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Carrier Ethernet: User to Network Interface (UNI)

Network-to-Network Interfaces (E-NNI)and End-to-End OAM

Arie Goldberg,CEO, Omnitron System Technology, Inc.Board Member, Metro Ethernet Forum

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Agenda

• Carrier Ethernet Services and Challenges– Carrier Ethernet (CE) MEF defined Services– CE Service Provider challenges

• Ethernet Services Network Basics– Demarcation Points - Definition of UNI and E-NNI– Anatomy of Ethernet Service

• Link and Service OAM– OAM Hierarchies, Components and Protocols – Link and Service OAMs

• Wholesale Logistics– Global Services Directory– Wholesale Access Template

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Carrier Ethernet Services and Challenges

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Carrier Ethernet’s “Evolution”

• Basic Ethernet Access Services definition• From Metro to Regional Services• From Regional to National Services• From National to International / Global Services• From Intra-Provider (In-franchise/IF) to Inter-

Provider (out-of-franchise/OOF) Services

1999, Europe:First Metro Ethernet

LAN

WAN OOF WAN

MAN

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Demand Drivers – Services and Bandwidth

On-line Government Education Remote learning Healthcare date & Tele-medicine

Commerce, On-line Business, Tele-workers, On-lineFinancial Services, On-line

NEWtools!Apps!

BackhaulApps

$$$$

$$$$

$$

$$$$

$$

VoIPVoDIPTV E-Line

E-LAN)

Low CAPEXLow OPEX

Low Cost to Subscribers

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The MEF 5-Attributes of Carrier Ethernet

• Carrier Ethernet is a ubiquitous, standardized, carrier-class SERVICE defined by five attributes that distinguish Carrier Ethernet from familiar LAN based Ethernet

• It brings the compelling business benefit of the Ethernet cost model to achieve significant savings

Carrier Ethernet

• Scalability

• Standardized Services

• Service Management

• Quality of Service

• Reliability

Carrier Ethernet Attributes

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MEF defined Basic CE Services

E-LINEEPL: Private LineEVPL: Virtual Private Line

E-LANEP-LAN: Private LANEVP-LAN: Virtual Private

LAN

Point to PointSite2Site L2 VPNs

E-TREEEP-Tree: Private TreeEVP-Tree: Virtual Private

Tree

Point to Multi-PointBroadcasting ServicesTriple Play backhaulMobile backhaul

Multi-Point to Multi-PointMulti-Site L2 VPNsTransparent LANs

Point-to-Point EVC

CPEUNI UNI

CPE

CPE

UNI CPEUNI

Multipoint EVC

Rooted Multipoint EVC

CPE UNI

CPEUNI

CPEUNI

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Global Services crossing carrier boundaries

Carrier AService Provider

Carrier CAccess Provider

Carrier BTransport Provider

E-NNI

Multi-point to Multi-point EVC

UNI

UNI

UNI UNI

UNI

E-NNI

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Some of the Challenges of CE Service Providers

• Turn-up services quickly and efficiently – be competitive, get revenues ASAP

• On/Off-Net services – meet global customer needs - buy and sell / wholesale with other providers - generate revenue on and off-net

• Reliability/Up-time (99.999%) - enable high value services with SLAs for higher rate revenues

• Quality – build customer satisfaction – increase customer retention – keep revenues coming

• Efficient operation - keep OpEx costs down – be competitive and profitable

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Carrier Ethernet Network Basics

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Carrier Ethernet Demarcation Points

• UNI - User-to-Network Interface– Demarcation point between

• Ethernet Service Provider/Access Network Provider and Subscriber– Ethernet Service / Ethernet Virtual Connection (EVC) starting / ending point

• E-NNI - External Network-to-Network Interface– Demarcation point between:

• Ethernet Service Provider and Access Network Provider• Ethernet Access Provider and Transport Network Provider

• EVC - Ethernet Virtual Connection– Ethernet service connecting between 2 or more UNIs

E-NNI E-NNIAccess Network Access Network

ProviderProvider

E-NNI Transport Transport

Network ProviderNetwork ProviderEthernet Service Ethernet Service

ProviderProvider

UNI UNI

EVCEVCSubscriber Subscriber

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Carrier Ethernet Service

E-NNI UNI2

• Access Network Provider – Provides CEVC1 connection between Subscriber UNI1 (RUNI) and

VUNI1 at E-NNI1 with Transport Network Provider

• Transport Network Provider– Provides CEVC2 connection between E-NNI1 (VUNI2) and E-NNI2

(VUNI3) with Ethernet Service Provider

• Ethernet Service Provider– Provides connection to E-NNI2 with Transport Network Provider

– Provides End-to-End Ethernet Service to Subscriber• Provides EVC between UNI1 and UNI2

UNI1 Transport Transport

Network ProviderNetwork Provider

Ethernet Service Ethernet Service ProviderProvider

Transit TunnelTransit TunnelTerminating TunnelTerminating Tunnel

EVC

Access Network Access Network

ProviderProvider

RUNI VUNI1 VUNI2 and VUNI3

E-NNI1 E-NNI2

SubscriberCEVC1 CEVC2Subscriber

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Network Interface Device (NID)

• A device that provides the point of demarcation between an operator ans a subscriber • UNI-N functions are partitioned between the NID and the Network Edge device

• Provides the physical interface to the subscriber (fiber, copper)

• Owned by the Operator / Service Provider• managed by Operator / Service Provider• Provides fault and performance management for E2E services• Complex device

Service Provider Network Operator Network

E-NNI UNIUNI

CE

CE

NID NID

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Global Services crossing carrier boundaries

Carrier AService Provider

Carrier CAccess Provider

Carrier BTransport Provider

E-NNI

Multi-point to Multi-point EVC

UNI

UNI

UNI UNI

UNI

E-NNI

Challenge: How to install quickly, run reliably, operate efficiently and deliver Challenge: How to install quickly, run reliably, operate efficiently and deliver SLA ============================================= $$ / €€ /££SLA ============================================= $$ / €€ /££

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Link and Service OAMs

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OAM Layer Components

• Each layer supports OAM capabilities independently• OAMs interoperate • Component responsibilities are complementary

E2E Performance Monitoring

E2E Fault Monitoring

P2P Link FaultManagement

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802.3ah 802.3ah 802.3ah 802.3ah 802.3ah 802.3ah 802.3ah 802.3ah

UNI UNI

E-NNI

802.3ah

Link Fault Management OAM

• Link OAM - IEEE 802.3ah – Per link (point-to-point):– Link monitoring -- Remote loopback– Remote failure indication -- Loopback Control– Good for single links, but does not monitor across EVC

Ethernet Link Fault Management performed by Ethernet Link Fault Management performed by Carrier Ethernet network elements and NIDsCarrier Ethernet network elements and NIDs

NIDNID

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E2E Service OAM – Maintenance Associations

• Maintenance Association (MA) – Boundaries of an Administrator’s scope of monitoring part of the network

• Maintenance Domain (MD) – A level of monitoring within the hierarchy• Maintenance End Points (MEP) – End Points of the MA or MD• Maintenance Intermediate Points (MIP) – Intermediate Points within MA or MD

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E2E Service OAM - Hierarchical Domains

• A flat network is difficult to manage and define accountabilities• Hierarchical Maintenance Domains defines OAM Flows & OAM responsibilities

Network OAM

Service OAM

Customer Domain

Provider Domain

Operator Domain

Operator Domain

Customer CustomerService Provider

UNI UNIE-NNI

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Ethernet Service Connectivity Fault Management

• IEEE 802.1ag for EVC Connectivity Fault Management– For Protection/Restoration

• Connectivity Check Messages (CCMs) for heartbeats– For diagnostic purposes

• Connectivity Check (Layer 2 Ping), Link Trace, Loopbacks

• CCMs initiated between:– Management Endpoints (MEPs / UNIs)– Management Intermediate Points (MIPs / NNIs)– Management Endpoints and Intermediate Points (UNI-NNI)

Connectivity Fault Management provided by Connectivity Fault Management provided by Carrier Ethernet network elements and NIDs Carrier Ethernet network elements and NIDs

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Access Access NetworkNetwork

Metro Metro AggregationAggregation

NetworkNetwork Access Access NetworkNetwork

IP/MPLS CoreIP/MPLS CoreNetworkNetwork Metro Metro

Aggregation Aggregation NetworkNetwork

Maintenance Association (MA)

MEP#1 MEP #2

MIPMIP

Ethernet Service Continuity Check

MEP #1No CCMs received from MEP #2 within 30ms (3 x 10ms) MEP #2

Report on CC fault if no CCMs are received from MEP #1 for 30ms

MEP #1Send CCMs with RDI flag set

MEP #2Remote alarm detected by received RDI Report alarm to management system

MEP #2Initiate protection switchover

MEP #1CCMs sent every 10ms on working/protect paths Check for CCMs received from MEP #2 on working/protect paths

MIP MIPMIPMIP

UNIUNI

MEP #2CCMs sent every 10ms Check for CCMs received from MEP #1

MEP #1Report CC fault to management system

Ethernet continuity check is analogous to IP’s Ping but does much Ethernet continuity check is analogous to IP’s Ping but does much more more

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Ethernet Link Trace

Access Access NetworkNetwork

Metro Metro AggregationAggregation

NetworkNetworkAccess Access NetworkNetwork

IP/MPLS CoreIP/MPLS CoreNetworkNetwork Metro

Aggregation Network

MEP MEPMIPMIP MIPMIP

Link trace Reply

UNIUNI

Ethernet Link Trace is analogous to IP’s TracerouteEthernet Link Trace is analogous to IP’s Traceroute

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Service Performance Management

• Key Metrics1. Frame/Packet Delay – Latency (e.g. UNI/UNI 30ms@99.9%@15min)2. Frame/Packet Delay Variation – Jitter (e.g. 10ms@99.9%@15min)3. Frame/Packet Loss Ratio (e.g. CIR FL=1%@15min)4. Service Availability (e.g. 99.99%@30days)

• ITU-T has defined measurement framework/metrics for items 1-3– IP packet-based measurements– ITU-T Y.1731 defines how to use 802.1ag to measure performance

• MEF has defined measurement framework for items 1-4– Ethernet Frame-based measurements– MEF 10.1 defines formulae for metrics calculation

The combination of IEEE 802.1ag, ITU-T Y.1731 The combination of IEEE 802.1ag, ITU-T Y.1731 and MEF 10.1 define Ethernet service performanceand MEF 10.1 define Ethernet service performance

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Interfaces and Ethernet Virtual Circuits

Point-to-Point EVC

Carrier A

E-NNIUNI

Multi-point to Multi-point EVC

UNIUNI

Point-to-Point EVC

UNI

UNI

UNI

Link OAM802.3ah

E2E Service OAM:Fault-802.1agPerform-Y.1731

Carrier B

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Summary

• New Protocol Solutions– Point-to-Point Link OAM (802.3ah)– End-to-End Service Connectivity Fault OAM (802.1ag)– End-to-End Service Performance Monitoring OAM (Y.1731)

• Enable quick turn-up – Acct acquisition/revenue • Increase reliability/up-time – Acct retention/revenue• Enables SLA commitments – Keep revenue• Enable efficient service operation / maintenance (man/

machine/time/energy) – reduce OPEX

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Wholesale Logistics

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Global Services Directory Summary• Business Users

– Find Carrier Ethernet services anywhere in the world.

• Service Providers– Find a partner to build a global Carrier Ethernet service.

• Featuring– Free access to interactive map driven system– Latest info on available services globally, locally– http://www.metroethernetforum.org/gsd

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Global Services Directory Summary• Business Users

– Find Carrier Ethernet services anywhere in the world.

• Service Providers– Find a partner to build a global Carrier Ethernet service.

• Featuring– Free access to interactive map driven system– Latest info on available services globally, locally– http://www.metroethernetforum.org/gsd

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Global Services Directory Project Review

• MEF worked with Heavy Reading to develop up-to-date database of Ethernet Service Providers worldwide– Identifies Carrier Ethernet services by city, country,

and service application– Four phase project to:

1. Cover MEF Service Providers with basic service and location information

2. Add more service providers and allow real time updates via Service Provider back-end

3. Provide in-depth service information, 4. Non-MEF Service Providers (TBD)

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Service Provider ParticipantsService Provider and Cable MSO Members

• Sprint• Suddenlink• Swisscom• Symphony Communication• TATA Communications• Telecom Italia• Telekom Malaysia• Teliasonera AB• Telus• Time Warner Cable• Time Warner Telecom• T-Systems• Uecomm• Verizon Business• XO Communications

• KDDI R&D Laboratories• KPN Telecom• Level 3 Communications• ntl: Telewest• NTT Advanced Technology • Optimum Lightpath• Orange Business Services• PCCW• PT Inovação• PT Prime• Qwest Communications• RCN Business Solutions• Reliance Communications• Shanghai Information Network• Singapore Telecom

• AboveNet• Alpheus Communications • AT&T• Bell Canada• Bright House Networks• British Telecom• Cable & Wireless• Charter Communications• China Telecom• Cincinnati Bell• Colt• Comcast• Cox Business• Demand Broadband • Embarq• IPC

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Wholesale Access Interconnection Group

Charter:

Define Standard template and procedure for ordering wholesale Ethernet services between service providers

Objectives:

To enable efficient communication of network capabilities between Service Providers and prospective wholesale partners

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WAIG Template

1. Physical Customer Interfaces● For different services (UNI and NNI) provide physical

interface options (fiber, copper, rates etc.)2. Path Diversity and Protection

● For topology and protocol options (xSTP etc.) 3. Ethernet Frames

● Frame type and size options● Service multiplexing (EVCs etc.) options

4. Performance and Class of Service (CoS) Requirements● CoS options● Performance per CoS options

5. Service Technology Questions● Service / BW Profile options● Frame tagging options● Miscellaneous service (no other place) questions

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1. Network Management● Maintenance Points for Fault, Performance OAM options● OAM Protocol options● Administrative options● Wholesale partner administrative and logistical options

2. Performance and SLA Reporting Capability● On and Off-line performance reporting options

3. Security● Threat detection and defense options

4. Connection Admission Control (CAC) Rules● CoS traffic handling

5. EVC and NNI Speeds● Throughput information

WAIG Template (cont.)

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WAIG Status

• Draft is being posted for MEF membership review• “Trial run” Access Providers to fill-out the draft

template – expect comments• Implement comments• Initial publication – Q4 (Oct. 08) MEF meeting (Malta)

• Early adaptors can start using Template now

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Carrier Ethernet’s “Evolution”

2008, Metro Ethernet We are here

LAN

WAN OOF WAN

MAN

Finish E-NNIFinish NIDRefine GS Directory – add SPsRelease WAIG Template

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Thank You

Presentations are availableat

www.metroethernetforum.org