IP NGN Carrier Ethernet Overview...Mobile CPE DSL/ PON Cable Ethernet E1/ATM Access FR/ATM Corporate Ethernet Point-to-Point Point-to-MP Multipoint Legacy Services ATM Frame Relay

© 2009 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialPresentation_ID 1

IP NGN Carrier Ethernet Overview

Mohammed ElkomySP Systems Engineer, Cisco

© 2009 Cisco Systems, Inc. All rights reserved. Cisco PublicTECOPT-2100_c1 2

Agenda

IP NGN Carrier Ethernet Architecture Overview

Next Generation Carrier Ethernet Technologies

Ethernet Access Terminology and Services

Ethernet Transport over MPLS

Ethernet OAM


IP NGN Carrier Ethernet Architecture


IP NGN Carrier Ethernet Design

Access Aggregation Core

BNG Billing

LocationServer NMSMSE

VoD DPI

AggNode

Edge OSS/BSS

Network Layer

IP NGN

Architectural Framework and

Functionality

Physical Instantiation

Application Layer

Video and Gaming Data Center

Presence-Based

Telephony

Web Services

Mobile Apps

IP Contact Center

Service Layer

Network Layer

Customer Element

Access/ Aggregation

Intelligent Edge

MultiserviceCore

Carrier Ethernet

Cisco Service

Exchange Framework

Framework for User and Application-

Based Control

Self Service

Identity Policy Billing

Ope

ratio

nal

Laye

r

DistNode


Next Generation Carrier Ethernet Technologies


IPNGN Carrier EthernetTechnology Overview

OAM Subsystem

IPoDWDMOptical Network

Aggregation Node

Aggregation NetworkMPLS/IP

Carrier Ethernet Aggregation

BNG

BNG

Access Edge

Aggregation Node

Aggregation Node

Ethernet Node

STB

Corporate

STB

STB

Residential

VoD

Content Network

TV SIP

PON Node

DSLNode

Core

VoD

Content Network

TV SIP

EMS NMSPortal

AAA Service and Performance MgmtDHCP, DNS

Multiservice Core

Core NetworkIP / MPLS Distribution

Node

Distribution Node

Corporate

CorporateBusiness

Business

Business

Residential

Residential RADIU

S (C

oA)

Aggregation Node

Multiple spanning treeResilient Ethernet protocol

Flexible service mappingEthernet virtual connection infrastructureSecurity features

L2 transport over MPLSVPLSCarrier Ethernet StandardisationIP Unicast/Multicast

IPoDWDM integration

Ethernet adaptation to MPLS and IPInterworking VPLS with MST/REPEthernet/MPLS OAM

2G/3G Node


Carrier Ethernet Cooks—Who Does What?

Focus on the User-Perspective: Ethernet Services, UNI, Traffic Engineering, E-LMI…

Building Ethernet-Access (and Beyond) Networks: Provider Bridges 802.1ad; Connectivity Management—OAM: 802.1ag, 802.1ah Backbone Bridges, 802.1ak Multiple Registration Protocol, 802.1aj Media Converters, 802.1aq Shortest Path Bridging, etc.

L2VPN, PWE3 WG—Building the Network Core: VPWS, VPLS

SG15/Q12, SG13/Q3; Architecture of Ethernet Layer Networks, Services etc.—from a Transport Perspective. E2E OAM

Ethernet to Frame-Relay/ATM Service Interworking

DSL/FttX/Broadband-Related Architecture and Transport Aspects (TR-101), BRAS/BNG Requirements, Ethernet Aggregation/TR-59 Evolution, Subscriber Session Handling, IPv6, Connected Home…

http://www.ipmplsforum.org/index.shtml

http://www.broadband-forum.org/index.php


Ethernet AccessMetro Ethernet Forum Services


MEF Concepts and TerminologyEthernet Virtual Connection (EVC)

CE

CE

CEUNI

UNI

UNI

CE

CE

CEUNI

UNI

UNICE

CE

CE UNIUNI

UNI

Point-to-Point Multipoint-to-Multipoint Rooted-Multipoint

Ethernet virtual connectionConceptual visualization of an Ethernet service (business or infrastructure service)An association of two or more UNIsThree types:

Point-to-point EVC (e-line)Multipoint-to-multipoint EVC (e-LAN)Rooted-multipoint EVC (e-tree)


MEF Concepts and TerminologyUNI Attributes

CE

CE

UNI

UNI

Bundling: more than one CE-VLAN on a UNI mapped to an EVC Selective double-tagging/QinQ

All-to-one bundling: all CE-VLANs on a UNI mapped to a single EVC

Double-tagging/QinQ

Service multiplexing: support multiple EVCs over a UNI. EVC selection is based on CE-VLAN value

UNIAll-to-One Bundling

All

CE-VLANs

Service Multiplexing

CE

CE

UNI

UNI

UNI

Bundling

CE-VLAN subset

CE

CE

UNI

UNI

UNI


Ethernet Transport

Carrier Ethernet Standards Ethernet Transport over MPLS


L2 MPLS Transport

Two technologies for L2 transport over MPLS:Ethernet over MPLS (EoMPLS)

Used for L2 point-to-point link over MPLS cloud No MAC learning involved

Virtual Private LAN Services (VPLS)Used for multipoint L2 connections Collection of pseudowires tied together by a Virtual Forwarding Interface (VFI)MAC addresses learned on VFITraffic forwarding based on destination MAC addressesH-VPLS, an extension of VPLS

Can co-exist with L3VPNs (MPLS-VPNs/RFC2547bis)Both L2 and L3 VPNs can leverage traffic engineering with Fast Reroute (TE-FRR)


EoMPLS Overview

MPLS

Pseudowire

Aggregation Node

PAggregation

NodeAccess NodeFTTB CPE

Access NodeFTTB CPE

LDP LDP

Targeted LDP

Attachment CircuitAttachment Circuit

P

Tunnel Label

EthernetPDU

VC Label

Ethernet PDU

EthernetPDU

MPLS in the aggregation network and coreTargeted LDP session between PEs to exchange VC labelTunnel label is used to forward packet from PE to PEVC label is used to identify L2VPN circuitAttachment Circuit (AC) can be port-based or VLAN-based


MPLS TE Fast Re-Route (FRR)

Subsecond recoveryagainst node/link failures

Scalable 1:N protection

Greater protection granularity

Cost-effective alternative to optical protection

Bandwidth protection

IP/MPLS

R2

R1

R8

Primary TE LSP

Backup TE LSP


VPLS (Virtual Private LAN Services)

Aggregation Node

MPLS

Core

VFIVFI

VFIVFI

VFIVFI

Attachment Circuit

Ethernet Port or VLAN

Virtual Forwarding

Instance

Eompls Virtual Circuit (Pseudowire)

Aggregation Node

Aggregation Node

Access Node

Access Node

Attachment Circuit (AC)—connection to aggregation using an Ethernet VLANVirtual Circuit (Pseudowire)—EoMPLS tunnel between PEs using a full meshVirtual Forwarding Instance (VFI)—A virtual L2 bridge instance that connects ACs to VCs (PWs); VFI=VLAN=broadcast domain


VPLS Traffic Forwarding ExampleSite B

Data SRC: A DST: B

Data SRC: A DST: B

B1

B2

Src MAC InterfaceA LAN Port

B VPLS B1

Site A

Data SRC: A DST: BData SRC: B DST: A

Data SRC: A DST: BData SRC: B DST: A Data SRC: A DST: BData SRC: B DST: A

Initial traffic across all pseudowires; MAC address learned

Traffic sent to relevant pseudowires

On N-PE failure, pseudowires goes down, MACs flushed

MAC learning process again


How to Build the Ethernet Multipoint/ Multi-Edge Architecture? VPLS or…

EoMPLS PWIP Edge

Aggregation Node

Bridge

VPLS = LAN emulationSmells like a LAN, but is not a LANH-VPLS is just a scaling option, retains full-mesh notion

PW

EoMPLS Pseudowire (PW) serving as virtual bridge trunk into a 802.1ad Bridge Domain (BD)Idea divorces transport protocols from service instance identifier Combining 802.1ah (PBB) with MPLS pseudowires a future option to scale the amount of service instances


Next-Generation Transport Requirements

Policy Plane (per Subscriber)

IdentityAddress

MgmtSubscriber DatabaseMonitoring

Policy DefinitionBilling Presence Mediation

Single Tier

Hub and Spokeor Ring

Aggregation L3 Service Edge L3 Core

Portal

Business

Residential

AG

Mobile

CPEDSL/PON Cable

Ethernet

E1/ATM

Access

FR/ATM

Corporate

Ethernet

Point-to-PointPoint-to-MPMultipoint

Legacy Services

ATMFrame Relay

TDM

NGN Application

Efficient IP MulticastEfficient VoD Delivery

Call Admission Control

OthersQoS, OAM&P,

TE, and RecoveryFast/Zero-Touch

Provisioning

ServicesCarrier

Ethernet IP/MPLS

Carrier Ethernet

P2P

Pt2Pt Yes Yes

Pt2MPt Yes NoEthernet/ L2VPN/ Transport Services MPt2MPt Yes No

ATM Yes No

F/R Yes NoLegacy Services

TDM Yes No

L3VPN Yes No

Unicast Yes NoIP Services

Multicast Yes No

P2PEthernet

P2P and MultipointEthernet

P2P Transport

Only

+P2MP, MP2MP Biz

Services

NGNTransport+ Broadcast TV, VoD, IP

VPN, ATM/FR/TDM

Cost

Carrier Ethernet IP/MPLS

P2P Carr Eth


pre-FEC FRR Fault Packet Loss (ms)Highest Lowest Average

Yes Optical-Switch 11.50 11.18 11.37Yes Noise-Injection 0.02 0.00 0.00Yes Fibre-Pull 11.05 0.00 3.23Yes PMD-Injection 0.08 0.00 0.02No Optical-Switch 11.47 11.54 11.37No Noise-Injection 7404.00 1193.00 4305.00No Fibre-Pull 28.81 18.52 21.86No PMD-Injection 129.62 122.51 125.90

IP/Optical Integration Enables the Capability:To identify degraded link using optical data (per-FEC BER)Start protection (i.e., by signaling to the IGP) before traffic starts failing, achieving hitless protection in many cases

IP/MPLS Optical Integration—IPoDWDM

Trans-ponder

SR Port on

Router

Optical ImpairmentsCor

rect

ed B

its FEC Limit

Working Path

Switchover Lost Data

ProtectedPath

BER

LOF

WDM

FEC

Standard Protection

WDM Port on

Router

Optical ImpairmentsCor

rect

ed B

its FEC Limit

ProtectionTrigger

Working Path

Protect Path

BER

Near-Hitless Switch

WDM

FEC

Proactive Protection

MPLS FRR, IP FRR, IS-IS Fast Convergence: All Achieve Near Zero Outage for Slow Failures


Drivers for Ethernet OAM

OAM benchmarksSet by TDM and existing WAN technologies

Operational efficiencyReduce OPEX, avoid truck-rolls

Downtime cost

Management complexityLarge span networks

Multiple constituent networks belong to disparate organizations/companies


Ethernet OAMBuilding Blocks

FaultManagementFault

Management

PerformanceManagementPerformance

Management

ConfigurationManagementConfiguration

Management

FaultManagement

FaultManagement


Management


Management


Management

PerformanceManagementPerformanceManagement


Management


Management


Management

ConfigurationManagement

ConfigurationManagement

802.3ah

E-LMI Cisco

IP SLAsService Layer

Network LayerTransport Layer

802.1ag/Y.1731

E-LMI


Ethernet OAM

IEEE 802.1agConnectivity Fault Management (CFM)

Also referred as service OAM

IEEE 802.3ah

Ethernet link OAMAlso referred as 802.3 OAM, link OAM, or Ethernet in the First Mile (EFM) OAM

ITU-T Y.1731OAM functions and mechanisms for Ethernet-based networks

MEF E-LMIEthernet local-management interface

Building Blocks


Cisco Carrier Ethernet OAM

Core Customer

ProviderBridges

ProviderBridges

IP/MPLS

Business

Residential

Business

Residential

UNI UNINNINNINNI

BackboneBridges

BackboneBridges

Customer

EthernetLink OAM

AccessConnectivity

Fault ManagementAccessE-LMI

MPLSOAM

Protocol Positioning

E-LMI—User to Network Interface (UNI)Link OAM—any point-point 802.3 linkCFM—end-to-end UNI to UNIMPLS OAM—within MPLS cloud


Ethernet Virtual Private Line (EVPL) Replaces Frame Relay or ATM servicesSupports service multiplexed UNIs (i.e., multiple EVCs per UNI)Allows single physical connection (UNI) to customerpremise equipment for multiple virtual connections

Ethernet Private LAN (EP-LAN) Supports dedicated UNIsSupports transparent LAN servicesSupports multipoint Layer 2 VPNs

Ethernet Virtual Private LAN (EVP-LAN)Supports service-multiplexed UNIsSupports multipoint Layer 2 VPNs

Ethernet Private Line (EPL)Replaces a TDM private lineDedicated UNIs for point-to-point connectionsSingle Ethernet Virtual Connection (EVC) per UNIThe most popular Ethernet service due to its simplicity

E-LINE Services E-LAN Services

Carrier Ethernet Services


Ethernet Virtual Private Line (EVPL)

VLAN-based service

MEF Ethernet virtual private line

MEF service attributes:Service multiplexing

Optional CE-VLAN ID preservation

Can be supported using DSL, Ethernet and WiMAX access

Sample SP offerings:Branch office VPN

L3 VPN access

Internet access

CEN

MEF—EVPL

UNIUNI

UNI


Ethernet Private Line (EPL)

MEF—EPL

CEN

UNIUNI

UNI

Port-based service802.1Q tunneling UNIControl protocol tunnelingMEF service attributes:

No service multiplexing All-to-one bundlingCE-VLAN ID preservation

High degree of transparencySupported with Ethernet accessSample SP offerings:

Data centerBusiness connectivityNetwork consolidation


MEF—ELAN

CEN

Ethernet Virtual Private LAN (EVPLAN)

Multipoint-to-multipoint (e-LAN)

VLAN-based service

MEF service attributes:Service multiplexing

Optional CE-VLAN ID preservation

Can be supported using DSL, Ethernet and WiMAX access

Sample SP offeringsMP branch office L2VPN

Concurrent IP VPN access

Disaster recovery


MEF—ELAN

CEN

UNIUNI

UNI

Ethernet Private LAN (EPLAN)

Port-based service802.1Q tunneling UNILayer 2 protocol tunnelingMEF service attributes:

No service multiplexing All-to-one bundlingCE-VLAN ID preservation

High degree of transparencyCan be supported only with Ethernet accessSample SP offerings:

Campus LAN extensionData center disaster recovery


Q and A


Thank You!

Documents

IP NGN Carrier Ethernet Overview...Mobile CPE DSL/ PON Cable Ethernet E1/ATM Access FR/ATM Corporate Ethernet Point-to-Point Point-to-MP Multipoint Legacy Services ATM Frame Relay