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An Overview of the MEF

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An Overview of the MEF Powered By Docstoc
					          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



                                         1
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

                                                       2
Carrier Ethernet Services and
         Challenges




                                3
 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
                                   WAN   OOF WAN
                             MAN
                       LAN

1999, Europe:
First Metro Ethernet




                                                        4
 Demand Drivers – Services and Bandwidth
          Education Remote learning             On-line Government         Healthcare date & Tele-medicine




                                                         $$
 NEW                                       $$                      $$
 tools!                               $$                            $$                                     Backhaul
 Apps!                                                                                                     Apps

                                       $$                          $$
                                                         $$
  VoIP
  VoD                                                                                                 Low CAPEX
 IPTV                                                                                                  Low OPEX
E-Line
E-LAN)                                                                                                Low Cost to
                                                                                                      Subscribers


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




                                                                                                                      5
The MEF 5-Attributes of Carrier Ethernet


             • Carrier Ethernet is a ubiquitous, standardized,
               carrier-class SERVICE defined by five
               attributes that distinguish Carrier Ethernet
Carrier        from familiar LAN based Ethernet
Ethernet
             • It brings the compelling business
               benefit of the Ethernet cost model
               to achieve significant savings


             • Standardized Services
             • Scalability
Carrier
Ethernet     • Service Management
Attributes
             • Reliability

             • Quality of Service




                                                                 6
 MEF defined Basic CE Services

E-LINE                                      Point-to-Point EVC                              Point to Point
  EPL: Private Line                                                             CPE          Site2Site L2 VPNs
  EVPL: Virtual Private Line CPE      UNI
                                                                   UNI




E-LAN                      CPE              Multipoint EVC                                  Multi-Point to Multi-Point
EP-LAN: Private LAN                 UNI
                                                                                UNI
                                                                                      CPE    Multi-Site L2 VPNs
EVP-LAN: Virtual Private                                                                     Transparent LANs
          LAN




                                                                          CPE
                                                                                              Point to Multi-Point
E-TREE                                                             UNI                         Broadcasting Services
                                                  Rooted Multipoint EVC
EP-Tree: Private Tree                                                                          Triple Play backhaul
EVP-Tree: Virtual Private     CPE     UNI
                                                                                               Mobile backhaul
          Tree
                                                                   UNI     CPE




                                                                                                                    7
Global Services crossing carrier boundaries


        UNI                                                     UNI

UNI                         Multi-point to
                                              Carrier C
                            Multi-point EVC   Access Provider



                           E-NNI


        Carrier A
                                                      E-NNI
        Service Provider
 UNI                                                                  UNI
                               Carrier B
                               Transport Provider




                                                                            8
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


                                                               9
Carrier Ethernet Network Basics




                                  10
    Carrier Ethernet Demarcation Points

  UNI         E-NNI
          Access Network   E-NNI      Transport     E-NNI    Ethernet Service     UNI
             Provider              Network Provider              Provider
Subscriber                                               EVC                    Subscriber

• 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


                                                                                        11
    Carrier Ethernet Service
         RUNI       VUNI1           VUNI2 and VUNI3

UNI1     Access Network
             E-NNI          E-NNI1    Transport       E-NNI2 Ethernet Service UNI2
        Terminating Tunnel          Transit Tunnel
                                   Network Provider              Provider
            Provider
Subscriber                 CEVC1                   CEVC2    EVC             Subscriber

  • 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

                                                                                   12
 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)




     UNI                                    E-NNI                                               UNI
                                                                                                      CE
                        Service Provider
                            Network                 Operator Network

CE          NID                                                                           NID



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




                                                                                                       13
Global Services crossing carrier boundaries


               UNI                                                    UNI

UNI                               Multi-point to
                                                    Carrier C
                                  Multi-point EVC   Access Provider



                                 E-NNI


              Carrier A
                                                            E-NNI
              Service Provider
 UNI                                                                         UNI
                                     Carrier B
                                     Transport Provider



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

                                                                                   14
Link and Service OAMs




                        15
OAM Layer Components


                                               E2E Performance
                                               Monitoring

                                               E2E Fault Monitoring

                                               P2P Link Fault
                                               Management




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


                                                                 16
 Link Fault Management OAM

    UNI                                                                  UNI

                                    E-NNI
                                                                   NID
       NID


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



• 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
              Carrier Ethernet network elements and NIDs

                                                                                17
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




                                                                                 18
 E2E Service OAM - Hierarchical Domains

   Customer                   Service Provider                  Customer

          UNI                        E-NNI                    UNI




                               Customer Domain
                                                                      Service
                                Provider Domain
                                                                      OAM

                                                  Operator
                                                                      Network
                Operator
                Domain                            Domain              OAM


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



                                                                                19
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
        Carrier Ethernet network elements and NIDs


                                                                  20
   Ethernet Service Continuity Check


 UNI                                              IP/MPLS Core
                               Metro                 Network                      Metro                                  UNI
                             Aggregation                                       Aggregation
         Access                                                                 Network                 Access
         Network              Network
                                                                                                        Network




MEP#1                                                                                                               MEP #2
                                            MIP                        MIP
                                 MIP                                                MIP
                     MIP               Maintenance Association (MA)                               MIP
   MEP #1
   CCMs sent every 10ms on     MEP #1                                        MEP #1                         MEP #2
                                                  MEP #1
   working/protect paths       No CCMs                                       Send CCMs with RDI             Initiate
                                                  Report CC fault to
   Check for CCMs received     received from                                 flag set                       protection
                                                  management
   from MEP #2 on              MEP #2 within                                                                switchover
                                                  system
   working/protect paths       30ms (3 x 10ms)    MEP #2                     MEP #2
   MEP #2                                         Report on CC fault         Remote alarm detected
   CCMs sent every 10ms                           if no CCMs are             by received RDI
   Check for CCMs                                 received from MEP          Report alarm to
   received from MEP #1                           #1 for 30ms                management system


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

                                                                                                                           21
  Ethernet Link Trace

UNI                                            IP/MPLS Core
                             Metro                Network             Metro                             UNI
        Access             Aggregation                              Aggregation         Access
        Network             Network                                  Network            Network




      MEP         MIP                    MIP                  MIP                 MIP             MEP




                        Link trace Reply



             Ethernet Link Trace is analogous to IP’s Traceroute



                                                                                                              22
    Service Performance Management
•   Key Metrics
     1. 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
           and MEF 10.1 define Ethernet service performance

                                                                        23
Interfaces and Ethernet Virtual Circuits

                          E2E Service OAM:
                          Fault-802.1ag
                          Perform-Y.1731
                                                                       UNI
                                                                                UNI
                             Point-to-Point EVC


                                                                                      Point-to-Point EVC
               UNI                                                  Carrier B
   Link OAM                                   E-NNI
   802.3ah
                                                                                 UNI
                     Carrier A
                                                  Multi-point to
                                                  Multi-point EVC

              UNI                   UNI




                                                                                                           24
    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


                                                            25
Wholesale Logistics




                      26
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




                                                                 27
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




                                                                 28
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)

                                                             29
 Service Provider Participants
                           Service Provider and Cable MSO Members



• AboveNet                    • KDDI R&D Laboratories          • Sprint
• Alpheus Communications      • KPN Telecom                    • Suddenlink
• AT&T                        • Level 3 Communications         • Swisscom
• Bell Canada                 • ntl: Telewest                  • Symphony Communication
• Bright House Networks       • NTT Advanced Technology        • TATA Communications
• British Telecom             • Optimum Lightpath              • Telecom Italia
• Cable & Wireless            • Orange Business Services       • Telekom Malaysia
• Charter Communications      • PCCW                           • Teliasonera AB
• China Telecom               • PT Inovação                    • Telus
• Cincinnati Bell             • PT Prime                       • Time Warner Cable
• Colt                        • Qwest Communications           • Time Warner Telecom
• Comcast                     • RCN Business Solutions         • T-Systems
• Cox Business                • Reliance Communications        • Uecomm
• Demand Broadband            • Shanghai Information Network   • Verizon Business
• Embarq                      • Singapore Telecom              • XO Communications
• IPC




                                                                                          30
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




                                                          31
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


                                                                 32
WAIG Template (cont.)

 6.  Network Management
      • Maintenance Points for Fault, Performance OAM options
      • OAM Protocol options
      • Administrative options
      • Wholesale partner administrative and logistical options
 7. Performance and SLA Reporting Capability
      • On and Off-line performance reporting options
 8. Security
      • Threat detection and defense options
 9. Connection Admission Control (CAC) Rules
      • CoS traffic handling
 10. EVC and NNI Speeds
      • Throughput information




                                                                  33
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




                                                           34
Carrier Ethernet’s “Evolution”

                      2008, Metro Ethernet
                          We are here




                       WAN       OOF WAN
                MAN

          LAN

                                         Finish E-NNI
                                         Finish NID
                                         Refine GS Directory – add SPs
                                         Release WAIG Template




                                                                     35
         Thank You

 Presentations are available
             at
www.metroethernetforum.org

                               36

				
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