Carrier Ethernet Service Overview (Metro Ethernet Forum)

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Carrier Ethernet Services Overview

August 2008

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Purpose

• Carrier Ethernet Services Overview – This presentation defines the MEF Ethernet

Services that represent the principal attribute of a Carrier Ethernet Network

– This presentation is intended to give a simple overview as a grounding for all other MEF documents

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Agenda

• What is Carrier Ethernet?• Carrier Ethernet Terminology

– The UNI, NNI, MEN.– Ethernet Virtual Connections (EVCs)

• EVCs and Services • E-Line Services

– Ethernet Private Line– Ethernet Virtual Private Line

• E-LAN Services– Multipoint Services

• E-Tree Services• Service Attributes

– Service Parameters– Bandwidth Profiles– Traffic Management

• Circuit Emulation Services• Carrier Ethernet Architecture for Cable• Carrier Ethernet in Access Networks• MEF Specifications• Service Examples

March 2007

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Carrier Ethernet Defined

Carrier Ethernet for the Business Users:

The MEF has defined Carrier Ethernet as

• A ubiquitous, standardized, carrier-class Service and Network defined by five attributes that distinguish it from familiar LAN based Ethernet

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Carrier Ethernet Defined

• A set of certified network elements that connect to transport Carrier Ethernet services for all users, locally & worldwide

• Carrier Ethernet services are carried over physical Ethernet networks and other legacy transport technologies

Carrier Ethernet for Service Providers:

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What is Carrier Ethernet?

• Question:– “Is it a service, a network, or a technology?”

• Answer for an end-user– It’s a Service defined by 5 attributes

• Answer for a service provider – It’s a set of certified network elements that

connect to transport the services offered to the customer

– It’s a platform for value added services– A standardized service for all users

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Carrier Ethernet Terminology

• UNI Type I– A UNI compliant with MEF 13– Manually Configurable

• UNI Type II– Automatically Configurable via E-LMI – Manageable via OAM

• Network to Network Interface (NNI)– Network to Network Interface between distinct MEN operated

by one or more carriers– An active project of the MEF

• Metro Ethernet Network (MEN)– An Ethernet transport network connecting user end-points

(Expanded to Access and Global networks in addition to the original Metro Network meaning)

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Carrier Ethernet Network

UNIUNI

MEF Carrier Ethernet Terminology

• The User Network Interface (UNI)– The UNI is the physical interface or port that is the

demarcation between the customer and the service provider/Cable Operator/Carrier/MSO

– The UNI is always provided by the Service Provider– The UNI in a Carrier Ethernet Network is a physical

Ethernet Interface at operating speeds 10Mbs, 100Mbps, 1Gbps or 10Gbps

CE: Customer Equipment, UNI: User Network Interface. MEF certified Carrier Ethernet products

CECE

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MEF Carrier Ethernet Terminology

• Ethernet Virtual Connection (EVC)– Service container– Connects two or more subscriber sites (UNI’s)– An association of two or more UNIs – Prevents data transfer between sites that are not

part of the same EVC– Two types of EVCs

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

– Can be bundled or multiplexed on the same UNI– Defined in MEF 10.1 technical specification

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Carrier Ethernet: Two Service Types Using EVCs

• E-Line Service used to create

– Ethernet Private Lines– Virtual Private Lines– Ethernet Internet Access

• E-LAN Service used to create

– Multipoint L2 VPNs– Transparent LAN Service– Foundation for IPTV and

Multicast networks etc.

E-Line Service type

E-LAN Service type

Point-to-Point EVC


UNI: User Network Interface, CE: Customer Equipment

CECE

UNIUNI UNIUNI

CECE

Multipoint-to-Multipoint EVC


CECE

UNIUNI

MEF certified Carrier Ethernet products

CECE

UNIUNI

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EVCs and Services

In a Carrier Ethernet network, data is transported across Point-to-Point and Multipoint-to-Multipoint EVCs according to the attributes and definitions of the E-Line and E-LAN services

Point-to-Point EVC


UNIUNI UNIUNI

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Services Using E-Line Service Type

• Ethernet Private Line (EPL)– Replaces a TDM Private line– Dedicated UNIs for Point-to-Point connections– Single Ethernet Virtual Connection (EVC) per UNI– The most popular Ethernet service due to its simplicity

Point-to-Point EVC


CECE UNIUNI

CECEUNIUNI

CECE

UNIUNI

ISPPOP

UNIUNI

Storage Service Provider

Internet

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UNIUNI

Services Using E-Line Service Type

• Ethernet Virtual Private Line (EVPL)– Replaces Frame Relay or ATM services– Supports Service Multiplexed UNI

(i.e. multiple EVCs per UNI)– Allows single physical connection (UNI) to customer

premise equipment for multiple virtual connections


CECEUNIUNI

CECEUNIUNI

Point-to-Point EVC

CECE

ISPPOP

Internet

Service Multiplexed

Ethernet UNI

CECE

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Services Using E-LAN Service Type

• Ethernet Private LAN and Ethernet Virtual Private LAN Services– Supports dedicated or service-multiplexed UNIs – Supports transparent LAN services and

multipoint Layer 2 VPNs

Service Multiplexed

Ethernet UNI

Point-to-Multipoint EVC


CECEUNIUNI

UNIUNI

UNIUNI

CECE

UNIUNI

CECE

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MEF 6.1 Ethernet Services Definitions Phase 2

MEF 6.1 Enhancements • Defines a new service type (E-Tree) in addition to those

defined in MEF 6• Adds four new services – two each to E-LAN and E-Tree

Service TypePort-Based

(All-to-One Bundling)VLAN-Based

(Service Multiplexed)

E-Line(Point-to-Point EVC)(Point-to-Point EVC)

Ethernet Private Line(EPL)

Ethernet Virtual Private Line(EVPL)

E-LAN (multipoint-to-multipoint (multipoint-to-multipoint

EVC)EVC)

Ethernet Private LAN(EP-LAN)

Ethernet Virtual Private LAN(EVP-LAN)

E-Tree(rooted multipoint EVC)

Ethernet Private Tree(EP-Tree)

Ethernet Virtual Private Tree(EVP-Tree)

No changeNo change ModifiedModified NewNew

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Services Using E-Tree Service Type

• Ethernet Private Tree (EP-Tree) and Ethernet Virtual Private Tree (EVP-Tree) Services– Provides traffic separation between users with traffic

from one “leaf” being allowed to arrive at one of more “Roots” but never being transmitted to other “leaves”

– Targeted at multi-host and where user traffic must be kept invisible to other users

– Anticipated to be an enabler for mobile backhaul and triple-play infrastructure rather than end-user SLAs

Root


CECEUNIUNI

UNIUNI

UNIUNI

CECE

UNIUNI

CECE

Leaf

Leaf

UNIUNI

CECE

Leaf

See examples at the end of presentation. E-Tree is referenced in MEF 10.1 as Rooted-Multipoint EVC.

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Carrier Ethernet Architecture (1)

Dat

a P

lan

e

Co

ntr

ol

Pla

ne

Man

ag

emen

t P

lan

e

Transport Services Layer (e.g., IEEE 802.1, SONET/SDH, MPLS)

Ethernet Services Layer (Ethernet Service PDU)

Application Services Layer (e.g., IP, MPLS, PDH, etc.)

APP Layer

ETH Layer

TRAN Layer

Data moves from UNI to UNI across "the network" with a layered architecture. When traffic moves between ETH domains is does so at the TRAN layer. This allows Carrier Ethernet traffic to be agnostic to the networks that it traverses.

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Ethernet Services Layer Terminology

Carrier Ethernet Architecture (2)

Service Provider 1 Carrier Ethernet Network

CECE

UNIUNI

MEF certified Carrier Ethernet products

Ethernet Services “Eth” Layer

Subscriber Site

ETHUNI-CETH

UNI-CETH

UNI-NETH

UNI-NETH

UNI-NETH

UNI-NETH

E-NNIETH

E-NNIETH

UNI-CETH

UNI-C

UNI: User Network Interface, UNI-C: UNI-customer side, UNI-N network sideNNI: Network to Network Interface, E-NNI: External NNI; I-NNI Internal NNI

CE: Customer Equipment

UNIUNI

CECE

I-NNII-NNI E-NNIE-NNI

Service Provider 2

I-NNII-NNI

ETHE-NNIETH

E-NNI

Subscriber Site

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Service Parameters

• EVC Service Attributes– Details regarding the EVC including– Bandwidth profiles, QoS Assignment and Tagging

options– Latency, Delay Variation (Jitter), Frame-loss

• Bandwidth Profiles– Committed Information Rate– Excess Information Rate– Rate Enforcement - Shaping and Policing– Burst size (window)

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CIR and EIR Bandwidth Profiles

• BW profiles per EVC– CIR – Committed Information Rate

• Frame delivery obligation per SLA

– EIR – Excess Information Rate

• Excess frame delivery allowed – not

subject to SLA if available

– CBS, EBS - size of burst window (ms)

for allowed CIR / EIR rates

Total UNI BW

EVC1

CIR

EIREVC2

CIR

EIR

EVC3

CIR

EIR

2 rate, 3 Color marking Marking typically done at ingress

Green – Forwarded frames – CIR conforming traffic Yellow – Discard Eligible frames – Over CIR , within EIR Red – Discarded frames – Exceeds EIR

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UNI

EVC 1

EVC 2

EVC 3

Ingress Bandwidth Profile Per Ingress UNI

UNI

EVC 1

EVC 2

EVC 3

Ingress Bandwidth Profile Per EVC1



UNI EVC 1

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 4Ingress Bandwidth Profile Per CoS ID 2

EVC 2

Port-based Port/VLAN-based

Port/VLAN/CoS-based

MEF 10.1 Traffic Management Model

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Carrier Ethernet Scope and ReachBringing vastly extended scalability for business and residential users

Wireless Backhaul

Voice Gateway

Voice/VideoTelephony

HD TVTVoD, VoD

Gaming, BusinessBackup, ERP

ResidentialTriple-Play

Broadbandmobile data/video

VideoSource

VideoSource

Small/Medium Business

Internet

FTTx and DSLAM , Cable Modem

E-Line andE-LAN service

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TDM Circuits(e.g. T1/E1 Lines)

Circuit Emulation Services over Carrier Ethernet

• Enables TDM Services to be transported across Carrier Ethernet network, re-creating the TDM circuit at the far end– Runs on a standard Ethernet Line Service (E-Line)

Carrier Ethernet NetworkTDM Circuits

(e.g. T1/E1 Lines)Circuit Emulated

TDM Traffic

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Carrier Ethernet Architecture for Cable Operators

Headend Hub

EQAM

CMTS

Optical Metro Ring Network

VideoServer

D2A

AdInsertion

E-LAN

E-LineBusiness Services over Fiber (GigE)

Voice gateway

Voice/VideoTelephony

Digital TV, VOD,

Interactive TV, Gaming

Managed BusinessApplications

InternetAccess

AnalogTV Feeds

A2D

HubUNIUNI

CECE

E-NNIE-NNI

Another MSO or carrierNetwork

EoDOCSIS(future)

EoT1/DS3

PON

Greenfield Residential & Business Services

EoSONET/SDH

CECEUNIUNI

WDM

UNIUNIHome RunFiber

EoCoaxEoHFC

SwitchedFiber

Business Park

Business Services

Node

E-LineE-LAN

CECE

UNIUNI

CECE

WirelessPlant

ExtensionLeasedT1/DS3

CECEUNIUNI

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Related MEF Services Specifications

Purpose Defines the Ethernet Services (EPL, EVPL, E-Line, ELAN, and E-Tree)

MEF 6.1MEF 6.1

PurposeDefines the service attributes and parameters required to offer the services defined in MEF 6. Updated from Original MEF 10 in October 2006

Audience

Appropriate for equipment vendors, service providers, and business customers, since it provides the fundamentals required to build devices and services that deliver Carrier Ethernet. For Enterprise users it gives the background to Service Level Specifications for Carrier Ethernet Services being offered by their Service Providers and helps to plan Ethernet Services as part of their overall network.

Ethernet Services Attributes Phase 2 MEF 10.1MEF 10.1

Metro Ethernet Services Definitions Phase II

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Example Uses of Services

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Examples for EPL

HQ

Branch

Branch

EPL

EPL

• Simple configuration

• “The port to the Internet it is un-trusted”

• “The port to the branches it is trusted”

• No coordination with MEN SP for HQ to branch subnets

• Fractional bandwidth (Bandwidth Profile) to minimize monthly service charges

Internet

Firewall

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Example Use EVPL

ISPISPCustomer 1Customer 1

Turbo 2000Turbo 2000Internet Access, Inc.Internet Access, Inc.



Service MultiplexingService Multiplexing

VLANVLAN 2000 2000 Blue BlueVLANVLAN 2000 2000 Yellow Yellow

VLANVLAN 2000 2000 Green Green

VLAN 178 VLAN 178 Blue BlueVLAN 179 VLAN 179 Yellow YellowVLAN 180 VLAN 180 Green Green

• Efficient use of ISP router ports

• Easy configuration at ISP customer sites

• This port and VLAN 2000 (or even untagged) to Turbo Internet

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Example Use of EVP-LAN

Deadbeat DetectCredit Check, Inc.

Instant CashLoans, Inc.

Walk In Drive Out Used Cars, Inc.

• Redundant points of access for critical availability higher layer service

• Efficient use of DDC’s router ports

• ICL and WIDO Used Cars cannot see each other’s traffic

Service Multiplexing

A

BD

EVC1

C

EVC2

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Example Use of EP-Tree

A

B

C

D

EVC1

Internet for theSmall Guy, Inc.

Small Guy Travel

Root

Leaves

Diminutive GuyGaming Center

Tiny Guy Coffee

• Efficient use of ISG router port

• One subnet to configure on ISG router

• Simple configuration for the little guys

• Small, Tiny, and Diminutive Guys can’t see each other’s traffic

• Second Root would provide redundant internet access

• Some limits on what routing protocols can be used

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Example Use of EVP-Tree

A

B

C

D

EVC1

Internet for theSmall Guy, Inc.

Small Guy Travel

Roots

Leaves

Diminutive GuyGaming Center

Tiny Guy Coffee

• Efficient use of ISG router port

• Efficient distribution of elevator video

• Small, Tiny, and Diminutive Guys can’t see each other’s traffic, EV Franchises can’t see each other’s traffic

• Second Root would provide redundant internet access

• Some limits on what routing protocols can be used

Elevator Video Franchises

LeavesService Multiplexing

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Carrier Ethernet Service Overview (Metro Ethernet Forum)

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