 diff 32 shortened

long 8 220 0 5 qpsk scrambler 1 diff 32 shortened

2

request 0 16 0 5 16qam scrambler 1 diff 188 fixed

initial 3 34 0 5 16qam scrambler 1 diff 104 fixed

station 3 34 0 5 16qam scrambler 1 diff 104 fixed

short 5 75 8 5 16qam scrambler 1 diff 64 shortened

long 8 220 0 5 16qam scrambler 1 diff 64 shortened

3

request 0 16 0 6 qpsk scrambler 1 diff 68 fixed

initial 3 34 0 5 qpsk scrambler 1 diff 52 fixed

station 3 34 0 5 qpsk scrambler 1 diff 52 fixed

short 5 75 8 5 16qam scrambler 1 diff 64 shortened

long 8 220 0 5 16qam scrambler 1 diff 64 shortened

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Profile 1 is defined for full QPSK operation (QPSK modulation is used in all interval types). Profile 3 is defined for mixed 16QAM and QPSK operation in which 16QAM is used for short and long intervals, and QPSK is used for all other intervals. Profile 2 should be used in place of Profile 3 if it is known that the CMs on this channel do not transmit at the same power level for 16QAM and QPSK bursts.

The following procedure describes how to create a modulation profile and assign it to an upstream channel. In this example, a modulation profile ID of 15 (out of 256) is arbitrarily chosen. Table 31 provides the ten modulation profile parameters and the specific values used in the following procedure for each of the burst intervals.

Table 31: Modulation Profile Interval Parameters

1. Enter the configure terminal mode:

GX$root# configure terminal

2. Specify the parameters for a request interval for modulation profile 15:

GX$root(config)# cable modulation-profile 15 request 0 16 0 6 qpsk scrambler

1 diff 68 fixed

3. Specify the parameters for an initial maintenance interval for modulation profile 15:

GX$root(config)# cable modulation-profile 15 initial 3 34 0 5 qpsk scrambler

1 diff 52 fixed

4. Specify the parameters for a station maintenance interval for modulation profile 15:

GX$root(config)# cable modulation-profile 15 station 3 34 0 5 qpsk scrambler

1 diff 52 fixed

5. Specify the parameters for a short data grant interval for modulation profile 15:

GX$root(config)# cable modulation-profile 15 short 3 40 8 5 qpsk scrambler 1

diff 36 shortened

Care should be taken when modifying any of the parameters associated with a downstream or upstream channel. Incorrect values specified for certain parameters can render a channel inoperative.

IUCFEC T bytes

FEC K bytes

maxburstsize guardtime modulation scrambler

scramblerseed

diffencoding

preamblelength

shortenedlastcodeword

request 0 16 0 6 qpsk scrambler 1 diff 68 fixed

initial 3 34 0 5 qpsk scrambler 1 diff 52 fixed

station 3 34 0 5 qpsk scrambler 1 diff 52 fixed

short 3 40 8 5 qpsk scrambler 1 diff 36 shortened

long 3 100 0 5 qpsk scrambler 1 diff 36 shortened

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G10 CMTS Installation and Operation104

6. Specify the parameters for a long data grant interval for modulation profile 15:

GX$root(config)# cable modulation-profile 15 long 3 100 0 5 qpsk scrambler 1

diff 36 shortened

7. Assign a modulation profile of 15 for upstream channel 0:

GX$root(config)# interface cable <slot/if>GX$root(config-if-cslot/if)# cable upstream 0 modulation-profile 15

8. View modulation profile 15:

GX$root(config-if-cslot/if)# exitGX$root(config)# cable modulation-profile 15 show

ModId IUC prelen seed mod dif fec data/fec brst guard lstcw scrmb

1 request(1) 68 0x0001 QPSK Y 0 16 0 6 2 Y

1 reqdata(2) 68 0x0001 QPSK Y 3 40 8 6 2 Y

1 initial(3) 52 0x0001 QPSK Y 3 34 0 5 2 Y

1 station(4) 52 0x0001 QPSK Y 3 34 0 5 2 Y

1 short(5) 36 0x0001 QPSK Y 3 40 8 5 1 Y

1 long(6) 36 0x0001 QPSK Y 3 100 0 5 1 Y

Enable Upstream Multicast and Broadcast

To enable the echoing of IP multicast packets from the upstream channels in the targeted slot/if to the downstream channels in the currently-defined broadcast domain, use the cable ip-multicast-echo command as follows:

GX$root# configure terminal

GX$root(config)# interface cable <slot/if>GX$root(config-if-cslot/if)# cable ip-multicast-echo

Echo all IP multicast packets from the upstream channels in slot/if to the downstream channels in the broadcast domain.

To enable echoing of IP broadcast packets from the upstream channels in the targeted slot/if to the downstream channels in the currently-defined broadcast domain, use the cable ip-broadcast-echo command as follows:

GX$root(config-if-cslot/if)# cable ip-broadcast-echo

Echo all IP broadcast packets from the upstream channels in slot/if to the downstream channels in the broadcast domain.

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Configuration and Operation

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Create a Virtual Private Network

CPE devices behind a CM can be assigned to a cable Virtual Private Network (VPN) by the cable vpn command, or through provisioning by inclusion of a Juniper Networks TLV in the CM configuration file. The cable vpn command overrides any VPN provisioning through a CM configuration file.

Use the cable vpn command as follows:

GX$root# configure terminal

GX$root(config)# cable vpn 1234.5678.9ABC 601

Assigns the CM with the MAC address of 1234.5678.ABCD to VPN ID 601.

To assign CPE devices to a VPN through a CM configuration file, the information must be encoded in the vendor specific information field (VSIF) using the “Juniper Networks” vendor ID to specify which TLV tuples apply to Juniper Networks. The following example provides the TLV information to be included in a CM configuration file to assign a VPN ID of 601 decimal (all values below are in hexadecimal):

0x43 (VSIF) + 0x09 (Number of bytes in this VSIF)

0x08 (Vendor ID Type) + 0x03 (length) + 0x000304 (Juniper Networks Vendor ID)

0x01 (Vendor-specific Type) + 0x02 (length) + 0x0259 (VPN ID)

If you are editing the file as described in “Edit a CM Configuration File” on page 106, include the following simple TLV statement in the CM configuration file as follows:

VendorConfig = 0x08 0x03 0x00 0x03 0x04 0x01 0x02 0x02 0x59

The VSIF type (0x43) and length (0x09) are added to the binary configuration file by the CMTS when the file is created as described in “Create the Binary File” on page 113.

It is important to note that the mac-address specified in this command is the MAC address of the CM (not the MAC address of the CPE).

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G10 CMTS Installation and Operation106

Edit a CM Configuration File

This cable modem-config-file command allows you to display, convert (to ASCII), or create (from ASCII) a CM configuration file. The CM configuration file, which is downloaded to a CM by means of TFTP, consists of contiguous configuration parameters in the form of type/length/value (TLV), where:

! type is a single octet that defines the parameter.

! length is a single octet that defines the length of the value field (in octets).

! value contains the value of the parameter (one to 254 octets in length).

The type/length/value (TLV) type names defined in ASCII are provided in Table 32 on page 107. See the DOCSIS specifications for details regarding the TLV encodings.

All CM configuration files must include the following settings (the TLV type name from Table 32 is included parenthetically):

! Network Access Configuration Setting (NetworkAccessControl)

! CM MIC Configuration Setting (CmMic)

! CMTS MIC Configuration Setting (CmtsMic)

! End Configuration Setting (this is the end of data marker that signifies the end of the file)

! Either:

! DOCSIS 1.0 Class of Service Configuration Setting (ClassOfServiceConfig)

or

! Upstream Service Flow Configuration Setting (UpstreamServiceFlowEncoding)

! Downstream Service Flow Configuration Setting (DownstreamServiceFlowEncoding)

The CM MIC, CMTS MIC, and End configuration settings are generated by the G10 CMTS as a result of the cable modem-config-file generate-from-ascii command.

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Table 32: CM Configuration File TLV Type Names

TLV Type Name (Level 1) TLV Type Name (Level 2) TLV Type Name (Level 3)

DownstreamFrequency — —

UpstreamChannelId — —

NetworkAccessControl — —

ClassOfServiceConfig ClassId

MaxDownstreamRate

MaxUpstreamRate

UpstreamChannelPriority

GuaranteedUpstreamRate

MaxUpstreamBurst

PrivacyEnable

ModemCapabilities ConcatenationSupport

DocsisVersion

FragmentationSupport

PhsSupport

IgmpSupport

PrivacySupport

DownstreamSaidSupport

UpstreamSidSupport

FilteringSupport

TransmitEqualizationTapsPerSymbol

TransmitEqualizationTapsQuantity

DccSupport

CmMic — —

CmtsMic — —

VendorId — —

CmIpAddress — —

BaselinePrivacyConfig AuthWaitTimeout

ReauthWaitTimeout

AuthGraceTime

OperationalWaitTimeout

RekeyWaitTimeout

TekGraceTime

AuthRejectWaitTimeout

SaMapWaitTimeout

SaMapMaxRetries

MaxCpeQuantity — —

TftpTimestamp — —

ProvisionedIpAddress — —

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UpstreamClassificationEncoding ClassifierReference

ClassifierId

ServiceFlowReference

ServiceFlowId

RulePriority

ClassifierActivationState

IpPacketClassificationEncoding IpTosRangeAndMask

IpProtocol

IpSourceAddress

IpSourceMask

IpDestinationAddress

IpDestinationMask

TcpUdpSourcePortStart

TcpUdpSourcePortEnd

TcpUdpDestinationPortStart

TcpUdpDestinationPortEnd

EthernetPacketClassificationEncoding DestinationMacAddressAndMask

SourceMacAddress

EthertypeDsapMacType

Ieee8021PQPktClassificationEncoding UserPriority

VlanId

VendorSpecificClassifierParameters —

DownstreamClassificationEncoding ClassifierReference

ClassifierId

ServiceFlowReference

ServiceFlowId

RulePriority

ClassifierActivationState

IpPacketClassificationEncoding IpTosRangeAndMask

IpProtocol

IpSourceAddress

IpSourceMask

IpDestinationAddress

IpDestinationMask

TcpUdpSourcePortStart

TcpUdpSourcePortEnd

TcpUdpDestinationPortStart

TcpUdpDestinationPortEnd

EthernetPacketClassificationEncoding DestinationMacAddressAndMask

SourceMacAddress

EthertypeDsapMacType

Ieee8021PQPktClassificationEncoding UserPriority

VlanId

VendorSpecificClassifierParameters —

TLV Type Name (Level 1) TLV Type Name (Level 2) TLV Type Name (Level 3)

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UpstreamServiceFlowEncoding ServiceFlowReference

ServiceClassName

QosSetType

TrafficPriority

MaxSustainedTrafficRate

MaxTrafficBurst

MinReservedTrafficRate

MinReservedRatePacketSize

ActiveQosTimeout

AdmittedQosTimeout

MaxConcatenatedBurst

SchedulingType

RequestTransmissionPolicy

NominalPollingInterval

ToleratedPollJitter

UnsolicitedGrantSize

NominalGrantInterval

ToleratedGrantJitter

GrantsPerInterval

IpTosOverwrite

GrantTimeReference

VendorSpecificQosParameters

DownstreamServiceFlowEncoding ServiceFlowReference

ServiceClassName

QosSetType

TrafficPriority

MaxSustainedTrafficRate

MaxTrafficBurst

MinReservedTrafficRate

MinReservedRatePacketSize

ActiveQosTimeout

AdmittedQosTimeout

MaxLatency

VendorSpecificQosParameters

PayloadHeaderSuppressionEncoding ClassifierReference

ClassifierId

ServiceFlowReference

ServiceFlowIdentifier

DynamicServiceChangeAction

PhsField

PhsIndex

PhsMask

PhsSize

PhsVerification

VendorSpecificPhsParameters

MaxNumberOfClassifiers — —

TLV Type Name (Level 1) TLV Type Name (Level 2) TLV Type Name (Level 3)

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PrivacyEnable — —

SubscriberManagementControl — —

SubscriberManagementCpeIpTable — —

SubscriberManagementFilterGroups — —

VendorConfig — —

SoftwareUpgradeFilename — —

SnmpWriteAccessControl — —

SnmpMibObject — —

CpeMacAddress — —

SoftwareUpgradeTftpServerIpAddress — —

SnmpV3KickstartValue SecurityName

ManagerPublicNumber

TLV Type Name (Level 1) TLV Type Name (Level 2) TLV Type Name (Level 3)

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Convert to ASCII File

To convert a binary CM configuration file to an ASCII text file, issue the cable modem-config-file command as follows:

GX$root# cable modem-config-file to-ascii config1.cfg config1.txt

Converts the binary CM configuration file config1.cfg to an ASCII text CM configuration file config1.txt.

Within the ASCII text file, simple TLVs are specified as:

simple-tlv-type-name = <value>

Numeric values can be specified in decimal or hexadecimal (hexadecimal values must be prepended with 0x):

DownstreamFrequency = 62500 orDownstreamFrequency = 0xF424

IP address values can be specified in standard dot-quad notation, in decimal, or hexadecimal (hexadecimal values must be prepended with 0x). Sequences of IP addresses can be separated by spaces or commas:

SubscriberManagementCpeIpTable = 192.168.129.1 192.168.129.2

String values must be enclosed in quotes:

SoftwareUpgradeFilename = “upgrade5“

Sequence values can be specified in decimal or hexadecimal (hexadecimal values must be prepended with 0x), and can be separated by spaces or commas:

VendorId = 0x00 0x01 0x02

Single-line comments are signified by the usage of # as the first non-blank character on a line. A commented line is ignored during the conversion of an ASCII text file to a binary configuration file.

Composite TLVs are specified as a list of simple and composite TLVs (the indentation of types is not required, but is recommended for readability):

composite-tlv-type-name {simple-tlv-type-name = <value> simple-tlv-type-name = <value>..composite-tlv-type-name {

simple-tlv-type-name = <value> simple-tlv-type-name = <value>..}

}

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Following is an example of a binary CM configuration file converted to an ASCII text file:

DownstreamFrequency = 62500

UpstreamChannelId = 1

NetworkAccessControl = 1

ModemCapabilities {

ConcatenationSupport = 0

DocsisVersion = 0

FragmentationSupport = 0

PhsSupport = 0

IgmpSupport = 0

PrivacySupport = 0

DownstreamSaidSupport = 0

UpstreamSidSupport = 0

FilteringSupport = 0

DccSupport = 1

}

VendorId = 0x00 0x01 0x02

CmIpAddress = 192.167.138.5

BaselinePrivacyConfig {

AuthWaitTimeout = 1

ReauthWaitTimeout = 1

AuthGraceTime = 1

OperationalWaitTimeout = 1

RekeyWaitTimeout = 1

TekGraceTime = 1

AuthRejectWaitTimeout = 1

}

MaxCpeQuantity = 1

TftpTimestamp = 123455

ProvisionedIpAddress = 192.168.5.67

UpstreamClassificationEncoding {

ClassifierReference = 1

ServiceFlowReference = 1

RulePriority = 3

ClassifierActivationState = 0

}

DownstreamServiceFlowEncoding {

ServiceFlowReference = 3

QosSetType = 7

TrafficPriority = 0

}

UpstreamServiceFlowEncoding {

ServiceFlowReference = 1

QosSetType = 1

TrafficPriority = 3

SchedulingType = 2

AdmittedQosTimeout = 0

ActiveQosTimeout = 0

}

PrivacyEnable = 1

SubscriberManagementCpeIpTable = 192.167.139.1 192.167.139.2

192.167.139.3

SoftwareUpgradeFilename = "upgrade5"

SoftwareUpgradeTftpServerIpAddress = 192.45.67.89

SnmpV3KickstartValue {

SecurityName = "LOW SECURITY"

ManagerPublicNumber = 0x02 0xe8 0xff 0xbf 0x20 0x20 0x20

}

SnmpV3KickstartValue {

SecurityName = "HIGH SECURITY"

ManagerPublicNumber = 0x19 0xe8 0xff 0xbf 0x20 0x20 0x20

}

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CpeMacAddress = 0x01 0x02 0x03 0x04 0x05 0x06

# CmMic = 0x18 0x32 0xd1 0x2a 0x6c 0xfe 0xf4 0xbd 0x99 0xbf 0x56 0xb6

0x24 0x8e 0xbd 0x67

# CmtsMic = 0x5b 0xf1 0x9f 0x1a 0xa6 0x58 0xe9 0x38 0x0e 0x3f 0xf3

0x12 0xc7 0xeb 0x05 0x82

Edit the ASCII File

To edit the ASCII text file, used the edit command as follows:

GX$root# edit config1.txt

Create the Binary File

To convert the ASCII text file to a binary CM configuration file, issue the cable modem-config-file command as follows:

GX$root# cable modem-config-file generate-from-ascii config1.txt config1.cfg

Converts the ASCII text CM configuration file config1.txt to a binary CM configuration file config1.cfg.

Display the Binary File

To display a binary CM configuration file, issue the cable modem-config-file command as follows:

GX$root# cable modem-config-file show config1.cfg

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NSI Tasks

This section describes those tasks associated with the Network Side Interface (NSI) functions of the G10 CMTS, such as configuring DHCP and SNMP server parameters.

DHCP Server Parameters

The CLI is used to configure the CMTS with various parameters associated with the Dynamic Host Control Protocol (DHCP):

! The cable dhcp-giaddr and the giaddr commands are used to specify both the IP address for the associated cable interface as well as the IP address to be used as the GIADDR when relaying DHCP requests. The GIADDR configured for a cable interface is owned by the CMTS. This enables the CMTS to directly receive the DHCP message responses sent by the DHCP server. The CMTS will respond to ARP requests for this IP address.

Multiple GIADDRs (up to 16) can be configured for the CPE devices, in which case the relay agent uses a round robin algorithm to assign the GIADDR address to CPE device DHCP Discover/Request messages. Multiple GIADDRs are configured to distribute the CPE devices evenly within all the multiple subnets behind a single cable interface.

! The cable helper-address and the helper-address commands are used to specify the IP address of the DHCP server. If the DHCP server is not on a directly-attached subnet to the Fast Ethernet port to which the DHCP traffic is being forwarded, the next-hop parameter must also be specified.

! The cable relay-agent-option and relay-agent-option commands are used to enable the CMTS to insert DHCP relay information in DHCP-Bootrequest messages forwarded by a CM or CPE to DHCP servers. Specifically, the CMTS inserts the 48-bit MAC address of the CM in the "DHCP Relay Agent Information Option, sub-option Agent Circuit ID" (option 82) field. The DHCP server uses this address and the one in the DHCP-Bootrequest message to determine if the original request came from a CM or CPE.

! The cable subscriber-group command is used to define a subscriber group.

To avoid potential issues with network side equipment, we recommend that you assign different subnet GIADDRs to different cable interfaces.

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Subscriber Groups

A subscriber group is a collection of CMs and CPEs. All CMs and CPEs that reside in the same subscriber group use the DHCP-related parameters assigned while in the subscriber group submode. These parameters are assigned with the subscriber group submode commands dhcp-giaddr, helper-address, and relay-agent-option. The basic underlying functionality of these commands is the same as the cable dhcp-giaddr, cable helper-address, and cable relay-agent-option commands, respectively.

Any DHCP configuration performed at the interface cable submode level applies to what is known as the default subscriber group for that cable interface.

Every subscriber group created on a cable interface must be assigned a cable modem GIADDR, and the IP address used must be from the same subnet assigned to the CMs in that subscriber group.

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DHCP Server Configurations

This section presents three different DHCP server configurations that can be used to distinguish between CM and CPE DHCP-Bootrequest messages, and the CLI command sequence used to support these configurations.

1. In this configuration, assume a DHCP server is configured to distinguish between CMs and CPEs through the relay agent option (option 82). The G10 CMTS will broadcast all CM and CPE broadcast DHCP-Bootrequest messages from slot/if to the network using the relay agent option (see “DHCP-Bootrequest Broadcasting” on page 116 for more information).

GX$root# configure terminal

GX$root(config)# interface cable <slot/if>GX$root(config-if-cslot/if)# cable relay-agent-option

2. In this configuration, assume the same DHCP server is used for CMs and CPEs, but the distinction between them is made by assigning different GIADDRs for CMs and CPEs. The G10 CMTS will broadcast all CM and CPE broadcast DHCP-Bootrequest messages from slot/if to the network using their respective GIADDRs (see “DHCP-Bootrequest Broadcasting” on page 116 for more information).

GX$root# configure terminal

GX$root(config)# interface cable <slot/if>GX$root(config-if-cslot/if)# cable dhcp-giaddr 10.0.0.1 cable-modemGX$root(config-if-cslot/if)# cable dhcp-giaddr 172.0.0.1 host

3. This configuration is similar to the previous one in that different GIADDRs are assigned for CMs and CPEs. Moreover, one DHCP server is dedicated to CMs, and another is dedicated to CPEs. The G10 CMTS will forward all CM and CPE broadcast DHCP-Bootrequest messages from slot/if as unicast messages to the DHCP servers at IP addresses 192.168.6.101 and 192.168.6.103, respectively, using their respective GIADDRs.

GX$root# configure terminal

GX$root(config)# interface cable <slot/if>GX$root(config-if-cslot/if)# cable dhcp-giaddr 10.0.0.1 cable-modemGX$root(config-if-cslot/if)# cable dhcp-giaddr 172.0.0.1 hostGX$root(config-if-cslot/if)# cable helper-address 192.168.6.101 cable-modemGX$root(config-if-cslot/if)# cable helper-address 192.168.6.103 host

DHCP-Bootrequest Broadcasting

A CM broadcast DHCP-Bootrequest message is forwarded by the G10 CMTS relay agent to all subscriber groups configured on the associated cable interface, including the default subscriber group. One and only one subscriber group should respond to provision the CM with an IP address from the pool of addresses belonging to that group. Responses from more than one subscriber group can lead to unpredictable IP address assignment. When the CM has successfully been assigned an IP address from the DHCP server response, the G10 CMTS relay agent records the association between the CM and its subscriber group. Thereafter, a CPE broadcast DHCP-Bootrequest message is forwarded as a unicast message by the G10 CMTS relay agent only to the associated CM’s subscriber group that was recorded during the CM’s registration.

If a CM’s subscriber group is deleted by the operator, the CM is made part of the default subscriber group for its cable interface. All CPE broadcast DHCP-Bootrequest messages are then handled based on the configuration for the default subscriber group.

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DHCP Provisioning Scenarios

This section provides four different provisioning scenarios that apply to supporting multiple subscriber groups, where a subscriber group can correspond to an Internet Service Provider (ISP).

1. This scenario assumes that two ISPs on a cable interface share a single DHCP server on a subnet different than the subnet of the Fast Ethernet port associated with this cable interface. The ISPs use different subnets from each other, and use different subnets for CMs and CPEs.

Configuration:

Common DHCP server IP address: 192.168.23.45

ISP1 next hop IP address: 10.22.3.1ISP1 CM subnet: 10.22.3.4ISP1 CPE subnet: 172.17.18.1

ISP2 next hop IP address: 10.22.4.1ISP2 CM subnet: 10.22.4.4ISP2 CPE subnet: 162.15.14.1

GX$root# configure terminal

GX$root(config)# interface cable <slot/if>GX$root(config-if-cslot/if)# cable subscriber-group ISP1GX$root(config-if-cslot/if-sgrp)# helper-address 192.168.23.45 10.22.3.1GX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 10.22.3.4 cable-modemGX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 172.17.18.1 hostGX$root(config-if-cslot/if-sgrp)# exitGX$root(config-if-cslot/if)# cable subscriber-group ISP2GX$root(config-if-cslot/if-sgrp)# helper-address 192.168.23.45 10.22.4.1GX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 10.22.4.4 cable-modemGX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 162.15.14.1 host

2. This scenario assumes that two ISPs on a cable interface use a different DHCP server on a subnet different than the subnet of the Fast Ethernet port associated with this cable interface. The ISPs use different subnets from each other, and use different subnets for CMs and CPEs.

Configuration:

ISP1 DHCP server IP address: 192.16.2.4ISP1 next hop IP address: 10.22.3.1ISP1 CM subnet: 10.22.3.4ISP1 CPE subnet: 172.17.18.1

ISP2 DHCP server IP address: 192.17.3.7ISP2 next hop IP address: 10.22.4.1ISP2 CM subnet: 10.22.4.4ISP2 CPE subnet: 162.15.14.1

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GX$root# configure terminal

GX$root(config)# interface cable <slot/if>GX$root(config-if-cslot/if)# cable subscriber-group ISP1GX$root(config-if-cslot/if-sgrp)# helper-address 192.16.2.4 10.22.3.1GX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 10.22.3.4 cable-modemGX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 172.17.18.1 hostGX$root(config-if-cslot/if-sgrp)# exitGX$root(config-if-cslot/if)# cable subscriber-group ISP2GX$root(config-if-cslot/if-sgrp)# helper-address 192.17.3.7 10.22.4.1GX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 10.22.4.4 cable-modemGX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 162.15.14.1 host

3. This scenario assumes that two ISPs on a cable interface use different DHCP servers on a subnet different than the subnet of the Fast Ethernet port associated with this cable interface. The ISPs use different subnets from each other, and ISP2 uses different subnets for CMs and CPEs. ISP1 uses the relay agent option to distinguish between CMs and CPEs, whereas ISP2 uses a different DHCP server for CMs and CPEs. Furthermore, ISP2 wants to assign all CPEs on the cable interface across multiple CPE subnets.

Configuration:

ISP1 DHCP server IP address: 192.16.2.4ISP1 next hop IP address: 10.22.3.1ISP1 CM and CPE subnet: 10.22.3.4ISP1 uses relay agent option

ISP2 CM DHCP server IP address: 192.17.3.7ISP2 CM next hop IP address: 10.22.4.1ISP2 CPE DHCP server IP address: 192.17.3.8ISP2 CPE next hop IP address: 162.15.14.1ISP2 CM subnet: 10.22.4.4ISP2 CPE subnets: 162.15.14.6, 162.16.14.6, 162.17.14.6

GX$root# configure terminal

GX$root(config)# interface cable <slot/if>GX$root(config-if-cslot/if)# cable subscriber-group ISP1GX$root(config-if-cslot/if-sgrp)# helper-address 192.16.2.4 10.22.3.1GX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 10.22.3.4GX$root(config-if-cslot/if-sgrp)# relay-agent-optionGX$root(config-if-cslot/if-sgrp)# exitGX$root(config-if-cslot/if)# cable subscriber-group ISP2GX$root(config-if-cslot/if-sgrp)# helper-address 192.17.3.7 10.22.4.1 cable-modem

GX$root(config-if-cslot/if-sgrp)# helper-address 192.17.3.8 162.15.14.1 hostGX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 10.22.4.4 cable-modemGX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 162.15.14.6 hostGX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 162.16.14.6 hostGX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 162.17.14.6 host

In this scenario, the GIADDRs 162.15.14.6, 162.16.14.6, and 162.17.14.6 are used by the G10 CMTS relay agent in a round robin algorithm to assign the GIADDRs to CPE device DHCP Discover/Request messages for ISP2.

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4. This scenario assumes that there are two ISPs on a cable interface. ISP1 uses the relay agent option to broadcast DHCP-Bootrequest messages and to distinguish between CMs and CPEs. ISP1 specifies a GIADDR only for CMs. ISP2 uses a different DHCP server for CMs and CPEs. These servers reside on a subnet different than the subnet of the Fast Ethernet port associated with this cable interface. ISP2 uses different subnets for CMs and CPEs.

Configuration:

ISP1 CM subnet: 10.22.3.4ISP1 uses relay agent option

ISP2 CM DHCP server IP address: 192.17.3.7ISP2 CM next hop IP address: 10.22.4.1ISP2 CPE DHCP server IP address: 192.17.3.8ISP2 CPE next hop IP address: 162.15.14.1ISP2 CM subnet: 10.22.4.4ISP2 CPE subnets: 162.15.14.6

GX$root# configure terminal

GX$root(config)# interface cable <slot/if>GX$root(config-if-cslot/if)# cable subscriber-group ISP1GX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 10.22.3.4GX$root(config-if-cslot/if-sgrp)# relay-agent-optionGX$root(config-if-cslot/if-sgrp)# exitGX$root(config-if-cslot/if)# cable subscriber-group ISP2GX$root(config-if-cslot/if-sgrp)# helper-address 192.17.3.7 10.22.4.1 cable-modem

GX$root(config-if-cslot/if-sgrp)# helper-address 192.17.3.8 162.15.14.1 hostGX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 10.22.4.4 cable-modemGX$root(config-if-cslot/if-sgrp)# dhcp-giaddr 162.15.14.6 host

Shared Secret

To specify a shared secret, which is an authentication string that is shared between a server that provides a cable modem’s configuration file and the CMTS, use the cable shared-secret command as follows:

GX$root# configure terminal

GX$root(config)# cable shared-secret mysecret

The shared secret authentication string is mysecret.

A shared secret can be specified as an encrypted string:

GX$root(config)# cable shared-secret 977071536c2ea956 encrypted

The encrypted shared secret authentication string for the entire CMTS is 977071536c2ea956.

A shared secret can also be specified on a cable interface basis:

GX$root(config)# interface cable <slot/if>GX$root(config-if-cslot/if)# cable shared-secret int1secret

The shared secret authentication string for slot/if is int1secret.

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SNMP Server Parameters

To specify the read-write and read-only SNMP communities, use the snmp-server community command as follows:

GX$root# configure terminal

GX$root(config)# snmp-server community private1 rw

Establishes private1 as the read-write SNMP community.

GX$root(config)# snmp-server community public1 ro

Establishes public1 as the read-only SNMP community.

To specify the destination host(s) that will receive SNMP traps, use the snmp-server host command as follows:

GX$root(config)# snmp-server host 205.15.128.132 version 2c

Specify an IP address of 205.15.128.132 for the SNMP server. The SNMP version that will be used to send traps is 2c. The UDP port to which traps will be sent on this host is 162.

The snmp-server host command specifies the destination hosts that will receive SNMPv1 and SNMPv2c traps from the CMTS. Up to 10 SNMPv1 and up to 10 SNMPv2c destinations can be specified. An alternative way to specify trap destinations for SNMPv1, SNMPv2c, and SNMPv3 is to use the SNMP-TARGET-MIB tables. Those tables are distinct from the tables acted upon by the snmp-server host command. To avoid confusion, it might be advantageous to set up SNMP trap destination hosts either via the SNMP-TARGET-MIB tables or the snmp-server host command, but not both.

Domain Name Server Address

To specify the IP address of a domain name system (DNS) server, use the ip name-server command as follows:

GX$root# configure terminal

GX$root(config)# ip name-server 192.16.90.1

GX$root(config)# ip name-server 192.16.90.2

Adds the DNS servers at addresses 192.16.90.1 and 192.16.90.2. The CMTS will then consult these addresses, in that order, when resolving a host name.

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Authentication Server Configuration

The G10 CMTS provides RADIUS and TACACS+ client support to remote user authentication servers. If remote authentication is enabled and the authentication servers do not respond, the CMTS uses the local password database (unless the optional no-local-fallback parameter is specified in the remote-authentication command). Up to three RADIUS servers or ten TACACS+ servers can be specified.

The following procedure enables remote user authentication and specifies a RADIUS server at IP address 192.168.100.101 with a shared secret of DOCSIS. The default values for port, retry, and timeout are used by the RADIUS client during authentication (see the radius-server host command in the G-series CMTS CLI and SNMP Reference for more details). If the RADIUS server does not respond, the local password database will be used for authentication.

GX$root# configure terminal

GX$root(config)# system

GX$root(config-system)# remote-authentication radius

GX$root(config-system)# radius-server host 192.168.100.101 secret DOCSIS

The following procedure enables remote user authentication and specifies a TACACS+ server at IP address 192.168.100.101 with a shared secret of DOCSIS. The default value for timeout is used by the TACACS+ client during authentication (see the tacacs-server host command in the G-series CMTS CLI and SNMP Reference for more details). If the TACACS+ server does not respond, the local password database will not be used for authentication (because the no-local-fallback parameter is specified in the remote-authentication command).

GX$root# configure terminal

GX$root(config)# system

GX$root(config-system)# remote-authentication tacacs no-local-fallback

GX$root(config-system)# tacacs-server host 192.168.100.101 key DOCSIS

Configure Juniper Networks-Specific RADIUS Attributes

The G10 CMTS supports the configuration of Juniper Networks-specific RADIUS attributes. These attributes are known as vendor-specific attributes and are described in RFC 2138, Remote Authentication Dial In User Service (RADIUS). These Juniper Networks-specific attributes are encapsulated in a RADIUS vendor-specific attribute with the vendor ID set to the Juniper Networks ID number, 2636. Table 33 lists the Juniper Networks-specific attributes you can configure.

Table 33: Juniper Networks–Specific RADIUS Attributes

Name Description Type Length String

cmts-access-string Assigns the user groups and privileges as defined in the privilege matrix. The fs-rw and bi-rw group-privileges are important if using ftp, sftp, or scp to retrieve files from the CMTS. If the cmts-access-string is not defined for a remotely authenticated user, the user will have minimal privileges (ip-ro, ad-ro, and rf-ro). The exception is the root user who is given root privileges.

6 ≥5 The format is a list of group-privileges separated by commas. The permissible privileges are: ip-ro, ip-rd, ip-rw, fs-ro, fs-rw, ad-ro, ad-rd, ad-rw, rf-ro, rf-rd, rf-rw, bi-rw.

cmts-user-prompt Sets the user prompt for the CLI. If not defined for a remotely authenticated user, the username becomes the prompt.

7 1–15 One through 15 octets containing printable ASCII characters.

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Configure Juniper Networks-Specific TACACS+ Attributes

The Juniper Networks-specific attributes listed in Table 33 also apply to TACACS+. They are specified in the TACACS+ server configuration file on a per-user basis. The G10 CMTS retrieves these attributes through an authorization request of the TACACS+ server after authenticating a user.

To specify these attributes, include a service statement in the TACACS+ server configuration file of the following form:

service = junos-exec {cmts-access-string = “<cmts-access-string>”cmts-user-prompt = “<cmts-user-prompt>”

}

This service statement can appear in a user or group statement.

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Configuration and Operation

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File and Directory Management

To display a directory, use either the dir command or the ls command as follows:

GX$root> dir /home

GX$root> ls /home

Each of these two commands displays the contents of the directory home.

To display the root directory, use either the dir command or the ls command as follows:

GX$root> dir /

GX$root> ls /

Each of these two commands displays the contents of the directory root.

To display the current directory, use the pwd command as follows:

GX$root> pwd

To change the current directory, use the cd command as follows:

GX$root> cd temp

The command prompt location is changed to the temp directory using a relative path. The temp directory must be under the current location.

GX$root> cd /home/temp

The command prompt location is changed to the temp directory using an absolute path.

Use the mkdir command to create a new directory as follows:

GX$root# cd /samples/data

GX$root# mkdir logs

Creates a new directory named logs in the path sample/data.

Use the rmdir command to delete a directory as follows:

GX$root# rmdir /logs

Deletes the directory named logs in the current path.

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G10 CMTS Installation and Operation124

Configuration Management

To view the current configuration of the G10 CMTS, issue the following command:

GX$root# show running-config

To save the current configuration of the G10 CMTS, issue the following command. Upon booting up, the system uses the startup-config file to set the configuration:

GX$root# copy running-config startup-config

To store all persistent configuration data—including the user database, the CLI configuration, and the SNMPv3 configuration—use the system config-backup command as follows:

GX$root# system config-backup mycfg.cli

Saves the current configuration in mycfg.cli in the current directory.

To restore a previously-saved configuration, use the system restore-backup command as follows:

GX$root# system restore-backup mycfg.cli

Restores the CMTS to the configuration defined in mycfg.cli after the next reboot.

Ping and Traceroute

Use the ping command at the top level to ping an IP address as follows:

GX$root> ping 100.205.50.150

Verifies the connection between the CMTS and the device at IP address 100.205.50.150.

To trace a connection to a specified IP address, use the traceroute command as follows:

GX$root> traceroute 172.164.70.13

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125

Part 2Troubleshooting and Maintenance

! RF Measurements on page 127

! Troubleshooting on page 135

! Maintenance and Upgrades on page 157

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RF Measurements 127

Chapter 5RF Measurements

This chapter provides the procedures for measuring the downstream and upstream RF signals of a DOCSIS Module using a spectrum analyzer. These procedures can be followed immediately after the initial installation and configuration of the G10 CMTS to ensure the system is configured and operating properly. In addition, these procedures can assist with the diagnosis of RF issues that are detected by spectrum monitoring applications such as the ServiceGuard Management System (see “ServiceGuard Management System” on page 146).

The following procedures assume the use of a Hewlett Packard HP8591C CATV Analyzer, but any equivalent spectrum analyzer will suffice.

Downstream RF Measurement in CATV Mode

This section describes the procedure for measuring the downstream signal power from the G10 CMTS using CATV mode on the HP8591C CATV Analyzer. If your spectrum analyzer does not support CATV mode, you can use the SPECTRUM ANALYZER mode as described in “Downstream RF Measurement in Spectrum Analyzer Mode” on page 129.

1. Connect the spectrum analyzer to a cable within the plant that carries the downstream signal you are measuring. The signal originates from one of the downstream ports of the HFC Connector Module (DS 0 through DS 3).

2. View (or set) the output RF power level of the specific channel to be measured. In this example, the output RF power level for channel 0 is set to 61 dBmV. The power specified in the cable downstream rf-power command can be viewed by issuing the show running-config command, or alternatively by using SNMP.

G10$root# show running-config interface cable <slot/if>

continued...interface

cable 1/0 cable downstream 0 channel-width 6000000 cable downstream 0 frequency 531000000 cable downstream 0 interleave-depth 8 cable downstream 0 modulation 64qam cable downstream 0 rf-power 61 no cable downstream 0 shutdown

continued...

This command displays the current configuration. Look for the channel downstream <channel> rf-power <power-level> output to determine the power level specified for the downstream channel.

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To set the output RF power level, use the cable downstream rf-power command as follows:

G10$root# configure terminal

G10$root(config)# interface cable <slot/if>G10$root(config-if-cslot/if)# cable downstream 0 rf-power 61

3. Press the MODE key and set the spectrum analyzer to CABLE TV ANALYZER mode.

4. Select CHANNEL MEAS (channel measurement) and enter the desired channel number. In this example, channel 75 is selected, which corresponds to a center frequency of 531 MHz.

5. Navigate to the third menu on the screen and select DIGITAL POWER. The spectrum analyzer display should be similar to the display in Figure 32.

6. Ensure that the DIGITAL CHANNEL POWER shown at the bottom of the display is approximately equal to the set downstream power level, minus any attenuation between the HFC Connector Module downstream port and the point at which your measurement is taken in the cable plant. In this example, the attentuation between the CMTS and the measurement point was approximately 13 dB. Therefore, the expected measured value should be approximately 48 dBmV.

Figure 32: Downstream RF Signal (CATV Mode)

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Downstream RF Measurement in Spectrum Analyzer Mode

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Downstream RF Measurement in Spectrum Analyzer Mode

This section describes the procedure for measuring the downstream signal power from the G10 CMTS using the SPECTRUM ANALYZER mode on the HP8591C CATV Analyzer.

1. Connect the spectrum analyzer to a cable within the plant that carries the downstream signal you are measuring. The signal originates from one of the downstream ports of the HFC Connector Module (DS 0 through DS 3).

2. View (or set) the output RF power level of the specific channel to be measured. In this example, the output RF power level for channel 0 is set to 61 dBmV. The power specified in the cable downstream rf-power command can be view by issuing the show running-config command, or alternatively by using SNMP.

G10$root# show running-config interface cable <slot/if>

continued...interface

cable 1/0 cable downstream 0 channel-width 6000000 cable downstream 0 frequency 531000000 cable downstream 0 interleave-depth 8 cable downstream 0 modulation 64qam cable downstream 0 rf-power 61 no cable downstream 0 shutdown

continued...

This command displays the current configuration. Look for the channel downstream <channel> rf-power <power-level> output to determine the power level specified for the downstream channel.

To set the output RF power level, use the cable downstream rf-power command as follows:

G10$root# configure terminal

G10$root(config)# interface cable <slot/if>G10$root(config-if-cslot/if)# cable downstream 0 rf-power 61

3. Press the MODE key and set the spectrum analyzer to SPECTRUM ANALYZER mode.

4. Press the FREQUENCY key and enter the desired frequency. In this example, 531 MHz is entered.

5. Press the SPAN key and enter 6 MHz.

6. Press the BW key and turn video averaging on by selecting VID AVG ON. The default number of averages is 100. The number of averages can be changed by using the numeric keypad.

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G10 CMTS Installation and Operation130

7. Press the MKR FCTN key (marker function) and select MK NOISE ON. This sets the spectrum analyzer to read out the power bandwidth, normalized to 1 Hz. The spectrum analyzer display should be similar to the display in Figure 33 on page 130.

8. The power shown on the display in Figure 33—shown in two places, on the top/right and middle/left—is –19.12 dBmV, at 1 Hz. In order to obtain the power in the 6 MHz channel, a correction factor is required. This correction factor equals 10 log(ChannelBW/measurementBW). In this case, 10 log (6x10^6/1) equals 67.78 dB. Therefore, the actual downstream channel power equals (-19.12+67.78), which equals 48.66 dBmV. Ensure that this power value is approximately equal to the set downstream power level, minus any attenuation between the HFC Connector Module downstream port and the point at which your measurement is taken in the cable plant. In this example, the attentuation between the CMTS and the measurement point was approximately 13 dB. Therefore, the expected measured value should be approximately 48 dBmV.

Figure 33: Downstream RF Signal (Spectrum Analyzer Mode)

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Upstream RF Measurement

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Upstream RF Measurement

This section describes the procedure for measuring an upstream signal to the G10 CMTS using zero span mode on the HP8591C CATV Analyzer.

1. Connect the spectrum analyzer to a cable within the plant that carries the upstream signal(s) you are measuring. The signals are received on one of the upstream ports of the HFC Connector Module (US 0 through US 3).

2. Press the FREQ key and enter the center frequency that corresponds to the upstream frequency you are measuring. In this example, the upstream frequency is 9 MHz. The upstream channel frequency can be viewed by issuing the show running-config CLI command, or alternatively by using SNMP.

G10$root# show running-config interface cable <slot/if>

continued...cable upstream 0 channel-width 1600000cable upstream 0 data-backoff 3 10cable upstream 0 frequency 9000000cable upstream 0 minislot-size 8

continued...

This command displays the current configuration. Look for the channel upstream <channel> frequency <frequency> output to determine the frequency specified for the upstream channel.

3. Press the SPAN key and enter 0 MHz (or select ZERO SPAN). This sets the spectrum analyzer to zero span mode, where signals will be displayed in the time domain.

4. Press the BW key (Bandwidth), select RES BW MAN (Resolution Bandwidth Manual), and enter 3 MHz.

5. While in the BW key menu, select VID BW MAN (Video Bandwidth Manual), and enter 3 MHz.

6. Press the AMPLITUDE key, select ATTEN MAN (Attenuation Manual), and enter 0 dB. This removes all internal spectrum analyzer attenuation.

7. While still in the AMPLITUDE screen, select REF LVL (Reference Level), and enter a value slightly greater than the maximum power level you are expecting. The reference level is the power represented by the top graticule line in the display. In this example, the reference level is set to 5 dBmV.

8. Select SCALE and adjust the scale so that the signal spans the entire Y-axis of the display.

9. Press the TRIG key (Trigger), select VIDEO, and adjust the trigger line to within one graticule of the peak of the signal.

DOCSIS specifies that cable modems use TDMA (time division multiple access) for upstream transmissions, which means that cable modems are not continuously transmitting. In order to facilitate the triggering and capture of upstream signals, the cable modems should be transmitting long packets as often as possible.

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G10 CMTS Installation and Operation132

10. Press the SWEEP key, select SWP TIME MAN (Sweep Time Manual), and set the sweep time to a value in the range of 80–100 µs.

11. Press the SGL SWP key (Single Sweep) repeatedly until the spectrum analyzer display is similar to the display in Figure 34 on page 132. The first three graticule columns represent the upstream burst transmission of a single cable modem, including the preamble.

12. Press the MKR (Marker) key and adjust the marker to a position on the signal that represents the median power level of the signal. In Figure 34, the marker is approximately positioned at a median level of 0.65 dBmV. Ensure that this power level is equal to the expected receive power level of the CMTS plus any attenuation between the CMTS and the point of measurement. The upstream channel power level can be viewed by issuing the show running-config CLI command:

G10$root# show running-config interface cable <slot/if>

continued...cable upstream 0 port 0cable upstream 0 power-level 0cable upstream 0 range-backoff 1 5

continued...

This command displays the current configuration. Look for the channel upstream <channel> power-level <power-level> output to determine the power level specified for the upstream channel.

Figure 34: Single Upstream Burst

Figure 35 on page 133 represents the spectrum analyzer display of multiple upstream bursts. This display was produced by following the previous procedure with the following modifications: the reference level in step 7 was set to 10 dBmV, and the sweep time in step 10 was set to 20 msec.

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Figure 35: Multiple Upstream Bursts

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Troubleshooting 135

Chapter 6Troubleshooting

This chapter identifies common issues associated with the operation and configuration of the G10 CMTS, the HFC plant, and CM provisioning. Recommendations for troubleshooting and resolving these issues using the flap-list and debug features of the G10 CMTS are also provided. For purposes of discussion, HFC plant refers to all cabling and equipment on the RF side of the network, other than the CMTS, regardless of its physical location.

Features for Troubleshooting

The G10 CMTS provides powerful features that aid you with troubleshooting CMTS, CM, and HFC plant related issues, including the flap-list, the local event log, debug commands, and various CLI commands that display relevant statistics.

Flap-List

To assist with diagnosing issues that can affect CM ranging, registration, operation, or data throughput, the G10 CMTS maintains a database of CMs along with various modem statistics for each CM. When a CM exhibits behavior that matches pre-defined criteria—referred to as a flap—an entry is added to a table called a flap-list. Each flap-list entry contains the MAC address of the CM, along with additional modem statistics that can assist in determining why the CM flapped. Flaps can be logged into the local event log, and can generate traps and syslog messages.

The flap criteria are defined globally for all cable interfaces by setting various parameters (thresholds) within the cable modem flap-list command. If a parameter is not explicitly set, a flap is defined by its default value. The global flap thresholds can be overridden on an upstream channel basis by the cable upstream modem flap-list command.

After an entry is added to the flap-list for a CM, any subsequent flap for that CM, whether defined explicitly or by default, updates that flap-list entry with new statistics (including a flap count). Examples of flaps include excessive initial ranging, missed station maintenance opportunities, large upstream power adjustments, and a signal-to-noise ratio (SNR) dropping below a threshold.

We recommend that you review the G10 CMTS release notes for details regarding the latest features, changes, and known and resolved issues. This might assist you with troubleshooting some of the issues you encounter with the operation of your system.

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G10 CMTS Installation and Operation136

A flap-list can be displayed by issuing the show cable flap-list and show cable modem flap commands. The display is sorted by the specified parameter (see Table 34 for a list of sort parameters).

Table 34: Flap-list Sort Parameter

The following example displays the flap-list sorted by the total number of flaps (under the column labeled Total).

Parameter Description

by-total-flaps Sorts the flap-list in descending order of the Total column.

by-time Sorts the flap-list from most recent (top) to least recent (bottom) i.n the LTime column.

by-snr-flaps Sorts the flap-list in descending order of the SNR column.

by-cer-flaps Sorts the flap-list in descending order of the CER column.

by-mer-flaps Sorts the flap-list in descending order of the MER column.

by-im-flaps Sorts the flap-list in descending order of the IM column.

by-sm-flaps Sorts the flap-list in descending order of the SM column.

by-power-adjust Sorts the flap-list in descending order of the PAdj column.

by-frequency-adjust Sorts the flap-list in descending order of the FAdj column.

by-interface If the slot and if parameters are not specified, the flap-list is sorted in ascending order of slot, interface, and port in the CableIF column. See slot and if to see their effect on the sorting.

slot If specified, only the flap-list entries associated with CMs on the DOCSIS Module slot are displayed.

Slot (1–4 or 10–13)

if If specified, only the flap-list entries associated with CMs on the slot and if are displayed.

Interface (0–3)

by-upstream If the slot and channel parameters are not specified, the flap-list is sorted in ascending order of slot, channel, and port in the CableIF column. See slot and channel to see their effect on the sorting.

channel If specified, only the flap-list entries associated with CMs on the slot and channel are displayed.

The upstream channel (0–7 or 0–15, depending on the G10 CMTS DOCSIS Module model)

by-mac If specified, only the flap-list entries associated with the CM that has a MAC address of mac-address are displayed.

mac-address MAC address of CM specified as xxxx.xxxx.xxxx in hexadecimal.

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Troubleshooting 137

GX$root# show cable flap-list by-total-flaps

Display the entire flap-list sorted by the total number of flaps (under the column labeled Total).

MacAddr CableIF IM SM PAdj FAdj SNR MER CER

LTime LEvnt Total FAdjAmnt SNRavg MERavg CERavg

0002.0001.2C28 C02/0 U00/0 0 0 72 0 0 0 0

May 06 15:18:21 PADJ FLAP 72 0 34 27 0

0000.CA25.1C4A C02/0 U00/0 0 0 59 0 0 0 0

May 06 15:10:42 PADJ FLAP 59 0 34 28 0

0020.40A7.278C C02/0 U00/0 45 0 3 0 0 1 0

May 06 15:23:12 IM FLAP 49 0 34 12 72

00E0.6F03.1061 C02/0 U00/0 0 0 48 0 0 0 0

May 06 15:21:40 PADJ FLAP 48 0 34 27 0

0010.951A.0424 C02/0 U00/0 0 0 0 6 0 0 0

May 07 14:14:54 FADJ FLAP 6 104 28 24 0

0010.9517.91B2 C02/0 U00/0 0 0 0 4 0 0 0

May 07 14:15:49 FADJ FLAP 4 -107 28 24 0

0010.951A.044F C02/0 U00/0 0 0 0 3 0 0 0

May 07 14:16:19 FADJ FLAP 3 106 29 25 0

Total checked entries 7

Table 35 explains each statistic provided in the flap-list. All thresholds cited in Table 35 are parameters within the cable modem flap-list and cable upstream modem flap-list CLI commands. Table 36 on page 139 explains the flap-list thresholds that can be set within the cable modem flap-list and cable upstream modem flap-list commands. See the G-series CMTS CLI and SNMP Reference for details regarding all commands related to the flap-list.

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Table 35: Flap-list Statistics

Statistic Description

MacAddr The MAC address of the CM that flapped.

CableIF The slot/interface and upstream channel/port on which the flapping CM resides, in the form: Cslot/interface Uchannel/port

IM This counter is incremented when the time between two successive initial maintenance attempts (ranging) by the CM is below the threshold im-retry-interval.

SM This counter is incremented when the number of consecutively missed station maintenance opportunities (ranging) by the CM is above the threshold sm-miss-threshold, and the CMTS subsequently receives a successful ranging request from the CM (this latter condition is required to discern whether the CM is missing station maintenance opportunities or is off-line).

PAdj This counter is incremented when the power adjustment sent to the CM during station maintenance is above the threshold power-adjust-threshold.

FAdj This counter is incremented when the absolute value of the accumulated sum of all the relative frequency offset corrections sent to a CM, following initial ranging or the latest frequency adjustment flap, is greater than or equal to the threshold frequency-adjust-threshold.

SNR This counter is incremented when the measured Signal-to-Noise Ratio (SNR) of the CM drops below threshold snr-threshold.

MER This counter is incremented when the measured Modulation Error Rate (MER) of the CM drops below threshold mer-threshold.

CER This counter is incremented when the measured Codeword Error Rate (CER) of the CM rises above cer-threshold.

LTime The timestamp that indicates when the CM flapped.

LEvnt A description of the type of flap that occurred.

Total This counter represents the total number of flaps that have occurred for the CM.

FAdjAmnt The accumulated sum of all the relative frequency offset corrections sent to a CM that triggered the flap.

SNRavg The average SNR for the CM.

MERavg The average MER for the CM.

CERavg The average CER for the CM.

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Troubleshooting 139

Table 36: Flap-list Thresholds

Threshold Description

snr-threshold A flap occurs when the measured SNR of a CM using QPSK or 16QAM modulation drops below this threshold (specified in dB). The valid range is 1–100, and the default is 18 and 24 for QPSK and 16QAM, respectively. The thresholds for QPSK and 16QAM can be changed by using the snr-qpsk-threshold and snr-16qam-threshold parameters, respectively.

snr-qpsk-threshold A flap occurs when the measured SNR of a CM using QPSK modulation drops below this threshold (specified in dB). The valid range is 1–100 and the default is 18.

snr-16qam-threshold A flap occurs when the measured SNR of a CM using 16QAM modulation drops below this threshold (specified in dB). The valid range is 1–100 and the default is 24.

mer-threshold A flap occurs when the measured modulation error rate (MER) of a CM drops below this threshold (specified in dB). The valid range is 1–100 and the default is 18.

cer-threshold A flap occurs when the measured codeword error rate (CER) of a CM rises above this threshold (specified in units of 10-6). The CER is the ratio of the number of codewords received with errors, before error correction is attempted, and the total number of codewords received (with and without errors). The valid range is 1–1000000 and the default is 1 (1 x 10-6).

power-adjust-threshold A flap occurs when the power adjustment sent to the CM during station maintenance is above this threshold (specified in dB). The valid range is 1–100 and the default is 3.

frequency-adjust-threshold A flap occurs when the absolute value of the accumulated sum of all the relative frequency offset corrections sent to a CM, following initial ranging, is greater than or equal to this threshold (specified in Hz). The valid range is 0–10000000 and the default is 0 (disabled).

im-retry-interval A flap occurs when the time between two successive initial maintenance attempts by a particular CM is below this threshold (specified in seconds). The valid range is 60–86400 and the default is 180.

sm-miss-threshold A flap occurs when the number of consecutively missed station maintenance opportunities by a particular CM is above this threshold, and the CMTS subsequently receives a successful ranging request from the CM (this latter condition is required to discern whether the CM is missing station maintenance opportunities or is off-line). The valid range is 1–100 and the default is 2.

size The maximum number of CMs that can be displayed in the flap-list. The valid range is 1–8192 and the default is 8192.

days The duration, in days, to maintain an entry in the flap-list, counted from its last flap. The valid range is 0–60 and the default is 1. If specifying a value less than one day, enter 0 for days and use the optional parameters hours and/or minutes. The maximum age-time of a flap is 60 days and the minimum is 60 minutes.

hours The duration, in hours, to maintain an entry in the flap-list, counted from its last flap. The valid range is 0–23 and the default is 0. If specifying a value less than one hour, enter 0 for hours and use the optional parameter minutes. The maximum age-time of a flap is 60 days and the minimum is 60 minutes.

minutes The duration, in minutes, to maintain an entry in the flap-list, counted from its last flap. The valid range is 0–59 and the default is 0. The maximum age-time of a flap is 60 days and the minimum is 60 minutes.

show Displays the current value of each flap-list parameter.

event-enable By default, only when a CM is first added to the flap-list is a vendor-specific event generated (subsequent flaps for that CM do not generate events). If the event-enable parameter is specified, all flaps generate vendor-specific events, even for a CM that already exists in the flap-list.

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G10 CMTS Installation and Operation140

Use the Flap-List for Troubleshooting

Table 37 summarizes the flap-list statistics and the potential HFC plant issues associated with these statistics. Note that the quantification of the statistics is plant dependent, so general qualifications, such as High and Low, are provided.

Table 37: Flap-list Association to Potential Issues

Statistic Value Potential Issues

IM High ! DHCP server issues

! TFTP server issues

! Configuration file issues

SM High ! Noise

! Ingress

! Impairments such as common path distortion

! Laser clipping distortion

! Attenuation (too large or too small)

CER High (with Low CERavg) ! Impulse noise

CERavg High ! Ingress

! Impulse noise

! Impairments such as common path distortion

! Laser clipping distortion

PAdj High ! High attenuation in the return path

! Changing environmental conditions that affect the return path, such as temperature

! Improper amplification

! Poor amplifier performance

FAdj High ! Significant frequency error introduced by frequency stacking multiplexer (sometimes called block upconversion) in the return path

! Degraded frequency stability in CM

SNRavg Low ! Increase in return path noise due to:

! Amplifier thermal noise

! Fiberoptic link noise

! Ingress

! High attenuation in the return path

MERavg Low Any issues that affect the phase and amplitude of the signal in the return path:

! Noise

! Impairments

! Non-linear distortions (in lasers and amplifiers, for example)

! Linear distortions such as group delay variance

! Quality of CM transmitter

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Troubleshooting 141

The following general guidelines should be considered when interpreting the flap-list statistics:

! If the flap-list statistics are the opposite of the values presented in Table 37, the provisioning and the HFC plant conditions are considered satisfactory. Use these values to establish an operational baseline.

! Sorting the flap-list by the total number of flaps, or by a specific flap, can assist with locating problematic nodes in the HFC plant. For example, if the flap-list is sorted by MERavg, and the flap entries with the lowest MERavg values are all within the same CableIF, your diagnostic procedures can focus on a particular area of the return path.

! Sorting the flap-list by MAC address (by-mac) can reveal issues associated with CMs manufactured by the same vendor. This can be determined by inspecting the unique vendor identifier contained in the first 24 bits of the MAC address.

! MERavg provides a good metric for the overall quality of the return path because it is affected by virtually every possible source of QPSK/QAM signal amplitude and phase distortion (as opposed to other metrics that are affected mostly by noise). As such, MERavg can be used to gauge the margin of failure available within a particular upstream channel.

! If the IM value is high and the SM value is low, the CM might be having problems with:

! Initial ranging due to CMTS configuration issues.

! Initial ranging due to HFC plant issues in the forward path or the return path.

! Registration due to provisioning issues.

! Stability issues.

! If the IM value is low and the SM value is high, the CM is able to successfully register, but there might be intermittent HFC plant issues in the forward path or the return path that cause the CM to unsuccessfully use periodic maintenance opportunities.

! A high PAdj value indicates that a CM’s power adjustment is changing by a significant amount which suggests problems in the return path (see Table 37 on page 140). Comparing PAdj for CMs that reside before and after an amplifier in the return path can provide an indication of amplifier issues. Increasing the power level of an RF signal can lead to laser clipping which results in corrupted codewords as seen by the CMTS. Therefore, a high PAdj value in conjunction with a high CERavg value might provide an indication of laser clipping.

! A high FAdj value can occur when the MSO uses a frequency stacking multiplexer (sometimes called block upconversion) in which multiple upstream spectrums are stacked in frequency at the fiber node in the upstream, and there is significant frequency error introduced in the upconversion and downconversion process. Also, CMs that have degraded frequency stability will also cause frequency adjust flaps to occur.

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G10 CMTS Installation and Operation142

Local Event Log

The local event log of the CMTS corresponds to the docsDevEventTable within the DOCS-CABLE-DEVICE-MIB (RFC2669). This log can assist with troubleshooting various issues. The OSSI specification defines required events that a CMTS must support. In addition, the G10 CMTS supports Juniper Networks-specific events (see Appendix C). By default, Juniper Networks-specific event generation is enabled (controlled by the pbcCmtsEventsEnable object in the PBC-CMTS-MIB enterprise MIB). Juniper Networks-specific events are categorized into event classes—ENVMON, CHASSIS, SOFTWARE, ACCESS, CONFIG, DATAPATH, RFINTERFACE, FLAPLIST, DEBUG, and CMSTATECHANGE. Trap generation for Juniper Networks-specific events is controlled by the pbcCmtsNotificationsControl object in the PBC-CMTS-MIB enterprise MIB. See the G-series CMTS CLI and SNMP Reference for more details regarding the enterprise MIBs.

To view the log, issue the show local-log command. Table 38 on page 142 provides the correspondence between the log display headings and the DOCS-CABLE-DEVICE-MIB objects.

GX$root> show local-log

Time shown as : YYYY:MM:DD:HH:MM:SS:DS

Index Date/Time Level Id Description

----- ---------------------- ----------- ---------- ----------------------

7180 2002:08:05:08:13:02:05 information 2539850601 DATAPATH Unverifiable IP add

ress 20.5.1.2 received from CPE MAC 0-1-2-E4-2A-C7. CM MAC 0-90-83-39-BA-CE

7181 2002:08:05:08:13:41:07 information 2539850603 DATAPATH Invalid CPE IP (192

.168.27.96), MAC 0-20-40-7F-4F-CA from CM 0-20-40-7F-4F-CA; address not allocate

d

7182 2002:08:05:08:13:42:04 information 2539850603 DATAPATH Invalid CPE IP (192

.168.27.96), MAC 0-20-40-7F-4F-CA from CM 0-20-40-7F-4F-CA; address not allocate

d

Table 38: Local Event Log Headings Displayed

See the DOCSIS OSSI specification and the DOCS-CABLE-DEVICE-MIB for more details regarding the docsDevEventTable.

Display HeadingsDOCS-CABLE-DEVICE-MIB Object Meaning

Index docsDevEvIndex Relative ordering in the event log.

Date/Time docsDevEvFirstTime The time the entry was created.

Level docsDevEvLevel The priority level of the event.

Id docsDevEvId Unique identifier used by the G10 CMTS for the event type.

Description docsDevEvText A text description of the Id.

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Troubleshooting 143

Debug Commands

The debug feature sends informational messages to a Telnet, secure shell (SSH), or console session whenever a debug event occurs. Debug event types are defined by CLI debug commands for events such as ranging, registration, and the transmission of certain MAC messages (such as MAP and UCC messages).

Debug messages are enabled by performing the following tasks:

1. Define a list of MAC addresses, service IDs (SIDs), or slot/interfaces (MAC domains) to monitor by using the debug cable interface cable command or the debug cable mac-address command. These are known as debug filters.

2. Define the debug event types to be monitored by issuing the appropriate debug commands (such as debug cable range and debug cable registration).

3. Enable debug message output for the current Telnet, secure shell (SSH), or console session by issuing the terminal monitor command.

Table 39 on page 144 provides a list of the debug cable command parameters that define the event types to be debugged. For example, the command debug cable range enables the display of debug events associated with initial and station maintenance ranging.

If no debug filters are defined, all enabled debug event types are monitored, regardless of their associated MAC addresses, SIDs, and slot/interfaces. This can result in a continuous display of debug messages in which case you can enter no terminal monitor (blindly) to stop the display.

Care should be taken when using the debug feature to ensure that the performance of the CMTS is not severely impacted. Restricting the number of CMs and debug events minimizes the resources required to utilize this feature.

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G10 CMTS Installation and Operation144

Table 39: Event-defining Debug Command Parameters

The following example illustrates how to enable debugging for DHCP-related activity associated with CMs that reside within the MAC address range of 1234.5678.0000 through 1234.5678.FFFF:

GX$root# debug cable mac-address 1234.5678.ABCD FFFF.FFFF.0000

GX$root# debug cable dhcp

GX$root# terminal monitor

See the G-series CMTS CLI and SNMP Reference for details regarding the debug commands.

Parameter Debug Message Displayed in Association With:

arp Address Resolution Protocol (ARP)

bpkm Baseline Privacy Key Management

bwr Bandwidth Request Frames (REQ)

dcc Dynamic Channel Change

dci Device Class Identification (DCI)

dhcp Dynamic Host Configuration Protocol (DHCP)

dynsrv Dynamic Service Add, Dynamic Service Change, and Dynamic Service Delete messages

icmp Internet Control Message Protocol (ICMP)

mac-protocol MAC layer (bpkm, dcc, dci, dynsrv, range, registration, ucc, updis)

map Upstream Bandwidth Allocation MAP (MAP) messages

range Initial and station maintenance ranging

registration CM registration

ucc Upstream Channel Change (UCC) messages

ucd Upstream Channel Descriptor (UCD) messages

updis Upstream Transmitter Disable (UP-DIS) messages

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Troubleshooting 145

Various CLI Commands

The following CLI commands can assist with troubleshooting issues by displaying various types of information, including CM operational states, chassis hardware status, error logs, physical layer statistics, and configuration data:

! show cable modem—Displays the number of CMs that exist in various operational states, or displays individual modem information.

! show cable modem connectivity—Displays CM connectivity information.

! show cable modem counters—Displays byte and packet counters for all active service flows for the specified CMs.

! show cable modem errors—Displays CM error statistics, such as bit error rate (BER), codeword error rate (CER), and modulation error rate (MER).

! show cable modem flap—Displays flap data for CMs.

! show cable modem offline—Displays a list of offline CMs, along with various operational parameters.

! show cable modem phy—Displays CM physical layer parameters.

! show cable modem qos-profile—Displays all CMs associated with the specified QoS profile ID.

! show cable modem ranging-statistics—Displays CM ranging statistics, such as the number of initial maintenance requests seen, and the number of station maintenance opportunities scheduled.

! show cable modem registered—Displays a list of registered CMs, along with various operational parameters.

! show cable modem remote-query—Displays various CM statistics and state information using the SNMP protocol for CMs that are in the IP-complete or registration-complete states.

! show cable modem rogue—Displays a list of CMs that have been declared as rogue.

! show cable modem unregistered—Displays a list of unregistered CMs, along with various operational parameters.

! show cable modem verbose—Displays various CM parameters, statistics, and state information pertaining to an individual CM specified by its IP or MAC address.

! show tech-support—Displays information to assist technical support with troubleshooting.

See the G-series CMTS CLI and SNMP Reference for more details regarding these commands.

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G10 CMTS Installation and Operation146

ServiceGuard Management System

Spectrum monitoring of the HFC return path can be accomplished by using the ServiceGuard Management System. The ServiceGuard Management System provides the headend technician with an integrated tool to monitor and analyze the return path network performance at the G10 CMTS by collecting measurements gathered by the Broadband Cable Processor ASIC, processing them into useful statistical information, and presenting them graphically. Statistics that can be measured and plotted within the ServiceGuard Management System include noise power and noise power density, signal-to-noise ratio (SNR), modulation error ratio (MER), and codeword error ratio (CER).

The ServiceGuard Management System incorporates an integrated Impairment Identification tool that allows for unattended monitoring of statistics to characterize compromised performance to a potential cause (such as impulse or burst noise, narrowband ingress, or microreflections).

This application allows a technician to recognize, identify, and troubleshoot issues with the return path. In addition, the technician can use these features to map and allocate spectrum for upstream channels.

The ServiceGuard Management System is an optional tool that is not part of the standard G10 CMTS shipment. A ServiceGuard Management System application must be purchased to take advantage of this powerful diagnostic aid.

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Troubleshooting

CMTS Power and Bootup Issues

147

CMTS Power and Bootup Issues

This section lists various issues, along with procedures to resolve them, associated with powering up and booting the CMTS.

CMTS Is Not Powering Up

If it appears that power is not being applied to the CMTS—because you do not hear or see any fans rotating, or do not see any LEDs illuminated—this might be attributed to one or more of the following reasons:

! The power cords are not securely connected to the power transition modules and to their respective power sources.

! The power switches and the power sources are not turned on.

! Note the status of the power supply LEDs. If the Power LED is not green, or if the Fault LED is illuminated, take the appropriate actions as described in Table 17 on page 78.

! There are not enough power supplies installed in the chassis to support your configuration. See Table 15 on page 51 for the G10 CMTS power supply requirements.

CMTS Does Not Successfully Boot Up

If you do not get to the login and password prompts, followed by the CLI prompt, the CMTS did not successfully boot up. This might be attributed to one or more of the following reasons:

! Any new modules added to the system are not properly installed and mated to the midplane of the chassis as described in “Installation” on page 39.

! The CMTS does not have at least one DOCSIS Module installed.

! A module is not operational. After checking that all modules are properly installed in the chassis, check their status LEDs to ensure they have powered up successfully. If the status LEDs behave as follows, contact Juniper Networks customer support:

! The Power LED of a Chassis Control Module remains red indefinitely.

! The Test LED of any DOCSIS Module remains red indefinitely.

! Any of the 1 through 6 LEDs of any DOCSIS Module is not green.

! The OK LED of a NIC Module does not illuminate.

! The OPERATIONAL LED of a NIC Access Module does not illuminate.

A faulty Chassis Control Module will prevent the CMTS from successfully booting up, and might give the false appearance that the DOCSIS Modules and the NIC Modules are also faulty based on their LED status. Determine the operational status of the Chassis Control Module before declaring any DOCSIS Modules or NIC Modules as faulty.

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CMTS Does Not Boot Up With the Upgraded Software Release

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G10 CMTS Installation and Operation148

CMTS Does Not Boot Up With the Upgraded Software Release

The system apply upgrade command is used to upgrade the software to a new release following the next reboot. If the system is not using the new release following a reboot (which can be determined by the show version command), it might be because the upgraded software release is not compatible with the existing hardware. In this case, the software running on the CMTS following the reboot is the same release that was running on the CMTS prior to the attempted upgrade.

If this issue occurs, consult with Juniper Networks customer support to determine how to resolve the incompatibility. Viewing the local event log might also provide additional information.

CMTS Powers Down

If the CMTS powers down, this might be attributed to one or more of the following reasons:

! Power has been disrupted to the system. See “CMTS Is Not Powering Up” on page 147.

! The power supplies in the CMTS have reached their over-temperature shutdown limit.

1. Check the ambient temperature in the headend or hub in which the CMTS resides. The air cooling system might not be fully operative in which case the ambient operating temperature might have exceeded the maximum specification for the G10 CMTS of 40°C. See if an SNMP message was sent to the NMS or an entry was added to the event log indicating the temperature of the CMTS exceeded the high threshold as set by the chassis environment ambient-temperature command.

2. Check that all empty module slots and power supply bays are populated with air management modules, panels, and filler panels. In addition, the power supply faceplate must always be installed while operating the CMTS. These requirements ensure that proper air ventilation occurs throughout the chassis as designed.

3. Ensure that proper clearance is maintained between the G10 CMTS chassis and its surroundings to allow adequate air ventilation to flow into the air intakes and out of the air exhaust. See “Rack Mounting” on page 40 for clearance details.

4. One or more of the fans within a fan tray might have stopped rotating while the CMTS was operating. If an SNMP message was sent to the NMS, or an entry was added to the event log indicating a fan failure, or if a fan tray LED was illuminated red prior to the shutdown, the entire tray containing the faulty fan must be replaced.

DOCSIS Module Not Operating After Hot Insertion

If a DOCSIS Module does not operate after it is plugged into the CMTS chassis while the CMTS is powered on and operating (hot insertion), the CMTS software release and the BIOS software on the Chassis Control Module might not support the hot swap feature of the G10 CMTS. See the software release notes shipped with the G10 CMTS for possible information related to this issue.

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Troubleshooting

Configuration Issues—Ideal HFC Plant

149

Configuration Issues—Ideal HFC Plant

This section assumes that the HFC plant is ideal and not contributing to issues associated with the CMs. Following is a list of potential issues and the procedures to resolve them.

“HFC Plant-Related Issues” on page 155 addresses issues associated with problems in the HFC plant.

CM Cannot Successfully Range

If a CM cannot successfully range, this might be attributed to one or more of the following reasons:

! The downstream and upstream channel and port mapping are not properly aligned with the forward and return path topology of the HFC plant. For example, suppose the intent is for a CM to reside in MAC domain 0 (cable interface 0), which contains downstream channel 0 and upstream channels 0 and 1. Its forward and return paths are connected to downstream port 0 and upstream port 0, respectively, of an HFC Connector Module. This channel and port assignment is the G10 CMTS default configuration for an 8-upstream channel DOCSIS Module. If the CMTS is manually reconfigured so that upstream channel 0 is moved to port 1 (but still in MAC domain 0), when upstream channel 0 is enabled, the CMTS will be expecting the CM to transmit on port 1, but the CM will be transmitting its ranging requests on port 0.

! The upstream channel on which the CM resides is not enabled. Issue the no cable upstream shutdown command to enable an upstream channel.

A high IM counter value in the flap-list can be an indication of ranging issues.

The local event log might contain events that explain why a CM has been de-ranged (see the cable modem event-enable command in the G-series CMTS CLI and SNMP Reference).

CM Cannot Establish IP Connectivity

If a CM cannot establish IP connectivity, this might be attributed to one or more of the following reasons:

! The DHCP server could not be accessed because the network is down.

! The DHCP server is down. Ping the DHCP server IP address using the ping command to see if the server is responding.

! The DHCP server parameters are not properly configured within the CMTS. See “DHCP Server Parameters” on page 114 for more information.

A high IM counter value in the flap-list can be an indication of DHCP setup issues.

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Configuration Issues—Ideal HFC Plant

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G10 CMTS Installation and Operation150

CM Cannot Successfully Register

If a CM cannot successfully register, this might be attributed to one or more of the following reasons:

! The CM did not receive a configuration file because:

! The TFTP server could not be accessed because the network is down.

! The TFTP server is down.

! The name of the configuration file provided in the DHCP response was incorrect.

! The TFTP server IP address provided in the siaddr field of the DHCP response was incorrect.

! The TFTP server was hosting the maximum number of sessions when the CM requested the configuration file.

! The CMTS indicated an authentication failure in its REG-RSP message because:

! The TFTP Server Timestamp field in the CM’s REG-REQ message differs from the local time maintained by the CMTS by more than the CM Configuration Processing Time (the maximum time for a CM to send a REG-REQ message following the receipt of the configuration file, which must be a minimum of 30 seconds).

! The TFTP Server Provisioned Modem Address field in the CM’s REG-REQ message does not match the requesting CM’s actual address.

! The message integrity check (MIC) was not valid because the shared secret between the CMTS and the provisioning server did not match which results in an authentication failure. See “Shared Secret” on page 119 for more information.

! The message integrity check (MIC) was not valid because the configuration file was The CMTS might have made an entry for an authentication failure in the local event log. Issue the show local-log command to display the log.

! The CM received a configuration file, but the contents of the file are not valid. Ensure the configuration settings are valid, and are consistent with the DOCSIS specifications.

! The CM timed out waiting for the time of day (TOD) server to respond. Newer CMs continue the registration process while continuing to retry the TOD request. However, some older CMs do not attempt to register if they timeout while waiting for a TOD response. The TOD timeout might occur if the TOD server IP address provided in the DHCP response was incorrect.

A high IM counter value in the flap-list can be an indication of TFTP, configuration file, or registration issues.

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Troubleshooting

Configuration Issues—Ideal HFC Plant

151

CM Throughput is Slow

If the throughput of a CM seems slow, this might be attributed to one or more of the following reasons:

! The DOCSIS 1.0 Class of Service Configuration Setting (for DOCSIS 1.0) or the Upstream Service Flow Configuration Setting and the Downstream Service Flow Configuration Setting fields (DOCSIS 1.1) of the configuration file are limiting the maximum upstream and downstream bandwidth of the CM. If necessary, increase the parameters within these fields in the configuration file to increase the CM’s throughput.

To determine the maximum bandwidth settings for a CM, issue the show cable modem command to acquire the CoS/QoS profile for a CM (CoS for DOCSIS 1.0, QoS for DOCSIS 1.1):

GX$root# show cable modem 0090.833d.5469

Intrfc Prim Online Timing Rec QoS IP-Address MAC-Address Ver Vpn

Sid State Offset Power Id

C2/0/U0 7593 online 1989 0.4 1 192.168.27.131 0090.833D.5469 1.1

In this example, the CM uses QoS profile 1. Then issue the show cable qos profile command to display the characteristics of QoS profile 1:

GX$root# show cable qos profile 1

Service Prio Max Guarantee Max Max tx Create Baseline

class upstream upstream downstream burst by privacy

bandwidth bandwidth bandwidth enable

1 0 1000000 0 10000000 0 cmts no

The CM’s maximum upstream bandwidth is 1 Mb/s, and its maximum downstream bandwidth is 10 Mb/s.

! The CM is subjected to upstream policing because the maximum sustained traffic rate (MSTR) provisioned for the CM has been exceeded. To determine if an upstream policing algorithm has been enabled by the maximum-rate-enforcement command, issue the show running-config command, specifying the cable interface in which the CM of interest resides, to determine if a traffic scheduling policy is assigned to the CM’s channel:

GX$root# show running-config interface cable <slot/if>

! The CM is subjected to downstream policing because the maximum sustained traffic rate (MSTR) provisioned for the CM has been exceeded. In this case, the downstream packets are dropped.

! The downstream or upstream channel in which the CM resides is subjected to a congestion control policy, such as random early detection (RED), and this policy is leading to dropped packets (see the cable policy congestion-control command). Issue the show running-config command, specifying the cable interface in which the CM of interest resides, to determine if a congestion control policy is assigned to the CM’s channel:

GX$root# show running-config interface cable <slot/if>

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Configuration Issues—Ideal HFC Plant

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! Congestion exists in the upstream.

The approximate upstream channel utilization can be computed by monitoring the ifInOctets object in the DOCS-IF-MIB (RFC2670). The ifInOctets object contains the total number of octets received on an interface, including data packets as well as MAC layer packets, and includes the length of the MAC header. However, this object does not account for the PHY layer overhead—preamble, FEC, and guard time—which consumes a certain percent of the available raw channel bandwidth. The following procedure explains how to compute the approximate upstream channel utilization using an SNMP MIB browser:

1. Set the SNMP polling time to a value large enough to capture a statistically significant amount of upstream traffic. In this example, assume the polling time is 60 seconds.

2. Browse the ifInOctets object for the interface that corresponds to the upstream channel you are measuring. Wait for the value of the object to change and record this value. Assume the value is 33,019,041 octets.

3. Wait 60 seconds for the value of the object to change and record this value. Assume the value is 65,903,162 octets.

4. Subtract the value of the object measured in step 2 from the value measured in step 3 to obtain the number of octets received by the CMTS on this upstream channel over the polling time: (65,903,162–33,019,041=32,884,121 octets).

5. Multiply the value computed in step 4 by 8 (to convert to bits), then divide by the polling time to compute the upstream channel bandwidth (without the PHY overhead): [(32,884,121 octets * 8) / 60 sec]=4,384,549 bps.

6. Compute the maximum available raw bandwidth by multiplying the symbol rate of the channel by the number of bits/symbol. Assume the symbol rate is 2560 Ksym/sec, and the modulation is QPSK (2 bits/symbol), which yields a bandwidth of 5,120,000 bps.

7. Computing the PHY overhead, and hence the channel efficiency, is a non-trivial exercise because it is dependent on the mix of transmissions that use a particular interval usage code, packet sizes, and the modulation profile and mini-slot size of the channel. Using practical values for these variables, assume a channel efficiency of 92% (be aware that the channel efficiency can be lower depending on the assumptions made). Derating the maximum available raw bandwidth of the channel by 92% yields 4,710,400 bps (5,120,000 bps*0.92).

8. The approximate upstream channel utilization can be computed by dividing the measured bandwidth calculated in step 5 by the derated maximum bandwidth calculated in step 7: (4,384,549 / 4,710,400)=93%. This represents a highly utilized channel.

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Troubleshooting

Configuration Issues—Ideal HFC Plant

153

Congestion might be attributed to one or more of the following reasons:

! An excessive number of CMs are attached to a DOCSIS Module in the return path of the HFC plant. Review your corporate guidelines to ensure you have not exceeded the maximum number of CMs per DOCSIS Module for the modulation profiles being used. If necessary, install additional DOCSIS Modules.

! An excessive number of CMs are assigned to the upstream channel in which the CM transmits. Issue the show cable modem command as follows to determine the number of CMs within an upstream channel:

GX$root# show cable modem <slot/if> upstream 0 summary

Cable Modem Operational States

Interface CM Dstry Dclr Rng Rng Rng IP Reg Access

Qty Abort Compl Compl Denied

C2/0/U0 7 0 0 0 0 0 0 7 0

An excessive number of CMs on an upstream channel can be addressed by:

! Enabling load balancing in the CMTS by issuing the cable upstream-load-balance command. This command enables automatic load balancing whereby the CMTS will attempt to assign a CM to an upstream channel based on channel width and utilization.

! Provisioning one or more additional upstream channels in the slot/interface (MAC domain) in which the CM resides (see the cable upstream add command). The logical allocation of up to 16 upstream channels to any of the four upstream ports on each DOCSIS Module allows channels to be provisioned within the G10 CMTS without the need for physical node recombining.

! Increasing the upstream channel width by using the cable modem upstream channel-width command.

! The CM is transmitting using QPSK modulation. The all-digital processing of the Broadband Cable Processor ASIC, along with its advanced noise cancellation and equalization algorithms, might allow the CMs on an upstream channel to operate at 16QAM. To change the modulation of an upstream channel, assign a new modulation profile to that channel. See “Configure an Upstream Modulation Profile” on page 101 for more information.

! Congestion exists in the downstream.

The approximate downstream channel utilization can be computed by monitoring the ifOutOctets object in the DOCS-IF-MIB (RFC2670). The ifOutOctets object contains the total number of octets transmitted on an interface, including data packets as well as MAC layer packets, and includes the length of the MAC header. However, this object does not account for overhead—such as FEC, MPEG, and DOCSIS MAC—which consumes a certain percent of the available raw channel bandwidth. The following procedure explains how to compute the approximate upstream channel utilization using an SNMP MIB browser:

1. Set the SNMP polling time to a value large enough to capture a statistically significant amount of upstream traffic. In this example, assume the polling time is 60 seconds.

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Configuration Issues—Ideal HFC Plant

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G10 CMTS Installation and Operation154

2. Browse the ifOutOctets object for the interface that corresponds to the downstream channel you are measuring. Wait for the value of the object to change and record this value. Assume the value is 383,456,157 octets.

3. Wait 60 seconds for the value of the object to change and record this value. Assume the value is 563,344,189 octets.

4. Subtract the value of the object measured in step 2 from the value measured in step 3 to obtain the number of octets transmitted by the CMTS on this downstream channel over the polling time: (563,344,189–383,456,157=179,888,032 octets).

5. Multiply the value computed in step 4 by 8 (to convert to bits), then divide by the polling time to compute the downstream channel bandwidth: [(179,888,032 octets * 8) / 60 sec]=23,985,071 bps.

6. Compute the maximum available raw bandwidth by multiplying the symbol rate of the channel by the number of bits/symbol. Assume the symbol rate is 5.056941 Msym/sec, and the modulation is 64QAM (6 bits/symbol), which yields a bandwidth of 30,341,646 bps.

7. Assuming a channel efficiency of 85% (due to overhead), derating the maximum available raw bandwidth of the channel yields 25,790,399 bps (30,341,646 bps*0.85).

8. The approximate downstream channel utilization can be computed by dividing the measured bandwidth calculated in step 5 by the derated maximum bandwidth calculated in step 7: (23,985,071 / 25,790,399)=93%. This represents a highly utilized channel.

Congestion in the downstream might be attributed to an excessive number of CMs attached to a DOCSIS Module in the forward path of the HFC plant. Review your corporate guidelines to ensure you have not exceeded the maximum number of CMs per DOCSIS Module. If necessary, install additional DOCSIS Modules.

! The CMTS is transmitting using 64QAM modulation. If the HFC plant can support reliable downstream transmissions using 256QAM modulation, change the modulation to 256QAM using the cable downstream modulation command.

! The performance on the network side interface (NSI) is slow. Find the NSI bottleneck and address the performance issue appropriately.

! If the cable modem is a CCCM (CPE controlled cable modem), the performance of the CPE is affecting the performance of the CM. The CPE performance can be affected by:

! A slow microprocessor.

! Not having enough RAM.

! Not having enough disk space.

! Running too many applications.

! Improper network configuration.

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Troubleshooting

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CM is Dropped

A CM might be dropped from the CMTS for the following reasons:

! The ratio of the aggregate minimum reserved traffic rate (MRTR) for all service flows on the CM’s channel to the channel bandwidth equals the maximum allowable ratio configured by the reservation minimum-rate-traffic command (applies to downstream and upstream). CMs are dropped by the CMTS to avoid exceeding this ratio. To view the current setting for this ratio, issue the show running-config command, specifying the cable interface in which the CM of interest resides, to determine if an admission control policy is assigned to the CM’s channel:

GX$root# show running-config interface cable <slot/if>

! The channel configuration has changed for a channel that was previously configured with QoS parameters for admitted service flows based on the original channel configuration. For example, assume the reservation minimum-rate-traffic command was issued to set the maximum allowable ratio of the aggregate MRTR for all admitted service flows to the channel bandwidth to 50%. If the original channel bandwidth was 10 Mb/s, but is reconfigured to 5 Mb/s, the aggregate MRTR above which CMs are dropped is reduced from 5 Mb/s (50% of 10 Mb/s) to 2.5 Mb/s (50% of 5 Mb/s).

HFC Plant-Related Issues

This section assumes that the HFC plant is potentially contributing to issues associated with the CMs. Following is a list of potential issues along with suggestions to resolve them.

CM Cannot Successfully Range

If a CM cannot successfully range, this might be attributed to one or more of the following reasons:

! There is too much attenuation in the return path. If the power level of the CM’s signal measured at the CMTS is not within the tolerable limits of the CMTS due to excessive attenuation, the CMTS will respond with an abort ranging status in the ranging response (RNG-RSP) message to the CM.

The cable upstream-min-power-level and cable upstream min-power-level commands allow you to configure the power level below the commanded power level at which a CM is considered successfully ranged. The default is –3 dB below the commanded power level. Consider issuing one of these commands to lower this threshold in case the CM can operate successfully at a lower power level.

! RF plant issues in the downstream prevent the CM from receiving unicast upstream bandwidth allocation MAP messages that define periodic ranging opportunities (station maintenance) for the CM. In this case, the CM will timeout and reinitialize its MAC, causing it to drop offline.

See the descriptions of the cable upstream-min-power-level and cable upstream min-power-level commands in the G-series CMTS CLI and SNMP Reference before issuing these commands. Their usage can lead to improper CMTS behavior.

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HFC Plant-Related Issues

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! RF plant issues in the return path prevent the CMTS from receiving ranging request (RNG-REQ) messages, in which case the CMTS will not provide ranging response (RNG-RSP) messages. In this case, the CM will timeout and reinitialize its MAC, causing it to drop off-line.

! Significant frequency error is being introduced by the frequency stacking multiplexer (sometimes called block upconversion) in the return path.

! Frequency stability within the CM is degraded.

High IM, SM, and FAdj counter values in the flap-list can be an indication of HFC plant issues that affect ranging (see Table 37 on page 140).

The local event log might contain events that explain why a CM has been de-ranged (see the cable modem event-enable command in the G-series CMTS CLI and SNMP Reference). Also, issuing the show cable modem ranging-statistics command can provide insight into ranging issues.

CM Throughput is Slow

If the throughput of a CM seems slow, this might be attributed to one or more of the following reasons:

! HFC plant issues, such as impulse noise or ingress, that corrupt upstream burst transmissions from the CM. A high CERavg value or a low MERavg value in the flap-list is indicative of this. Uncorrectable codewords cause packets to be dropped by the CMTS which reduces the CM throughput.

If the CER counter is high, but the CERavg is low, this suggests that burst noise is occurring, but its duration is too short to render a codeword uncorrectable. However, the source of the noise should be investigated as part of your preventive HFC plant maintenance routine.

! HFC plant issues, such as impulse noise, that corrupt downstream transmissions to the CM. Increasing the depth of the interleaver by using the cable downstream interleave-depth command can increase the amount of burst protection in the downstream. For example, the default interleaver depth using 64QAM modulation provides 5.9 µs of burst protection. This can be increased to 12, 24, 47, or 95 µs. Be aware that increasing the interleaver depth increases the latency of the transmission.

In general, a number of HFC-related issues can be responsible for the receipt of uncorrectable codewords at the CMTS. Table 37 on page 140 describes how to associate flap-list statistics to the presence of these issues.

Issuing one or more of the following commands can provide additional insight into HFC-related issues that affect CM performance:

! show cable modem errors

! show cable modem flap

! show cable modem phy

! show cable modem remote-query

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Maintenance and Upgrades 157

Chapter 7Maintenance and Upgrades

This chapter describes G10 CMTS maintenance and upgrade procedures that might need to be performed on an as-needed basis. The upgrade procedures for hardware components, such as power supplies and modules, consist of the removal and replacement of such components. This chapter only describes the former (removing hardware), while “Installation” on page 39 describes the latter (installing hardware).

Power Subsystem

The G10 CMTS can operate in a power redundant or non-redundant configuration. Power redundancy consists of redundant power supplies, power transitions modules, and power sources:

! Power supplies—The G10 CMTS can accommodate up to ten power supplies within domains A and B. Table 15 on page 51 provides the requirements for implementing N + 1 power supply redundancy.

! Power transition modules—All G10 CMTS systems are shipped with two power transition modules installed in each of the two domains to implement power transition module redundancy. This also facilitates power source redundancy.

! Power Sources—Each power transition module must be powered by sources on different circuits to implement power source redundancy.

When operating in a power-redundant configuration, a single power-related component can fault without affecting the operation of the CMTS. However, because the CMTS is no longer operating as a redundant system, we recommend that the faulted component be replaced as soon as possible. The replaced component can be hot-swapped without powering down the CMTS.

To determine if a power supply has faulted, check the status of the power supply LEDs. If the Power LED is not green, or if the Fault LED is illuminated, take the appropriate actions as described in Table 17 on page 78.

Before removing a power supply or any module from the G10 CMTS, attach one end of an ESD ground strap to your wrist and attach the other end to the ESD ground strap jack on the front of the chassis (see Figure 4 on page 9).

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If the CMTS is not operating in a power-redundant configuration, a fault with a single power-related component might cause the CMTS to shutdown.

In the case of AC power, the power is switched off by pressing the rocker switch on the AC power transition module to the OFF (O) position. In the case of DC power, the DC power transition module does not contain a power switch. We recommend that the DC power source be shutdown before removing the DC power cord from the DC power transition module terminal block. Once the power is switched off, the faulted component can safely be replaced.

See “Installation” on page 39 for power component installation instructions.

Remove Power Supplies

The power supplies in the G10 CMTS are designed to be hot-swappable, which means that the system can remain powered up while a power supply is being removed or installed.

The following procedure describes the steps required for removing a power supply:

1. The power supply faceplate must be removed by pulling the flanges on each side of the faceplate away from the chassis until the faceplate ball studs are removed from the power supply faceplate clips.

2. Loosen the upper and lower retainer screws of the power supply.

3. Press down on the ejector release while simultaneously pulling the ejector away from the power supply (see Figure 36 on page 159). The ejector should rest at approximately 45° from the faceplate. At this point, the power supply is physically and electrically removed from its connector on the midplane.

If a fault does occur within a non-redundant configuration, it is highly recommended that the power to the CMTS be switched off immediately for safety purposes.

Before removing a power supply, ensure that the remaining power supplies in the system can provide enough power to service the requirements of the modules installed in the system. See Table 15 on page 51 for system power supply requirements.

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Maintenance and Upgrades 159

Figure 36: Power Supply Removal

4. Slowly slide the power supply out of its bay until it is fully removed from the system.

5. If the power supply will not be replaced, a power supply filler panel must be installed to cover the empty power supply bay. Align the panel over the bay opening so that the two self-contained screws are on the left side of the panel when installed in the chassis (see Figure 4 on page 9). Apply 3 in-lb of torque to each of the two screws.

6. Repeat this process for all power supplies that must be removed.

7. Replace the power supply faceplate by aligning its four ball studs with the four power supply faceplate clips and pressing the faceplate towards the chassis until it snaps into place.

3

2

1

Power

Fault

The power supply faceplate and power supply filler panels must be installed prior to powering on the G10 CMTS to ensure that proper air ventilation occurs throughout the chassis, and to reduce EMI emissions.

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Fan Trays

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G10 CMTS Installation and Operation160

Fan Trays

In order to maintain an internal temperature below the maximum operating temperature of the G10 CMTS, all fan trays must be fully functional. If any of the fan trays fails, it must be replaced as soon as possible to ensure the system remains operational.

A fan tray failure can be detected in the following ways:

! A fan tray LED is illuminated red.

! If enabled, an entry was written the local event log.

! If enabled, an SNMP message was sent to the NMS indicating a fan failure.

! Issuing the show chassis environment command displays a fan speed of 0 RPM.

! If enabled, an SNMP message that was sent to the NMS indicating the temperature of the CMTS exceeded the high threshold as set by the chassis environment ambient-temperature command might provide an indication that a fan has failed.

Replace a Fan Tray

If a fan tray LED is illuminated red, one or more fans in that tray has failed and the entire fan tray must be replaced. The fan trays are hot swappable and can be removed and installed while the system is powered on.

If a fan tray fails to the point where inadequate air ventilation flows through the chassis, the Chassis Control Module might power down the system if the temperature within the chassis exceeds the threshold considered safe for system operation.

All fans within a fan tray contain top and bottom grills to provide protection during removal and installation. Nevertheless, care should be taken when inserting your hand anywhere in the vicinity of an operating fan.

Operating the G10 CMTS without fully-functional fan trays might cause irreparable damage or reduce the life of one or more modules in the system. After removing a fan tray, its replacement must be installed immediately.

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Front Fan Trays

This procedure describes how to replace a front fan tray (see Figure 37 on page 162).

1. The air intake faceplate must be removed by pulling the flanges on each side of the faceplate away from the chassis until the faceplate ball studs are removed from the air intake faceplate clips.

2. Each fan tray is held into place by a front fan tray retainer that resides on hinges. The retainer contains a spring-loaded plunger that mates with the chassis when the retainer is locked into position. To unlock the retainer, pull down on its plunger and swing it away from the chassis until it comes to rest.

3. Grab the fan tray directly underneath the flange that houses its LED and slowly pull the tray out of its bay until it is fully removed from the system. Figure 37 on page 162 shows a populated and an empty front fan tray bay in the chassis (the front fan tray retainer is not shown in the empty bay, and the air intake faceplate clips are not shown in either bay so that the referenced parts can be viewed).

4. Align the edges of the fan tray replacement within the chassis fan tray rails. Ensure that the fan tray edges are not seated above or below the rails, but are within the rails.

5. Slowly slide the fan tray completely into its bay until its power connector mates with its corresponding midplane power connector. You should be able to see and hear the fans operating within the tray.

6. The front fan tray retainer must be returned to its locked position by pulling down on its plunger, swinging the retainer toward the chassis, and releasing its plunger so that it mates with the chassis. If the plunger cannot mate with the chassis, the fan tray is not fully installed into its bay.

7. Replace the air intake faceplate by aligning its four ball studs with the four air intake faceplate clips and pressing the faceplate towards the chassis until it snaps into place.

Rear Fan Tray

This procedure describes how to replace a rear fan tray (see Figure 38 on page 163).

1. Loosen the eight self-contained screws that fasten the rear fan tray to the chassis.

2. Grasp the handles on each side of the fan tray and slowly pull the tray out of its bay until it is fully removed from the system.

3. Align the fan tray replacement within the chassis. The rear fan tray flanges in the chassis assure proper alignment within the bay.

4. Slowly slide the fan tray completely into its bay until its power connector mates with its corresponding midplane power connector. You should be able to see and hear the fans operating within the tray.

5. Manually fasten the eight self-contained screws of the rear fan tray to the chassis, then apply 4 in-lb of torque to each of the eight screws.

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Fan Trays

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G10 CMTS Installation and Operation162

Figure 37: Front Fan Tray Replacement

Fan TrayRail

MidplanePower

Connector

Fan TrayRail

Front FanTray Retainer

Front FanTray

RetainerPlunger

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Figure 38: Rear Fan Tray Replacement

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Fan TrayFlange

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MidplanePower

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Module Removal

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Module Removal

This section describes the removal procedures for DOCSIS Modules, HFC Connector Modules, Chassis Control Modules, CCM Access Modules, NIC Modules, and NIC Access Modules.

Remove a DOCSIS Module

This section describes the procedure for removing a DOCSIS Module. This module is hot-swappable which means that the system can remain powered up while it is being removed or installed.

1. Loosen the two retainer screws.

2. Press upward and downward on the ejector releases (action #1 in Figure 39 on page 165), but do not pull on the ejectors until the blue Hot Swap LED on the faceplate is illuminated (see Figure 30 on page 80).

3. After the Hot Swap LED is illuminated, simultaneously pull the ejectors away from the module faceplate. The ejectors should rest at approximately 45° from the faceplate. At this point, the DOCSIS Module is physically and electrically removed from its connectors on the midplane.

4. Slowly slide the module out of its slot until it is fully removed from the system.

5. Insert the module into an anti-static bag being careful to avoid directly touching any component on the module. Handling the module only by its card edges or ejectors is highly recommended.

6. If the module will not be replaced, an air management module that fills the module slot must be installed in its place (the procedure for installing this module is the same procedure as installing a DOCSIS Module; see “Install a DOCSIS Module” on page 51).

If a DOCSIS Module is being hot swapped, this procedure assumes that all services supported by that module have been moved to another DOCSIS Module.

One of the ejector releases on the DOCSIS Module activates a microswitch that signals the module to condition itself for hot swapping.

Air management modules and air management panels must always be installed in empty slots while operating the G10 CMTS to ensure that proper air ventilation occurs throughout the chassis, and to reduce EMI emissions.

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Figure 39: DOCSIS Module Removal

Remove an HFC Connector Module

This section describes the procedure for removing an HFC Connector Module. This module is hot-swappable which means that the system can remain powered up while it is being removed or installed.

1. Disconnect all cables that are attached to the module ports. If appropriate, label or tag each cable with its corresponding module port.

2. Loosen the two retainer screws.

3. Press upward and downward on the ejector releases (action #1 in Figure 40 on page 166).

4. Simultaneously pull the ejectors away from the module faceplate. The ejectors should rest at approximately 45° from their locked position. At this point, the HFC Connector Module is physically and electrically removed from its connectors on the midplane.

5. Slowly slide the module out of its slot until it is fully removed from the system.

21

1 2

3

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G10 CMTS Installation and Operation166

6. Insert the module into an anti-static bag being careful to avoid directly touching any component on the module. Handling the module only by its card edges or ejectors is highly recommended.

7. If the module will not be replaced, an air management panel that covers the module slot must be installed in its place. Tighten the two retainer screws by applying 3 in-lb of torque to each screw.

Figure 40: HFC Connector Module Removal

3

Eth0

Eth1

US 3

US 2

US 1

US 0

DS 3

DS 2

DS 1

DS 01

1

2

2

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Maintenance and Upgrades

Module Removal

167

Remove a Chassis Control Module

This section describes the procedure for removing a Chassis Control Module. This module is considered hot-swappable only when operating with a redundant Chassis Control Module, in which case the system can remain powered up while it is being removed or installed. See “Replace the Primary Chassis Control Module” on page 172 for information regarding Chassis Control Module redundancy.

1. Loosen the two retainer screws.

2. Press upward and downward on the ejector releases (this step is similar to action #1 in Figure 39 on page 165 for a DOCSIS Module), but do not pull on the ejectors until the blue Hot Swap LED on the faceplate is illuminated (see Figure 31 on page 82).

3. After the Hot Swap LED is illuminated, simultaneously pull the ejectors away from the module faceplate. The ejectors should rest at approximately 45° from the faceplate. At this point, the Chassis Control Module is physically and electrically removed from its connectors on the midplane.

4. Slowly slide the module out of its slot until it is fully removed from the system.

5. Insert the module into an anti-static bag being careful to avoid directly touching any component on the module. Handling the module only by its card edges or ejectors is highly recommended.

6. If the module will not be replaced, an air management module that covers the module slot must be installed in its place (the procedure for installing this module is the same procedure as installing a NIC Module; see “Install a Chassis Control Module” on page 56).

Remove a CCM Access Module

This section describes the procedure for removing a CCM Access Module. This module is hot-swappable which means that the system can remain powered up while it is being removed or installed.

1. Disconnect all cables that are attached to the module ports. If appropriate, label or tag each cable with its corresponding module port.

2. Loosen the two retainer screws.

3. Press upward and downward on the ejector releases (this step is similar to action #1 in Figure 40 on page 166 for an HFC Connector Module).

4. Simultaneously pull the ejectors away from the module faceplate. The ejectors should rest at approximately 45° from their locked position. At this point, the CCM Access Module is physically and electrically removed from its connectors on the midplane.

5. Slowly slide the module out of its slot until it is fully removed from the system.

One of the ejector releases on the Chassis Control Module activates a microswitch that signals the module to condition itself for hot swapping.

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6. Insert the module into an anti-static bag being careful to avoid directly touching any component on the module. Handling the module only by its card edges or ejectors is highly recommended.

7. If the module will not be replaced, an air management panel that covers the module slot must be installed in its place. Tighten the two retainer screws by applying 3 in-lb of torque to each screw.

Remove a NIC Module

This section describes the procedure for removing a NIC Module. This module is hot-swappable which means that the system can remain powered up while it is being removed or installed.

1. Loosen the two retainer screws.

2. Press upward and downward on the ejector releases (this step is similar to action #1 in Figure 39 on page 165 for a DOCSIS Module), but do not pull on the ejectors until the blue Swp LED on the faceplate is illuminated (see Figure 25 on page 67).

3. After the Swp LED is illuminated, simultaneously pull the ejectors away from the module faceplate. The ejectors should rest at approximately 45° from the faceplate. At this point, the NIC Module is physically and electrically removed from its connectors on the midplane.

4. Slowly slide the module out of its slot until it is fully removed from the system.

5. Insert the module into an anti-static bag being careful to avoid directly touching any component on the module. Handling the module only by its card edges or ejectors is highly recommended.

6. If the module will not be replaced, an air management module that covers the module slot must be installed in its place (the procedure for installing this module is the same procedure as installing a NIC Module; see “Install a NIC Module” on page 57).

Remove a NIC Access Module

This section describes the procedure for removing a NIC Access Module. This module is hot-swappable which means that the system can remain powered up while it is being removed or installed.

1. Disconnect all cables that are attached to the module ports. If appropriate, label or tag each cable with its corresponding module port.

2. Loosen the two retainer screws.

3. Press upward and downward on the ejector releases (this step is similar to action #1 in Figure 40 on page 166 for an HFC Connector Module).

One of the ejector releases on the NIC Module activates a microswitch that signals the module to condition itself for hot swapping.

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Maintenance and Upgrades

Software Upgrade Procedure

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4. Simultaneously pull the ejectors away from the module faceplate. The ejectors should rest at approximately 45° from their locked position. At this point, the NIC Access Module is physically and electrically removed from its connectors on the midplane.

5. Slowly slide the module out of its slot until it is fully removed from the system.

6. Insert the module into an anti-static bag being careful to avoid directly touching any component on the module. Handling the module only by its card edges or ejectors is highly recommended.

If the module will not be replaced, an air management panel that covers the module slot must be installed in its place. Tighten the two retainer screws by applying 3 in-lb of torque to each screw.

Software Upgrade Procedure

You might need to upgrade software running on your G10 CMTS in order to enhance existing features, obtain new features, or to resolve previous software issues (contact your customer support center for the latest software release). The system apply and system commit commands are used to support software upgrades (see the G-series CMTS CLI and SNMP Reference for more information).

The G10 CMTS maintains up to three images in its internal archive. An image is defined as normal if it has been declared as such by the system commit command. The failsafe image is the image that was initially supplied by the factory and is never replaced. An upgrade image is a new software release that the CMTS has accepted for a trial by issuing the system apply upgrade command (with the name of the upgrade image file).

To perform the upgrade, you must download an upgrade software image onto the CMTS using FTP. Typically, a user is expected to apply the upgrade, reboot the CMTS, verify the operation of the upgrade, then commit the upgrade as the normal software image.

When two Chassis Control Modules are successfully running in a redundant configuration, performing a software upgrade of the primary Chassis Control Module also upgrades the secondary Chassis Control Module.

The system apply and system commit commands are top-level commands and require a privilege of ad-rw.

See the G10 CMTS software release notes for the latest information that might affect software upgrades for your particular software release.

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Download the Image

To download an upgrade software image onto the CMTS, you must FTP the file from a host to the CMTS. This can be performed by initiating the FTP transfer within a console, Telnet, or secure shell (SSH) session from the CMTS to the host, or from the host to the CMTS.

FTP Session From CMTS to Host

1. Copy the upgrade image file to a directory on a host machine.

2. Change to the root directory on the CMTS. This becomes the target directory for the file transfer from the host machine to the CMTS:

GX$root# cd /

3. Specify the host machine in the ftp command:

GX$root# ftp <ip-address>

4. Enter your username and password when prompted.

5. Change to the directory in which the upgrade image file resides:

ftp> cd <path>

path is the full path name to the upgrade image file.

6. Specify that the transfer is for a binary file:

ftp> bin

7. Copy the file from the host to the CMTS:

ftp> get <filename>

8. Close the FTP session:

ftp> bye

FTP Session From Host to CMTS

1. Copy the upgrade image file to a directory on a host machine.

2. On the host, change to the directory in which the upgrade image file resides (cd <path>).

3. Type ftp <ip-address>, where ip-address is the IP address of the CMTS.

4. Enter your CLI username at the user prompt of the CMTS.

5. Enter your CLI password at the password prompt of the CMTS. You should see the ftp> prompt.

6. Enter bin at the ftp> prompt.

7. Enter put <filename> at the ftp> prompt. This copies the upgrade image file to the root directory of the CMTS.

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Software Upgrade Procedure

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8. Enter bye at the ftp> prompt to close the FTP session.

Apply, Test, and Commit the Upgrade

After the upgrade software image is downloaded onto the CMTS, perform the following steps to apply the upgrade:

1. Issue the system apply upgrade command to allow the CMTS to check the file for compatibility and copy it into its internal archive for use at the next bootup:

GX$root# system apply upgrade /<filename>

The filename parameter must be specified with an absolute path.

2. Reboot the system to bootup using the upgrade image:

GX$root# reload

3. Verify the correct operation in the upgrade mode.

4. Either:

! Issue the system commit command to accept the upgrade image as the normal image:

GX$root# system commit

! Issue the system apply normal command to revert back to the earlier committed image:

GX$root# system apply normal

5. Verify the version of software running on the CMTS:

GX$root# show version

We recommend that you retain all upgrade image files (the files can be renamed or moved to any directory of your choice). This allows you the option of applying any of those retained upgrade images to the CMTS in the future. Although an upgrade image is copied to the G10 CMTS internal archive when the system apply upgrade command is issued, the archive should be considered a precaution against failures, and not a repository for multiple upgrade images. Any image files not needed can be deleted in the future.

The show upgrade-log command displays all the software upgrade log messages produced during the last four system reboots. Software upgrade monitoring messages are displayed on the serial console, and are logged to /log/Upgrade.log. After each system reboot, the /log/Upgrade.log file is renamed to /log/Upgrade.log.1, and a new /log/Upgrade.log file is created. This cycling of log files keeps a history of up to four system reboots (up to /log/Upgrade.log.3). In addition, software upgrade messages are logged in the local event log, and the corresponding SNMP traps are generated (if enabled).

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Replace the Primary Chassis Control Module

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Replace the Primary Chassis Control Module

This section describes the procedure for replacing a failed primary Chassis Control Module from slot 6 after the CMTS has performed a switchover from the primary Chassis Control Module to the secondary Chassis Control Module. A switchover generates an event that is logged in the local event log. The following procedure assumes the CMTS is powered up.

1. Remove the failed primary module from slot 6 of the chassis as described in “Remove a Chassis Control Module” on page 167.

2. Install a new primary module in slot 6 of the chassis as described in “Install a Chassis Control Module” on page 56.

3. Copy the configuration files from the secondary module to the primary module:

GX$root# request chassis ccm config-sync-primary

4. If the subscriber account management billing feature is enabled, copy the billing files from the secondary module to the primary module:

GX$root# request chassis ccm billing-sync-primary

5. Reboot the CMTS to perform a switchback to the replaced primary module.

GX$root# reload

6. Check the version of software installed on the primary and secondary Chassis Control Modules:

GX$root# show version

If the version of software running on the two modules is exactly the same, redundancy is enabled, and no further configuration is necessary. If the software versions are different, proceed to Step 7 of the procedure.

7. Upgrade (or downgrade) the software on the primary module to the version running on the secondary module to enable redundancy. See “Software Upgrade Procedure” on page 169 for instructions on upgrading the software.

See the G10 CMTS Functional Description and G-series CMTS CLI and SNMP Reference for more information regarding Chassis Control Module redundancy.

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173

Part 3Appendixes

! Agency Certifications on page 175

! Headend Architecture on page 177

! G10 CMTS Local Log Events on page 179

! Field Replaceable Units on page 183

! Radio Frequency (RF) Specifications on page 185

! Coaxial Cable Requirements on page 189

! GBIC Interface Specifications on page 191

! EIA Channel Plans on page 193

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Agency Certifications 175

Appendix AAgency Certifications

This appendix lists agency compliance and certifications for the G10 CMTS.

Safety

! UL 60950 (US, Canada)

! EN 60950 (Europe)

! This equipment is intended only for installation in a restricted access location within a building.

! This equipment is intended for indoor use only.

! This equipment does not have a direct copper connection to the outside plant.

! Removal of power supplies or cards will result in access to hazardous energy.

! Each power cord must be connected to an independent branch circuit.

! Product connected to two power sources. Disconnect both power sources before servicing.

Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries according to the instructions.

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Agency Certifications

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EMC

! FCC Part 15, Class A (US)

! ICES–003, Class A (Canada)

! EN 55022, Class A (Europe)

Immunity

! EN 55024

! EN 61000–4–2 (ESD)

! EN 61000–4–3 (RF Field, AM)

! EN 61000–4–4 (EFT)

! EN 61000–4–5 (Surge)

! EN 61000–4–6 (RF Conducted Continuous)

! EN 61000–4–11 (Voltage Dips and Interrupts)

! EN 61000–3–3 (Flicker)

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

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Headend Architecture 177

Appendix BHeadend Architecture

Figure 41 on page 178 illustrates a typical cable headend architecture.

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Figure 41: Headend Architecture

FiberUp

High-speedData

Telephony

Data

Video

Combinerand

SignalRouter

Audio / VideoDemod

BackboneTransportAdapter,Switch,LAN, or

Hub

LocalServerFacility

RemoteDial-UpAccessServer

InteractiveCable

Gateway

RemoteServerFacility

PSTN

Broadcast Channels:Satellite, Fiber,

Cable,Others

Upconverter

Upconverter

Upconverter

ATM

Splitter

AnalogVideo

DigitalVideo

Other

Combiner

54-750 MHz

5-42 MHz

BackboneNetwork

Head End

FiberDown

E/O O/E

Coax Cable

NetworkTermination

Demod

Mod

Upconverters

QAMData

OperationsSystemSupport

Security &AccessControl

CMTS

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G10 CMTS Local Log Events 179

Appendix CG10 CMTS Local Log Events

Table 40 lists the Juniper Networks-specific local log events for the G10 CMTS. The local event log of the CMTS corresponds to the docsDevEventTable within the DOCSIS Cable Device MIB (RFC2669). See “Local Event Log” on page 142 for information on displaying the local log and controlling Juniper Networks-specific events and traps.

Following is an explanation of each column in Table 40:

! Event Class—events are categorized into Juniper Networks-specific event classes: ENVMON, CHASSIS, SOFTWARE, ACCESS, CONFIG, DATAPATH, RFINTERFACE, and FLAPLIST.

! Event Priority—corresponds to docsDevEvLevel in RFC2669 and represents the priority level of the event. The priority levels, from most serious to least, are: emergency, alert, critical, error, warning, notice, information, and debug. See the DOCSIS OSSI specification for definitions of the standard DOCSIS CMTS events.

! Event Message—corresponds to docsDevEvText in RFC2669 and provides a text description of the event. The event message contained in Table 40 is sometimes followed by additional text that provides more information regarding the event.

! Event ID—corresponds to docsDevEvId in RFC2669, which is a unique 32-bit identifier (displayed as decimal) used by the G10 CMTS for the event.

! Trap Name—corresponds to the name of the trap that is generated (if enabled) when the event occurs.

Table 40: G10 CMTS Local Log Events

Event ClassEvent Priority Event Message Event ID Trap Name

ENVMON Emergency Thermal Shutdown 2539850101 Environment Monitoring Trap

ENVMON Emergency Firestop 2539850102 Environment Monitoring Trap

ENVMON Warning Single fan failure 2539850103 Environment Monitoring Trap

ENVMON Critical Multiple fan failure 2539850104 Environment Monitoring Trap

ENVMON Warning Power supply degraded 2539850105 Environment Monitoring Trap

ENVMON Critical Power supply failed 2539850106 Environment Monitoring Trap

ENVMON Warning Ambient user high threshold reached, can rev up the fans 2539850107 Environment Monitoring Trap

ENVMON Critical Ambient user high threshold reached, cannot rev up the fans 2539850108 Environment Monitoring Trap

ENVMON Information Ambient user low threshold reached 2539850109 Environment Monitoring Trap

CHASSIS Information Module inserted 2539850201 Chassis Trap

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CHASSIS Information Module removed 2539850202 Chassis Trap

CHASSIS Critical Module: unexpected shutdown or crash 2539850203 Chassis Trap

CHASSIS Information Module went online 2539850204 Chassis Trap

CHASSIS Information Module went offline 2539850205 Chassis Trap

CHASSIS Critical Module failed to start 2539850206 Chassis Trap

CHASSIS Error Interface/Channel failed to start 2539850207 Chassis Trap

CHASSIS Alert,Notice

Disk space 2539850208 Chassis Trap

CHASSIS Critical,Warning,Notice

Reload or reset LC 2539850209 Chassis Trap

CHASSIS Warning Billing 75% space reached 2539850210 Chassis Trap

CHASSIS Critical Billing space full 2539850211 Chassis Trap

CHASSIS Critical Possible loss of billing data 2539850212 Chassis Trap

CHASSIS Information Standby CCM present 2539850244 Chassis Trap

CHASSIS Information Standby CCM online 2539850245 Chassis Trap

CHASSIS Error Standby CCM failed to start 2539850246 Chassis Trap

CHASSIS Error Primary CCM failed to start 2539850247 Chassis Trap

CHASSIS Error Primary CCM failed 2539850248 Chassis Trap

CHASSIS Warning Standby CCM active 2539850249 Chassis Trap

CHASSIS Error Standby CCM failed 2539850250 Chassis Trap

CHASSIS Information CCM requested to switch to standby 2539850251 Chassis Trap

CHASSIS Information Request to switch to standby CCM cancelled 2539850252 Chassis Trap

CHASSIS Notice CCM switched over to standby 2539850253 Chassis Trap

CHASSIS Warning Replace failed CCM module 2539850254 Chassis Trap

CHASSIS Error Synchronize software on standby CCM module 2539850255 Chassis Trap

CHASSIS Notice aggEthernet link reconfigured 2539850260 Chassis Trap

SOFTWARE Information Apply successful 2539850301 Software Trap

SOFTWARE Information Commit successful 2539850302 Software Trap

SOFTWARE Notice Apply failed 2539850303 Software Trap

SOFTWARE Critical Install failed 2539850304 Software Trap

SOFTWARE Information Install success 2539850305 Software Trap

SOFTWARE Information Line card authorization successful 2539850306 Software Trap

SOFTWARE Notice Line card authorization unsuccessful 2539850307 Software Trap

SOFTWARE Warning Line card authorization option is corrupted 2539850308 Software Trap

SOFTWARE Critical Operational failure 2539850309 Software Trap

SOFTWARE Information Apply cancelled 2539850310 Software Trap

ACCESS Information CLI session begin 2539850401 Access Trap

ACCESS Information CLI session end 2539850402 Access Trap

ACCESS Information CLI session timeout 2539850403 Access Trap

ACCESS Warning CLI auth failure – superuser 2539850404 Access Trap

ACCESS Notice CLI auth failure – non-superuser 2539850405 Access Trap

CONFIG Information Startup config changed 2539850501 Config Trap

CONFIG Information DateTime changed 2539850502 Config Trap

Event ClassEvent Priority Event Message Event ID Trap Name

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G10 CMTS Local Log Events 181

G10 CMTS Local Log Events

CONFIG Warning Config Apply process had failure 2539850503 Config Trap

CONFIG Information Startup file missing 2539850504 Config Trap

CONFIG Critical Corrupt startup file 2539850505 Config Trap

CONFIG Critical Persistent configuration file corrupted: <config-file-name> 2539850506 Config Trap

CONFIG Critical Version mismatch: non-recoverable 2539850507 Config Trap

CONFIG Information Version mismatch: recoverable 2539850508 Config Trap

CONFIG Information Flaplist configuration change 2539850509 Config Trap

CONFIG Information Spectrum monitor configuration change 2539850510 Config Trap

DATAPATH Information Unverifiable IP address <ip-addr> received from CPE MAC <cpe-mac-addr>. CM MAC <cm-mac-addr>

2539850601 Datapath Trap

DATAPATH Information Invalid IP address <ip-addr>, MAC address <cpe-mac-addr> received from CM MAC <cm-mac-addr>. The IP address is owned by MAC address <aat-mac-addr> behind CM MAC <aat-cm-mac-addr>

2539850602 Datapath Trap

DATAPATH Information Invalid CPE IP <ip-addr>, MAC <cpe-mac-addr> from CM <cm-mac-addr>, address not allocated

2539850603 Datapath Trap

RFINTERFACE Warning US <slot>/<US nbr> changed from <XX.XX> MHz, <S1> ksymb/s, profile <P1> to <YY.YY> MHz, <S2> ksymb/s, profile <P2>

2539850701 RfInterface Trap

FLAPLIST Notice CM added to flaplist on cable interface <slot/interface>, CM Mac <cm-MAC-addr>, Upstream Ch <usIfIndex>, Upstream Port <port>,Condition: <cause>

2539850801 FlapList Trap

FLAPLIST Information CM aged/cleared out of flaplist on cable interface <slot/interface>, CM Mac <cm-MAC-addr>, Upstream Ch <usIfIndex>, Upstream Port <port>

2539850802 FlapList Trap

FLAPLIST Information CM flapped on cable interface <slot/interface>, CM Mac <cm-MAC-addr>, Upstream Ch <usIfIndex>, Upstream Port <port>,Condition: <cause>

2539850803 FlapList Trap

DEBUG Warning Initial RNG-REQ with invalid channel ID from CM <cm-MAC-addr> 2539850901 Debug Trap

CMSTATECHANGE Information CM Registration Mac addr: <cm-MAC-addr>, US-Chan-IfIndex <usIfIndex>, DS-Chan-Index: <dsIfIndex>

2539851001 CmStateChange Trap

CMSTATECHANGE Information CM De-ranging Mac addr: <cm-MAC-addr>>, US-Chan-IfIndex <ifIndex>, Cause: <Cause>

2539851002 CmStateChange Trap

CMSTATECHANGE Inform CM US Channel Change Mac addr: <cm-MAC-addr> 2539851003 CmStateChange Trap

Event ClassEvent Priority Event Message Event ID Trap Name

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Field Replaceable Units 183

Appendix DField Replaceable Units

This appendix lists the complete set of field replaceable units (FRU) within the G10 CMTS. A FRU can be ordered as a separate unit for replacement into the CMTS, or for purposes of stocking spare parts.

Following is an alphabetical list of G10 CMTS FRUs. See “G10 CMTS Hardware Overview” on page 7 for a description of each FRU.

! AC Power Supply

! AC Power Transition Module

! Air Management Module

! Air Management Panel

! CCM Access Module

! Chassis

! Chassis Control Module

! DOCSIS Module

! DC Power Supply

! DC Power Transition Module

! Front Fan Tray

! GBIC Module

! HFC Connector Module

! NIC Module

! NIC Access Module

! NIC Access Module Cable

! Power Supply Filler Panel

! Rear Fan Tray

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Radio Frequency (RF) Specifications 185

Appendix ERadio Frequency (RF) Specifications

For reference purposes, Table 41 through Table 45 are reproduced from the CableLabs DOCSIS Radio Frequency Interface Specification, SP-RFI-I05-991105. For the complete DOCSIS specifications, please see the appropriate CableLabs document.

Table 41: Downstream RF Channel Transmission Characteristics

Parameter Value

Frequency range Cable system normal downstream operating range is from 50 MHz to as high as 860 MHz. However, the values in this table apply only at frequencies >= 88 MHz.

RF channel spacing (design bandwidth) 6 MHz

Transit delay from headend to most distant customer <= 0.800 msec (typically much less)

Carrier-to-noise ratio in a 6-MHz band (analog video level) Not less than 35 dB4

Carrier-to-interference ratio for total power (discrete and broadband ingress signals)

Not less than 35 dB within the design bandwidth

Composite triple beat distortion for analog modulated carriers Not greater than -50 dBc within the design bandwidth

Composite second order distortion for analog odulated carriers Not greater than -50 dBc within the design bandwidth

Cross-modulation level Not greater than -40 dBc within the design bandwidth

Amplitude ripple 0.5 dB within the design bandwidth

Group delay ripple in the spectrum occupied by the CMTS 75 ns within the design bandwidth

Micro-reflections bound for dominant echo -10 dBc @ <= 0.5 m sec, -15 dBc @ <= 1.0 m sec-20 dBc @ <= 1.5 m sec, -30 dBc @ > 1.5 m sec

Carrier hum modulation Not greater than -26 dBc (5%)

Burst noise Not longer than 25 m sec at a 10 Hz average rate

Seasonal and diurnal signal level variation 8 dB

Signal level slope, 50-750 MHz 16 dB

Maximum analog video carrier level at the CM input, inclusive of above signal level variation

17 dBmV

Lowest analog video carrier level at the CM input, inclusive of above signal level variation

-5 dBmV

1. Transmission is from the headend combiner to the CM input at the customer location.2. For measurements above the normal downstream operating frequency band (except hum), impairments are referenced to the

highest-frequency NTSC carrier level.3. For hum measurements above the normal downstream operating frequency band, a continuous-wave carrier is sent at the test frequency

at the same level as the highest-frequency NTSC carrier.4. This presumes that the digital carrier is operated at analog peak carrier level. When the digital carrier is operated below the analog peak

carrier level, this C/N may be less.5. Measurement methods defined in [NCTA] or [CableLabs2].

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Table 42: Upstream RF Channel Transmission Characteristics

Table 43: Downstream RF Signal Output Characteristics

Parameter Value

Frequency range 5 to 42 MHz edge to edge

Transit delay from the most distant CM to the nearest

CM or CMTS

<= 0.800 msec (typically much less)

Carrier-to-noise ratio Not less than 25 dB

Carrier-to-ingress power (the sum of discrete and

broadband ingress signals) ratio

Not less than 25 dB2

Carrier- to-interference (the sum of noise, distortion, common-path distortion and cross-modulation) ratio

Not less than 25 dB

Carrier hum modulation Not greater than -23 dBc (7.0%)

Burst noise Not longer than 10 msec at a 1 kHz average rate for most cases3,4,5

Amplitude ripple 5-42 MHz: 0.5 dB/MHz

Group delay ripple 5-42 MHz: 200 ns/MHz

Micro-reflections -- single echo -10 dBc @ <= 0.5 m sec-20 dBc @ <= 1.0 m sec-30 dBc @ > 1.0 m sec

Seasonal and diurnal signal level variation Not greater than 8 dB min to max

1. Transmission is from the CM output at the customer location to the headend.2. Ingress avoidance or tolerance techniques MAY be used to ensure operation in the presence of time-varying discrete ingress signals that

could be as high as 0 dBc [CableLabs1].3. Amplitude and frequency characteristics sufficiently strong to partially or wholly mask the data carrier.4. CableLabs report containing distribution of return-path burst noise measurements and measurement method is forthcoming.5. Impulse noise levels more prevalent at lower frequencies (< 15 MHz).

Parameter Value

Center Frequency (fc) 91 to 857 MHz ± 30 kHz1

Level Adjustable over the range 50 to 61 dBmV

Symbol Rate (nominal)64QAM256QAM

5.056941 Msym/sec5.360537 Msym/sec

Nominal Channel Spacing 6 MHz

Frequency response64QAM256QAM

~18% Square Root Raised Cosine shaping~12% Square Root Raised Cosine shaping

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Radio Frequency (RF) Specifications 187

Radio Frequency (RF) Specifications

Table 44: DOCSIS Downstream Channel Rates and Spacing

Table 45: DOCSIS Maximum Upstream Channel Rates and Widths

Total Discrete Spurious Inband (fc ± 3 MHz)

Inband Spurious and Noise (fc ± 3 MHz)

Adjacent channel (fc ± 3.0 MHz) to (fc ± 3.75 MHz)

Adjacent channel (fc ± 3.75 MHz) to (fc ± 9 MHz)

Next adjacent channel (fc ± 9 MHz) to (fc ± 15 MHz)

Other channels (47 MHz to 1,000 MHz)

< -57dBc

< -48dBc; where channel spurious and noise includes all discrete spurious, noise, carrier leakage, clock lines, synthesizer products, and other undesired transmitter products. Noise within +/- 50kHz of the carrier is excluded.

< -58 dBc in 750 kHz

< -62 dBc, in 5.25 MHz, excluding up to 3 spurs, each of which must be <-60 dBc when measured in a 10 kHz band

Less than the greater of -65 dBc or -12dBmV in 6MHz, excluding up to three discrete spurs. The total power in the spurs must be < -60dBc when each is measured with 10 kHz bandwidth.

< -12dBmV in each 6 MHz channel, excluding up to three discrete spurs. The total power in the spurs must be < -60dBc when each is measured with 10kHz bandwidth.

Phase Noise 1 kHz - 10 kHz: -33dBc double sided noise power

10 kHz - 50 kHz: -51dBc double sided noise power

50 kHz - 3 MHz: -51dBc double sided noise power

Output Impedance 75 ohms

Output Return Loss > 14 dB within an output channel up to 750 MHz; > 13 dB in an output channel above 750 MHz

Connector F connector per [IPS-SP-406]

1. ±30 kHz includes an allowance of 25 kHz for the largest FCC frequency offset normally built into upconverters.

Nominal Symbol Rate(Msym/sec)

Nominal Channel Spacing(kHz) Bit Rate (bps)

5.056941 (64QAM) 6000 30,341,646

5.360537 (256QAM) 6000 42,884,296

Symbol Rate(ksym/sec)

Channel Width(kHz)1

Bit-rate/sec(QPSK)

Bit-rate/sec(16QAM)

160 200 320,000 640,000

320 400 640,000 1,280,000

640 800 1,280,000 2,560,000

1,280 1,600 2,560,000 5,120,000

2,560 3,200 5,120,000 10,240,000

1. Channel width is the -30 dB bandwidth.

Parameter Value

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Coaxial Cable Requirements 189

Appendix FCoaxial Cable Requirements

To achieve optimal RF performance, and to minimize the potential damage of the F-connectors on the HFC Connector Modules, Juniper Networks recommends that the coaxial cable types listed in Table 46 be used.

Table 46: Coaxial Cable Requirements

Any of the cable types listed in Table 46 can be used initially. However, if a cable in a particular F-connector is replaced, we recommend that the replacement cable have the same, or larger, center conductor diameter than the original cable. This ensures that proper contact between the cable conductor and an F-connector will be maintained.

If a replacement cable has a smaller center conductor diameter than the original cable—for example, replacing an RG-6 cable with an RG-59U—the smaller RG-59U cable conductor might not make adequate contact with an F-connector, which can potentially lead to a partial or complete loss of the signal.

Cable Type Diameter of Center Conductor

RG-59/U 0.57 mm (0.022 in)

RG-59 0.86 mm (0.034 in)

RG-6 1.05 mm (0.041 in)

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GBIC Interface Specifications 191

Appendix GGBIC Interface Specifications

The specifications for the various GBIC interfaces provided by the NIC Module are listed in Table 47 through Table 50.

Table 47: Single Mode, Long Range GBIC Specifications

Table 48: Single Mode, Midrange GBIC Specifications

Parameter Value

Transmitter type Longwave laser, 1550 nm

Range 80 Km

Data Rate (nominal) 1.0625 to 1.250 Gbps

Average launch power -4 dBm min.-1 dBm max.

Transmitter extinction ratio 9 dB min.

Data format 8B / 10B

Average receive power -25.5 dBm min.-1 dBm max.

Connector Duplex SC

Regulatory Class 1 devices per FDA/CDRH and IEC-825-1 laser safety regulations

Parameter Value

Transmitter type Longwave laser, 1310 nm

Range 10 Km

Data Rate (nominal) 1.0625 to 1.250 Gbps

Average launch power -8 dBm min.-3 dBm max.

Transmitter extinction ratio 9 dB min.

Data format 8B / 10B

Average receive power -19 dBm min.-26.5 dBm typical-3 dBm max.

Connector Duplex SC

Regulatory Class 1 devices per FDA/CDRH and IEC-825-1 laser safety regulations

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Table 49: Multi-Mode GBIC Specifications

Table 50: 1000BT GBIC Specifications

Parameter Value

Transmitter type Shortwave laser, 850 nm

Range 550 m

Data Rate (nominal) 1.0625 to 1.250 Gbps

Average launch power (62.5 µm MMF)

-9.5 dBm min.-5 dBm max.

Transmitter extinction ratio 9 dB min.

Data format 8B / 10B

Average receive sensitivity -22 dBm typical-20.5 dBm max.

Connector Duplex SC

Total Tx jitter contribution 45 psec typical

Total Tx+Rx jitter contribution 50 psec typical

Output rise/fall time 120 psec typical

Regulatory Class 1 devices per FDA/CDRH and IEC-825-1 laser safety regulations

Parameter Value

Data Rate 1000BaseT

Connector RJ-45

Transmitter type CAT 5 twisted pair

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EIA Channel Plans 193

Appendix HEIA Channel Plans

Table 51 lists the EIA (Electronic Industries Association) standard, IRC (Incrementally Related Carrier), and HRC (Harmonically Related Carrier) frequency plans.

The frequencies in Table 51 represent the video center frequencies. Add 1.75 MHz to calculate the DOCSIS center frequency.

Table 51: EIA Channel Plan

Channel STD IRC HRC

T-7 7.0000

T-8 13.0000

T-9 19.0000

T-10 25.0000

T-11 31.0000

T-12 37.0000

T-13 43.0000

1 / A-8 73.2625 72.0036

2 55.2500 55.2625 54.0027

3 61.2500 61.2625 60.0030

4 67.2500 67.2625 66.0033

5 / A-7 77.2500 79.2625 78.0039

6 / A-6 83.2500 85.2625 84.0042

7 175.2500 175.2625 174.0087

8 181.2500 181.2625 180.0090

9 187.2500 187.2625 186.0093

10 193.2500 193.2625 192.0096

11 199.2500 199.2625 198.0099

12 205.2500 205.2625 204.0102

13 211.2500 211.2625 210.0105

14 / A 121.2625 121.2625 120.0060

15 / B 127.2625 127.2625 126.0063

16 / C 133.2625 133.2625 132.0066

17 / D 139.2500 139.2625 138.0069

18 / E 145.2500 145.2625 144.0072

19 / F 151.2500 151.2625 150.0075

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20 / G 157.2500 157.2625 156.0078

21 / H 163.2500 163.2625 162.0081

22 / I 169.2500 169.2625 168.0084

23 / J 217.2500 217.2625 216.0108

24 / K 223.2500 223.2625 222.0111

25 / L 229.2625 229.2625 228.0114

26 / M 235.2625 235.2625 234.0117

27 / N 241.2625 241.2625 240.0120

28 / O 247.2625 247.2625 246.0123

29 / P 253.2625 253.2625 252.0126

30 / Q 259.2625 259.2625 258.0129

31 / R 265.2625 265.2625 264.0132

32 / S 271.2625 271.2625 270.0135

33 / T 277.2625 277.2625 276.0138

34 / U 283.2625 283.2625 282.0141

35 / V 289.2625 289.2625 288.0144

36 / W 295.2625 295.2625 294.0147

37 / AA 301.2625 301.2625 300.0150

38 / BB 307.2625 307.2625 306.0153

39 / CC 313.2625 313.2625 312.0156

40 / DD 319.2625 319.2625 318.0159

41 / EE 325.2625 325.2625 324.0162

42 / FF 331.2750 331.2750 330.0165

43 / GG 337.2625 337.2625 336.0168

44 / HH 343.2625 343.2625 342.0171

45 / II 349.2625 349.2625 348.0174

46 / JJ 355.2625 355.2625 354.0177

47 / KK 361.2625 361.2625 360.0180

48 / LL 367.2625 367.2625 366.0183

49 / MM 373.2625 373.2625 372.0186

50 / NN 379.2625 379.2625 378.0189

51 / OO 385.2625 385.2625 384.0192

52 / PP 391.2625 391.2625 390.0195

53 / QQ 397.2625 397.2625 396.0198

54 / RR 403.2500 403.2625 402.0201

55 / SS 409.2500 409.2625 408.0204

56 / TT 415.2500 415.2625 414.0207

57 / UU 421.2500 421.2625 420.0210

58 / VV 427.2500 427.2625 426.0213

59 / WW 433.2500 433.2625 432.0216

60 / XX 439.2500 439.2625 438.0219

61 / YY 445.2500 445.2625 444.0222

62 / ZZ 451.2500 451.2625 450.0225

Channel STD IRC HRC

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EIA Channel Plans 195

EIA Channel Plans

63 / AAA 457.2500 457.2625 456.0228

64 / BBB 463.2500 463.2625 462.0231

65 / CCC 469.2500 469.2625 468.0234

66 / DDD 475.2500 475.2625 474.0237

67 / EEE 481.2500 481.2625 480.0240

68 / FFF 487.2500 487.2625 486.0243

69 / GGG 493.2500 493.2625 492.0246

70 / HHH 499.2500 499.2625 498.0249

71 / III 505.2500 505.2625 504.0252

72 / JJJ 511.2500 511.2625 510.0255

73 / KKK 517.2500 517.2625 516.0258

74 / LLL 523.2500 523.2625 522.0261

75 / MMM 529.2500 529.2625 528.0264

76 / NNN 535.2500 535.2625 534.0267

77 / OOO 541.2500 541.2625 540.0270

78 / PPP 547.2500 547.2625 546.0273

79 / QQQ 553.2500 553.2625 552.0276

80 / RRR 559.2500 559.2625 558.0279

81 / SSS 565.2500 565.2625 564.0282

82 / TTT 571.2500 571.2625 570.0285

83 / UUU 577.2500 577.2625 576.0288

84 / VVV 583.2500 583.2625 582.0291

85 / WWW 589.2500 589.2625 588.0294

86 / XXX 595.2500 595.2625 594.0297

87 / YYY 601.2500 601.2625 600.0300

88 / ZZZ 607.2500 607.2625 606.0303

89 613.2500 613.2625 612.0306

90 619.2500 619.2625 618.0309

91 625.2500 625.2625 624.0312

92 631.2500 631.2625 630.0315

93 637.2500 637.2625 636.0318

94 643.2500 643.2625 642.0321

95 / A-5 91.2500 91.2625 90.0045

96 / A-4 97.2500 97.2625 96.0048

97 / A-3 103.2500 103.2625 102.0051

98 / A-2 109.2750 109.2750 108.0054

99 / A-1 115.2750 115.2750 114.0057

100 649.2500 649.2625 648.0324

101 655.2500 655.2625 654.0327

102 661.2500 661.2625 660.0330

103 667.2500 667.2625 666.0333

104 673.2500 673.2625 672.0336

105 679.2500 679.2625 678.0339

Channel STD IRC HRC

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106 685.2500 685.2625 684.0342

107 691.2500 691.2625 690.0345

108 697.2500 697.2625 696.0348

109 703.2500 703.2625 702.0351

110 709.2500 709.2625 708.0354

111 715.2500 715.2625 714.0357

112 721.2500 721.2625 720.0360

113 727.2500 727.2625 726.0363

114 733.2500 733.2625 732.0366

115 739.2500 739.2625 738.0369

116 745.2500 745.2625 744.0372

117 751.2500 751.2625 750.0375

118 757.2500 757.2625 756.0378

119 763.2500 763.2625 762.0381

120 769.2500 769.2625 768.0384

121 775.2500 775.2625 774.0387

122 781.2500 781.2625 780.0390

123 787.2500 787.2625 786.0393

124 793.2500 793.2625 792.0396

125 799.2500 799.2625 798.0399

126 805.2500 805.2625 804.0402

127 811.2500 811.2625 810.0405

128 817.2500 817.2625 816.0408

129 823.2500 823.2625 822.0411

130 829.2500 829.2625 828.0414

131 835.2500 835.2625 834.0417

132 841.2500 841.2625 840.0420

133 847.2500 847.2625 846.0423

134 853.2500 853.2625 852.0426

135 859.2500 859.2625 858.0429

136 865.2500 865.2625 864.0432

137 871.2500 871.2625 870.0435

138 877.2500 877.2625 876.0438

139 883.2500 883.2625 882.0441

140 889.2500 889.2625 888.0444

141 895.2500 895.2625 894.0447

142 901.2500 901.2625 900.0450

143 907.2500 907.2625 906.0453

144 913.2500 913.2625 912.0456

145 919.2500 919.2625 918.0459

146 925.2500 925.2625 924.0462

147 931.2500 931.2625 930.0465

148 937.2500 937.2625 936.0468

Channel STD IRC HRC

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EIA Channel Plans 197

EIA Channel Plans

149 943.2500 943.2625 942.0471

150 949.2500 949.2625 948.0474

151 955.2500 955.2625 954.0477

152 961.2500 961.2625 960.0480

153 967.2500 967.2625 966.0483

154 973.2500 973.2625 972.0486

155 979.2500 979.2625 978.0489

156 985.2500 985.2625 984.0492

157 991.2500 991.2625 990.0495

158 997.2500 997.2625 996.0498

159 1003.250 1003.2625 1002.0501

Channel STD IRC HRC

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199

Part 4Index

! Index on page 201

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Index 201

IndexIndex

Numerics10/100BASE ................................................................5916QAM..............................................................102, 1031-Gigabit......................................................................66256QAM....................................................................15464QAM..............................................................154, 156802.3ad.......................................................................66

Aaccessory kit................................................................35agency certifications..................................................175air exhaust ............................................................14, 40air intake .........................................................13, 40, 78

faceplate ......................................................13, 161faceplate clip ................................................13, 161

air management module 7, 13, 36, 37, 51, 78, 164, 167, 168

air management panel ...7, 14, 36, 37, 51, 78, 166, 168, 169

air ventilation ..............17, 35, 41, 48, 78, 159, 160, 164alarm cutoff.................................................................81amplification .............................................................140attenuation ........................................................140, 155authentication ...........................................................150autosensing .................................................................73

Bbandwidth .................................................................151banner.........................................................................99BIOS..........................................................................148Bits per second............................................................84block upconversion ...................................................141Broadband Cable Processor ASIC ..................................5

Ccablechannel ..............................................13, 37, 64, 66coaxial..............................................59, 60, 62, 189guide ....................................................................13Network Access Module .......................................37

optical ..................................................................66plant.....................................................................60

cable interface .............................................................85card

cage......................................................................56guide ................................13, 17, 46, 52, 55, 57, 59slot .......................................................................54

CATV mode ...............................................................127CCCM ........................................................................154CCM Access Module.............................7, 14, 56, 57, 167CER ...........................................................................146certifications..............................................................175channel........................................................................59

downstream ...............................................149, 155upstream............................................146, 149, 153width....................................................................90

chassis.......................................7, 14, 39, 42, 51, 73, 74air ventilation .......................................................78ground nuts ....................................................14, 39grounding.............................................................17installing modules ..........................................51–59lifting....................................................................15mounting..............................................................40

Chassis Control Module 7, 13, 56, 72, 81, 147, 148, 160, 167

Class of Service..........................................................151CLI see Command-Line Interfaceclock............................................................................98codeword ..................................................................156Codeword Error Ratio................................................146Command-Line Interface .............................................84common path distortion ............................................140concatenation................................................................5configuration ...............................................................85configuration file .......................................................151

invalid ................................................................150issues .........................................................140, 150name..................................................................150receiving.............................................................150

congestion .................................................................153correction factor ........................................................130counter

CER ............................................................141, 156FAdj............................................................141, 156

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IM ..............................................................149, 150PAdj ................................................................... 141SM .....................................................................156

CPE ...................................................................114, 154

Ddata backoff ................................................................ 91Data bits...................................................................... 84date.............................................................................98DB-25.......................................................................... 72DB-9............................................................................ 72debug ........................................................................ 135decryption.....................................................................5DHCP ........................................ 114, 140, 144, 149, 150directory.................................................................... 123

changing ............................................................ 123displaying ..........................................................123

DNS...........................................................................120DOCSIS

RFI Specifications...............................................185DOCSIS Module 7, 13, 51, 52, 62, 79, 91, 147, 148, 153,

154, 164document conventions............................................... xivDomain ...........................................................46, 51, 57Domain Name Server................................................ 120downstream.................................................... 59, 60, 89

Eejector ......................... 46, 52–54, 56–59, 164, 166–169encryption.....................................................................5equalization............................................................... 153equipment shelf .......................................................... 42ESD

ground strap .......................................... 17, 39, 157strap jack ....................................................... 17, 39strap plug ............................................................. 13

Ethernet .................................................... 59, 62, 66, 70

Ffan tray .................13, 14, 17, 38, 77, 78, 148, 160, 161Fast Ethernet............................................................... 91F-connector ............................................. 59, 60, 62, 189features .........................................................................4FEC ...........................................................................101fiberoptic link ............................................................ 140flap-list ..............................................................135, 156flow control ................................................................. 84forward error correction............................................ 101forward path .....................................................141, 154fragmentation ...............................................................5frequency stacking .................................................... 141FTP ...........................................................................170functional overview.......................................................3

GGBIC ................................................57, 58, 66, 191, 192GIADDR.....................................................................114ground...................................................................17, 52group delay variance .................................................140guard time.................................................................101

Hheadend ................................................................3, 146help .............................................................................97HFC Connector Module 7, 14, 51, 54, 55, 59–62, 69–70,

85, 91, 165HFC network .................................................................4hostname ....................................................................98hot insertion..............................................................148

I IEC ..............................................................................73impairment identification......................................7, 146ingress...................................................7, 140, 146, 156initial maintenance....................................................103interface ......................................................................85interleave depth ..........................................................89interleaver .................................................................156Interval Usage Code...................................................101IP address..........................................................149, 150IP connectivity...........................................................149

Llaser clipping .....................................................140, 141LED

ACO .....................................................................81Chassis Control Module ........................................81Critical..................................................................81DOCSIS Module....................................................79EXT FAULT...........................................................83EXT FLT ...............................................................83fan tray ......................................................148, 160FAULT ..................................................................78Fault...................................................................157front fan tray..................................................13, 78Hot Swap .................................79, 81, 83, 164, 167INT FAULT............................................................83INT FLT ................................................................83Major....................................................................81Minor ...................................................................81OK ...............................................................83, 147OPERATIONAL.............................................83, 147POWER ................................................................78Power...........................................................81, 157power supply .......................................................78PWR.....................................................................83rear fan tray ...................................................14, 78

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Index 203

Index

RTM .....................................................................83Swp....................................................................168Test ..............................................................79, 147

link aggregation...........................................................66load balancing ...........................................................153logout ..........................................................................84long data grant interval .............................................104

MMAC ..........................................................................155address ......................................................135, 143domain...............................................................149messages ...........................................................143

MAC domain ...............................................................85major components ........................................................5management .................................................................7MAP ..................................................................143, 155maxburst size ............................................................101Media Gateways ............................................................4MER ..........................................................................146Message Integrity Check............................................150MIC ...........................................................................150microreflections ....................................................7, 146midplane .........................................................13, 17, 47minislot size ................................................................91modulation ..........................................................89, 101modulation profile .....................101, 102, 103–104, 153module ejector rail...................13, 52, 55, 56, 57, 58, 59mounting bracket ........................................................42multicast packets.......................................................104

Nnetwork side interface ...................................................4NIC Access Module ..........7, 14, 59, 69, 70, 83, 147, 168NIC Module .............................7, 13, 57, 62, 66, 83, 147NMS ..........................................................................148node......................................................................60, 61

recombining.......................................................153noise .............................................7, 102, 140, 146, 156

cancellation........................................................153power.................................................................146power density ....................................................146

NSI ............................................................................154

Ooptical .........................................................................66over-current.................................................................81

PParity...........................................................................84password...............................................................88, 97PC .........................................................................72, 84

periodic ranging ........................................................155phase distortion.........................................................141ping ...........................................................................124policing......................................................................151port ...........................................................................153

1-Gigabit...............................................................66DB-25 ...................................................................72DB-9 .....................................................................72downstream ...................................................59, 60Ethernet .............................................59, 62, 66, 70F-connector ......................................59, 60, 62, 189GBIC .....................................................................66RJ-21 ....................................................................69RJ-45 ..............................................................62–70RS-232..................................................................72serial ..............................................................72, 84upstream..............................................................62

powerAC ......................................................................158adjustment .................................................135, 141cord................................................................16, 73DC......................................................................158issues .................................................................147level..............................................................90, 155redundant...........................................................157source ......................................73, 77, 78, 147, 157supply bay..........................................................148supply faceplate .................................................148supply LED .........................................................157switch.................................................................147transition module ...............................................157

power receptacleAC ..................................................................14, 73DC........................................................................14

power supply.................7, 13, 15, 35, 78, 148, 157, 158alignment .......................................................17, 46bay ...........................................................13, 46, 78ejector rail ......................................................13, 46faceplate.....13, 35, 41, 46, 48, 64, 66, 78, 158, 159faceplate clip ........................................................13failure...................................................................45filler panel ....................................7, 13, 46, 78, 159installation................................................39, 45, 48redundancy ..........................................................45removal ......................................................157, 159

power switch ...............................................................16AC ............................................................14, 73, 77

power transition module .............................................49AC ............................................................14, 73, 77DC........................................................................14

preamble ...................................................................101privilege.......................................................................97provisioning...............................105, 135, 141, 150, 153

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Index

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QQoS ...........................................................................151QPSK.................................................102, 103, 141, 153

Rrack mount............................................................15, 40range.................................................................149, 155range backoff .............................................................. 91ranging...................................................................... 135redundancy ..................................................... 73, 74, 78registration................................................................141request interval ......................................................... 103return path ................................141, 146, 149, 153, 155RF power..................................................................... 89RG-59 ........................................................................ 189RG-59/U.....................................................................189RG-6 .......................................................................... 189RJ-21 ..................................................................... 69, 70RJ-45 ..................................................................... 62–70running-config file ............................................... 88, 124

Sscrambler .................................................................. 101secure shell ................................................. 97, 143, 170ServiceGuard Management System ...................127, 146shared secret.....................................................119, 150shipping carton ......................................... 15, 35, 36, 40short circuit ................................................................. 81short data grant interval ............................................ 103shortened last codeword ........................................... 101siaddr field ................................................................150SID ............................................................................ 143signal amplitude........................................................ 141slots ............................................................................ 85SNMP ................................................................148, 160SNMP community ..................................................... 120SNR...................................................................135, 146software upgrade ...................................................... 169spectrum analyzer.............................................127, 128spectrum analyzer mode........................................... 129spectrum monitoring................................................. 146startup-config file ................................................ 88, 124station maintenance.................................. 103, 135, 155Stop bits ...................................................................... 84

TTelnet........................................................................ 170temperature ................................................ 78, 140, 148terminal emulation...................................................... 84TFTP .................................................................140, 150throughput ................................................................156TLV ...........................................................................105TOD .......................................................................... 150

traceroute..................................................................124

Uupstream...........................................59, 62, 90, 91, 152upstream channel width............................................153upstream modulation profile .....................................101username ..............................................................88, 97

Vvideo servers .................................................................4Virtual Private Network .............................................105VPN...........................................................................105VSIF...........................................................................105


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