Global Interconnect ENNI UNI OAM 2010 Jan 06

8/3/2019 Global Interconnect ENNI UNI OAM 2010 Jan 06

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Agenda

Elements of a Global Network UNI Type II

ENNI Class of Service Alignment

OAM Enables Global Interconnect End-to-End OAM Architecture

Service OAM Fault Management

Service OAM Performance Management


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Ubiquitous Footprint Drives Interconnect

Expanding ServiceAreas andAcquiring New Customers

National and Global Service Providers need Local Service Providers(Operators) for Local Access

Local Operators need new revenues from wholesaling to Global

Service Providers Multi-operator networks are more complex

Challenge: maintain service consistency across the network

Challenge: end-to-end fault detection and performance monitoring(a.k.a. OAM)

CarrierA

Carrier B


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Carrier Ethernet Demarcation Points

UNI - User-to-Network Interface Demarcation point between Service Provider and

Subscriber

Ethernet Service starting point and ending point

ENNI - External Network-to-Network Interface Demarcation point between operators

EVC - Ethernet Virtual Connection

Ethernet service connecting two or more UNIs

Subscriber Subscriber

Access NetworkAccess Network

ProviderProvider

TransportTransport

NetworkNetwork

ProviderProvider

Ethernet ServiceEthernet Service

ProviderProvider

EVCEVC

ENNI ENNI

UNI

UNI


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User to Network Interface (UNI)

Defines an Ethernet service

demarcation point between customer(subscriber) and service provider

Uses a physical Ethernet Interfaceatoperating speeds 10Mbs, 100Mbps,

1Gbps or10Gbps

Defines service personality serviceattributes, traffic classification,

bandwidth profiles, tagging, etc.

Service Providerresponsibility

Carrier Ethernet

Network

CE

CE

Customer

responsibilityUNI

UNI

NID

NID


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Mandatory Features

Backward comp. toUNI Type 1

Service OAM

Enhanced UNI

attributes L2CP Handling

Optional Features

Link OAM

Protection

E-LMI

UNI Type 2.1

MEF UNI Attributes

UNI type1 (MEF 13) Defines service attributes

Traffic classification & bandwidthprofile(s)

UNI type2 (MEF 20)

Mandatory Features

Backward comp. toUNI Type 1

Service OAM

Enhanced UNI

attributes L2CP Handling

Link OAM

Protection

E-LMI

UNI Type 2.2

ForGlobal Interconnect, support

forend-to-end OAM is mandatory

Provides fault detection andperformance monitoring forsubscriber, operator and serviceprovider


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Proprietary implementations

Limited in features, proprietaryand/or ad-hoc

Require extensive coordination

between operators to match theirservice, operation and interfacecapabilities

Very long turn-up time

OperatorA

Operator C Operator D

Proprietaryinterconnect


Operator B



OperatorA

Operator C Operator D

Operator B

ENNIENNI

ENNI

ENNI

MEF Standardized Interconnect

Provide wide range of well definedstandardized services to enterprisecustomers

Standardized interconnects (ENNI)streamline operators interconnectoperations; reduces time-to-market andtime-to-revenue

Easily scalable to enable alignmentbetween investment and revenue

External Network-to-Network Interface (ENNI)

Proprietary Implementation vs. Standardized Ethernet Interconnects


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Physical Interface

ServiceAttributes

L2CP Handling

Service Mapping

ServiceTunneling

OAM Class of Service

Protection

Requirements

MEF ENNI Attributes

ENNI specification is infinal stages of approvaland ratification by MEF(Planned 2010H1)

UNIUNIENNIENNIUNIUNI

Link OAM

IEEE 802.3ah

Service OAM

IEEE 802.1ag(for fault detection)

ITU-T Y.1731

(for performance monitoring)

OAM

CoS

CoSAlignment

Reference

Point

Ethernet Virtual Connection

Operator 1network

Operator 2network

Critical Area !


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What is Class of Service ?

A specific performancelevel fora particular type ofservice traffic

For example: Video, Voice = high

Data storage = medium

File transfer = low

Servicenames and types vary Example: Silver, Gold, Platinum

Example: Economy, Premium, PremiumPlus


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Class of ServiceAlignment [MEF 23]

Solving the problem ofClass of Service spanningtwo or more ServiceProviders requires:

Common Class ofService lexiconbetween the serviceproviders on eitherside of thestandardized Ethernetinterconnect

Alignment of therespective Classes of

Service at the ENNI


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Scope & Applicability

UNI Carrier Ethernet CoS IA

Application Point (recommended

PCP/DSCP values, mandatory

Performance Objectives)

ENNI Carrier Ethernet CoS IA

Application Point (mandatory PCP

Values if802.1adand mandatory

Performance Objectives)CE CE

Multipoint EVC

Multipoint EVC

Point-Point EVC

MEN

MEN

MEN 2MEN 1

UNIUNI

CECE

CE CE

UNI UNI

UNI UNI

UNI UNI

Point-Point EVC

MEN 2MEN 1

CE CE

UNIUNI ENNI

The scopeandapplicability of the Class of Service ImplementationAgreement

(MEF 23) to both UNI and ENNI, to both Multipoint and Point-Point and to both

singleand multipleMENs is represented here:


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MEF 23 ina Nutshell

Carrier Ethernet CoS ImplementationAgreement Phase1

Specifies a 3 CoS Modelandallows for subsets andextensions

CoS IA PCP or DSCP values recommended for UNI

CoS IA S-tag PCP values mandatory for ENNI

PCP/DSCP mandatory values are subset of the total value

Guidance on Bandwidth Profile constraints Includes consideration for frame disposition (i.e., Color)

Performance Objectives for FD, IFDV/FDV and FLR positionedasplaceholders (define inMEF Phase2)

Quantification in future phase (will likely add MFD and FDR)

May vary for Point to Point vs Multipoint EVC types Positions for future certification


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Global Interconnect: ENNI and OAM

AgendaElements of a Global Network

UNI Type II

ENNI

Class of Service Alignment

OAM Enables Global Interconnect

End-to-End OAM Architecture

Service OAM Fault Management

Service OAM PerformanceManagement


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What Makes an EthernetService Provider Attractivefor Enterprise Customers?

Driving Demand for Service OAM: Reliability

Reliability is Essential to Enterprise Customers

2008 Report from

Heaving Reading:


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Driving Demand for Service OAM: SLAs

SLAs are an essential element of Carrier Ethernet

Frame Relay, Private Line, ATM support SLAs

Subscribers want SLAs and proof of compliance Management and reporting are a key element of the solution

Global Interconnect present challenges for SLAs Need tools to determine performance and quickly isolate fault

locations across multiple operators

What is holding service providers back from

deploying Ethernet moreaggressively?

16% Better alternative solutions

66% Performance monitoring/SLAs inadequate

18% Price


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Driving Demand for Service OAM: OPEX

Reducing Operating Costs is essential to Service Providers

The cost of truck rolls range from $200 to $400 per event

Service OAM provides the maintenance and troubleshooting toolsequivalent to TDM services

Service OAM enables the combination of

Low CAPEX of Ethernet equipment

Low OPEX equivalent to TDM equipment.

LegacyServices

CarrierEthernet

OPEX

CAPEX

Best EffortEthernet


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Ethernet OAM Jurisdictions

Operator1Customer

SiteOperator2

Customer

Site

ENNI UNIUNI

Service OAM

Link OAM IEEE 802.3ah Link OAM

Link OAM

IEEE 802.1ag End-to-End Connectivity Fault Management

ITU-T Y.1731 End-to-End Performance Monitoring

NID NID

MEF

NID/U

NI

MEF

NID/U

NI


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Link OAM

IEEE802.3ah - Ethernet in the First Mile (EFM)

First Ethernet OAM standard completed (2004)

Supports: Remote loopback

Remote failure indication (dying gasp, link faultand critical event) Link monitoring Loopback Control Discovery

Focused on point to point Ethernet link OAM Does not propagate beyond a single link or hop Maintenance OAM, not service


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Link OAM

Operator1Customer

PremisesOperator2 Customer

Premises

ENNIUNIUNI

802.3ah 802.3ah 802.3ah 802.3ah 802.3ah 802.3ah 802.3ah802.3ah

IEEE 802.3ah Per physical network link (point-to-point): Good for single links, but does not monitor across EVC

Used for troubleshooting network links

802.3ah


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End-to-End Service OAM

What is Service OAM?

Enables fault detection and performance monitoring of theEthernet Service (EVC) from End-to-End

Uses synthetic traffic

Supports multiple layers of OAM and maintenance regions

Supports multiple networks and operators

Includes:

IEEE 802.1ag provides Connectivity Fault Management

ITU-T Y.1731 provides Performance Monitoring


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Service OAM - Domains

A flat network is difficult to manage and define accountabilities

Hierarchical Maintenance Domains define OAM Flows and OAMresponsibilities Maintenance Domain (MD) defines the boundary of responsibility of each

stakeholder as a specific level within the network Maintenance Association (MA) defines the path of the service within each

MD level

Operator1Customer


Premises

ENNIUNIUNI

OperatorMAOperatorMA

CustomerMA

ProviderMA


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Maintenance End Points (MEP) End Points that define the

boundaries of the MA Maintenance Intermediate Points (MIP) Intermediate Points

within MA

Service OAM Framework - Detail

Operator1Customer


Premises

ENNIUNIUNI

ProviderMA


CustomerMA


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802.1ag Connectivity Fault Management

802.1ag CFM Defines the Framework for Service OAM

Provides mechanisms to detect, verify, isolate and reportend-to-end Ethernet connectivity faults Connectivity Check Message fault detection during operation Loopback test Linktrace fault isolation

Scalable to provide connectivity checking and fault detectionacross multiple networks and multiple domains Partitions the network into Domains to define responsibilities

of different stakeholders.

Supports up to 8 Maintenance Domains

Connectivity Fault Management provided byConnectivity Fault Management provided byCarrier Ethernet network elements and NIDsCarrier Ethernet network elements and NIDs


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Service OAM - Continuity Check

Continuity Check Message (CCM) OAMPDUs provideperiodic monitoring function exchanged between MEPs

Continuous, non-intrusive monitoring proactively tests circuit

Operator1Customer


Premises

ENNIUNIUNI

ProviderMA


CustomerMA

MEP 1 MEP 2

CCMCCM


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Service OAM Link Trace

Link Trace Message (LTM) and Link Trace Response (LTR) An initiated command to trace intermediate points (MIP) from

one end point (MEP) to another end point (MEP)

Finds faults in defined MAs along an Ethernet Service

Operator1Customer


Premises

ENNIUNIUNI

ProviderMA


CustomerMA

LTM

LTR

MEP 1 MEP 2


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ITU-T Y.1731 PerformanceMonitoring

ITU-T Y.17

31 Mechanisms that provide fault and performance

monitoring for point-to-point Ethernet services

Builds on 802.1ag functionality and adds:

Introduces performance measurements for SLA monitoring Delay Measurement (DM)

Delay Variation Measurement (DVM)

Loss Measurement (LM)

Expands on fault notification and isolation

Automatic Protection Switching (APS) G.8031

Ethernet Alarm Indication Signal function: Y.1731 ETH-AIS

Ethernet Test Signal function: Y.1731 ETH-TEST


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Service PerformanceManagement

Key Metrics for PerformanceMonitoring1. Frame/Packet Delay Latency (e.g. UNI/UNI [email protected]%@15min)

2. Frame/Packet Delay Variation Jitter (e.g. [email protected]%@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 metrics for items 1-3 Packet-based measurements (granularity to Class of Service)

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 IEEEThe combination of IEEE 802802..11ag, ITUag, ITU--T Y.T Y.17311731and MEFand MEF 1010..11 define Ethernet Service Performancedefine Ethernet Service Performance


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Point-to-Point EVCPoint-to-Point EVC

CarrierA

ENNI

UNI

UNI

Link OAM

802.3ah

E2E Service OAM:Fault-802.1ag

Perform-Y.1731

Carrier B

EnablingGlobal Interconnect

CoS

Alignment


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Summary

Implementation of Ethernet interconnects has begun and will rapidly

accelerate in 2010 To enable the growth of Carrier Ethernet, Interconnect SPs need to:

Deliver high reliability/up-time Commit-to and deliver SLAs Provide services efficiently with low OPEX

MEF specifications, certification and operational tools provide acommon and efficient framework for Carrier Ethernet interconnects UNI and ENNI specifications

OAM Solutions

P2P Link OAM (802.3ah) Link Fault Monitoring

E2E Service OAM (802.1ag) Service Fault Monitoring E2E Service OAM (Y.1731) Service Performance Monitoring

Enables the Global InterconnectEnables the Global Interconnect


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Thank YouThank You

For more information, visit:

www.metroethernetforum.org

Documents

Global Interconnect ENNI UNI OAM 2010 Jan 06