Metro Ethernet Services Overview2

8/4/2019 Metro Ethernet Services Overview2

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what buyers need to understand what providers need to communicate

Ralph SantitoroCo-chair, MEF Technical Marketing [email protected]

Metro Ethernet Services


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2Metro Ethernet Services Overview

Contents

Ethernet as a Service

Ethernet Service Benefits

MEF Phase I Service Documents

Defining an Ethernet Service

Example E-Line and E-LAN Services

Ethernet SLAs

References


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Ethernet as a Service

Ethernets origins in the Enterprise

Used as a LAN connectivity technology

Just plug it in and start using it

Ethernets new usage as a Service Requires service attributes like other MAN / WAN

services

Ethernet UNI, Ethernet VC, Service Performance, etc.

Same Ethernet technology just used in a new way


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Ethernet Service Benefits

Ease of use

Widely available, well understood technology

Simplifies network operations (OAM&P)

Cost Effectiveness Widespread use of Ethernet interface

Purchase bandwidth only when needed

Flexibility Single UNI can connect to multiple services Internet, VPN, Extranet supplier, Storage Provider

Bandwidth can be added in 1Mbp increments


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Lets look at TDM and other L2 Services

Inflexible Bandwidth Scalability Increasing non-Ethernet service

bandwidth often requires:

New service (step function)

T1T3, FRATM

New hardware

new interface or equipment

New service provisioning

different protocols / technologies

Often resulting in: Oversubscribing to meet growing

bandwidth needs

OC-48

OC-12

OC-3

T3

T1

1.5M 45M 155M 622M 2.4G

TDM hierarchy or L2 Servicedictates bandwidth increments

and technology

Frame Relay

POS

ATM


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6

Metro Ethernet Services Overview

Ethernet Service Benefits over TDM/other L2 Services

Flexible Bandwidth Scalability Increasing Ethernet service

bandwidth:

Requires just bandwidth provisioning

Provision only amount of BW needed

Same protocol for LAN and MAN

Lower OpEx & CapEx with Ethernet

25-40% lower cost than

TDM, Frame Relay, ATM interfaces1

10x lower cost than high speed SONET interfaces1

Easier and less costly to meet growingbandwidth needs

OC-48

OC-12

OC-3

T3

T1

1.5M 45M 155M 622M 2.4G

Ethernet provides flexiblebandwidth increments using

same technology

Frame Relay

POS

ATM

1GbE

10/100MbE

1 Source: Network Strategy Partners, LLC

Ethernet


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7


MEF Phase I Service Documents

Phase I consists of 3 technical specifications

Ethernet Services Model (ESM)

Defines Ethernet service building blocks (service attributes)

Does not define Ethernet services Ethernet Services Definitions (ESD)

Defines how to apply the ESM building blocks to create services

Defines Ethernet Line (E-Line) and Ethernet LAN (E-LAN)service types and instances of them (EPL, EVPL, EIA, etc.)

Ethernet Traffic Management (ETM)

Defines traffic management and service performancerequirements to create CoS-based SLAs


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Relationship between MEF Phase I Service documents

MEF 1.0 - EthernetService Model (ESM)

(Ratified Sept. 2003)

Ethernet ServiceDefinitions(ESD)

Ethernet TrafficManagement (ETM)


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Ethernet Services Model (ESM)

Ratified by MEF Tech. Committee - Sept. 2003

into Technical Specification MEF 1.0

Defines building blocks for creating services

Building blocks consist of Ethernet ServiceAttributes and Parameters defined for:

Ethernet UNI (User Network Interface)

Ethernet Virtual Circuit (EVC)

MEF 1.0 defines the building blocks to create services


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How the MEF defines an Ethernet Service

Ethernet Service Definition Framework A service is defined via

Service Type

Service Attributes

Service Attribute Parameters

Defined inESD

Defined in ESM(MEF 1.0) and

ETM Defined in ESM(MEF 1.0) and

ETM


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Ethernet Service Basic Model Customer Equipment (CE) attaches

to UNI

CE can be router

IEEE 802.1Q bridge (switch)

UNI (User Network Interface) Standard IEEE 802.3 Ethernet PHY and

MAC

10Mbps, 100Mbps, 1Gbps or 10Gbps

Metro Ethernet Network (MEN) May use different transport and service

delivery technologies

SONET/SDH, WDM, RPR, MiM, QiQ, MPLS

CE

CE

CE

UNI

MetroEthernetNetwork(MEN)

UNI


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Ethernet Service Type

Ethernet Service Type Generic Ethernet connectivity service construct

Each Ethernet Service Type has a set of Ethernet Service Attributes

MEF has defined 2 Ethernet Service Types Ethernet Line (E-Line) Service

Provides Point-to-Point connectivity

Ethernet LAN (E-LAN) Service

Provides Multipoint-to-Multipoint (Any-to-Any) connectivity

Service Types are genericconstructs used to create services


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UNIMEN

UNI

Point-to-Point EVC

Ethernet Virtual Connection(EVC)

An EVC is an instance of an association of 2 ormore UNIs

EVCs help visualize the Ethernet connections Like Frame Relay and ATM PVCs

MEF has defined 2 EVC types Point-to-Point Multipoint-to-Multipoint

EVCs help conceptualize the service connectivity

MEN

Multipoint-to-Multipoint EVC


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Ethernet Service Attributes

Service Attributes define the capabilities of the Ethernet Service Type

Service Attributes defined for UNI and EVC:

Physical Interface Bandwidth Profiles

Service Performance

Service Frame Delivery

Service Multiplexing Etc.

Service Attributes define the service characteristics


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UNI and EVC Service

Attribute Details

Service Attributes defined inMEF 1.0 Technical Specification


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EVC Service AttributesService Attribute Service Attribute Parameters

EVC Type Point-to-Point or Multipoint-to-Multipoint

UNI ListA list of UNIs (identified via the UNI Identifier service attribute) used withthe EVC

CE-VLAN ID

Preservation

Yes or No. Specifies whether customer VLAN ID is preserved or not.

CE-VLAN CoSPreservation

Yes or No. Specifies whether customer VLAN CoS (802.1p) is preservedor not.

Unicast ServiceFrame Delivery

Specifies whether unicast frames are Discarded, DeliveredUnconditionally or Delivered Conditionally

Multicast Service

Frame Delivery

Specifies whether multicast frames are Discarded, Delivered

Unconditionally or Delivered Conditionally

Broadcast ServiceFrame Delivery

Specifies whether broadcast frames are Discarded, DeliveredUnconditionally or Delivered Conditionally

Layer 2 ControlProtocol Processing

Discard or Tunnel per protocol

Service Performance Specifies the Frame Delay, Frame Jitter and Frame Loss per EVC orframes within an EVC identified via their CE-VLAN CoS (802.1p) value

UNI S i A ib


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UNI Service AttributesService Attribute Service Attribute Parameters

UNI Identifier A string used to identity of a UNI, e.g., NYCBldg12Rm102Slot22Port3

Physical Medium Standard Ethernet PHY

Speed 10 Mbps, 100 Mbps, 1 Gbps or 10 Gbps

Mode Full Duplex or Auto negotiation

MAC Layer IEEE 802.3-2002

Service Multiplexing Yes or No. Defines whether multiple services can be on the UNI

UNI EVC ID A string used identify an EVC, e.g., NYCBldg1Rm102Slot22Port3EVC3

CE-VLAN ID / EVC Map Mapping table of customer VLAN IDs to EVC

Max. Number of EVCs The maximum number of EVCs allowed per UNI

BundlingNo or Yes. Specifies that one or more customer VLAN IDs are mappedto an EVC at the UNI

All to One Bundling No or Yes (all customer VLAN IDs are mapped to an EVC at the UNI).

Ingress Bandwidth Profile PerIngress UNI

None or . This Bandwidth profile applies to allframes across the UNI.

Ingress Bandwidth Profile PerEVC

None or . This Bandwidth profile applies to allframes over particular EVC.

Ingress Bandwidth Profile PerCoS ID

None or . This Bandwidth profile applies to allframes marked with a particular CoS ID over an EVC.

Layer 2 Control ProtocolProcessing

Discard, Peer or Pass to EVC per protocol


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E-Line and E-LAN Service Types

E-Line Service used tocreate

Private Line Services

Ethernet Internet Access

Point-to-Point VPNs

E-LAN Service used tocreate

Multipoint VPNs Transparent LAN Service

CE

CE

Point-to-PointEVC

MENUNI

UNI

E-Line Service type

CE

CE

CE

MEN

CE

Multipoint-to-MultipointEVC

UNI

UNI

UNI

UNI

E-LAN Service type

Service Types defined inMEF ESD Spec.


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Example Service using E-Line Service Type

Ethernet Virtual Private Line Supports Service Multiplexed UNI Point-to-Point VPN for site interconnectivity

CECE

MEN

EthernetUNI

EthernetUNI

ServiceMultiplexed

EthernetUNI

Point-to-Point

EVCs

CE FR CPE

FRCPE

MEN

FRUNI

FRUNI

FRUNI

Point-to-PointFR PVCs

Ethernet Virtual Private Lineusing E-Line Service type

Frame Relay Analogyto E-Line Service

FR CPE


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Example Service using E-Line Service Type

Ethernet Private Line

Dedicated UNIs for Point-to-Point connections

MEN

EthernetUNI

EthernetUNI

EthernetUNI

Point-to-Point EVCs

(dedicated BW)

CE

Ethernet Private Lineusing E-Line Service type

Private Line Analogy toE-Line Service

Internet

ISPPOP

Storage SP

EthernetUNI

MEN

OC-3

OC-3

DS1

Dedicated TDM

circuits

CE

Internet

ISPPOP

Storage SP

DS3

CE

CE

CE

CE


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Example Service using E-LAN Service Type

Transparent LAN Service

(TLS) provides

Intra-company Connectivity

Full transparency of control

protocols (BPDUs)

New VLANs added

without coordination with

provider

Multipoint-to-

Multipoint EVCUNI 1

UNI3

UNI 4

UNI2

MENVLANs

Engineering

VLANsSales

Customer ServiceEngineering

VLANsSales

VLANs

SalesCustomer Service

TLS makes the MENlook like a LAN

Transparent LAN Service


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Ethernet SLAs

Many Enterprise customers will not useMetro Ethernet services unless: There are SLAs with performance assurances

There is availability of service to all critical locations

Such enterprises will build private networks

Critical SLA Service Attributes Bandwidth Profile

Service Performance

Enterprise customers require CoS-based SLAswith service performance assurances


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Bandwidth Profiles

MEF has defined three bandwidth profiles

Ingress Bandwidth Profile Per Ingress UNI

Ingress Bandwidth Profile Per EVC

Ingress Bandwidth Profile Per CoS ID

4 parameters

CIR/CBS determines frame delivery per service level objectives

EIR/EBS determines amount of excess frame delivery allowed

Bandwidth Profiles defined in MEF ETM Spec.


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Three Types of Bandwidth Profiles

UNI

EVC1

EVC2

EVC3

Ingress BandwidthProfile Per Ingress UNI

UNI

EVC1

EVC2

EVC3

Ingress BandwidthProfile Per EVC1Ingress BandwidthProfile Per EVC2

Ingress BandwidthProfile Per EVC3

UNI EVC1

CE-VLAN CoS 6 Ingress Bandwidth Profile Per CoS ID 6

CE-VLAN CoS 4

CE-VLAN CoS 2

Ingress Bandwidth Profile Per CoS ID 4

Ingress Bandwidth Profile Per CoS ID 2

EVC2


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Service Performance (QoS)

Service Performance Parameters Availability Frame Delay Frame Jitter

Frame Loss Service performance level to delivery

determined via: Per CoS ID, e.g., 802.1p user priority per EVC

Per UNI (port), i.e., 1 CoS for all EVCs at UNI

Service Performance defined in MEF ETM Spec.


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Example CoS-based Metro Ethernet SLA

E-Line Service

4 Classes of Service

CoS determined via 802.1p CoS ID

Common type of SLA used withCoS-based IP VPNs

ServiceClass Service Characteristics CoS ID

Bandwidth Profileper EVC per CoS ID

ServicePerformance

Premium Real-time IP telephony or IPvideo applications

6, 7CIR > 0PIR = 0

Delay < 5msJitter < 1ms

Loss < 0.01%

SilverBursty mission critical dataapplications requiring lowloss and delay (e.g., Storage)

4, 5 CIR > 0PIR UNI Speed

Delay < 5msJitter = N/S

Loss < 0.01%

BronzeBursty data applicationsrequiring bandwidthassurances

3, 4CIR > 0PIR UNI Speed

Delay < 15msJitter = N/SLoss < 0.1%

Standard Best effort service 0, 1, 2CIR=0

PIR=UNI speed

Delay < 30msJitter = N/SLoss < 0.5%


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Summary

Ethernet Services Same Ethernet just used in new way

E-Line and E-LAN Service types create

broad range of point-to-point and multipoint services Ethernet Services Framework

Defines service attributes that define the servicecharacteristics

Ethernet Services need CoS-based SLAs to increase Enterprise usage for mission critical apps


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References

Metro Ethernet Services A Technical Overview http://www.metroethernetforum.org/metro-ethernet-services.pdf

MEF 1.0 Ethernet Service Model, Phase 1 http://www.metroethernetforum.org/PDFs/Standards/MEF-1.0.doc

Metro Ethernet Services for Enterprises http://www.metroethernetforum.org/businesscase_wp_092702f.pdf

Business Case for Enterprise Metro Ethernet http://www.metroethernetforum.org/presentations/Supercomm2003-Metro-

Ethernet-Business-Case21.ppt

Metro Ethernet Networks - A Technical Overview http://www.metroethernetforum.org/PDFs/WhitePapers/meftechoverviewwhi

tepaper102903.pdf