Documents
Resources
Learning Center
Upload
Plans & pricing Sign in
Sign Out

Multi Domain Traffic Engineered Transport Networks E OTN PTN Pips

VIEWS: 106 PAGES: 32

Multi Domain Traffic Engineered Transport Networks E OTN PTN Pips

More Info
									    Multi Domain Traffic Engineered
   Transport Networks (E-OTN, PTN)
 supporting P2P, P2MP, RMP and MP2MP
            Ethernet Services

     An overview of architecture and
functionality in terms of 802.1Q modelling



              Maarten Vissers
               2010-11-08
              Introduction

E-OTN and PTN are multi domain, traffic
engineered transport networks which support
P2P, P2MP, RMP and MP2MP Ethernet services
OTN network contains multiple OTN carrier
networks
OTN carrier networks contain OTN access, metro
and core domains
OTN network contains OTN network termination
(NT), electrical switching and optical switching
(SW) equipment
OTN equipment at edge of domains is extended
with Ethernet Switch functionality

                                                   2
OTN Access                                                EOTN example
                                                                                                                                MAC Relay functions
                                                                                                                              MAC Relay functions are
                             Ethernet
                                                                                                                              interconnected via OTN
                    OE
                    OE
                              Switch
 NT
                                                                                                                                 ODU connections


                           ODU
                           ODU
                           ODU
                                                            OTN Metro



                                         OE
                                         OE
                                         OE
                                         OE
              OE
              OE   ODU XC

                   OE
                   OE


                             OE
                             OE
 NT                                                                                         OE        Ethernet
             OEO
             OEO    OCH XC/ADM
                      OCH XC
                         N-degree ROADM
                                                    OEO
                                                    OEO
                                                    OEO
                                                            OCH XC/ADM
                                                               N-degree ROADM
                                                                                            OE         Switch
                                                                                                                                         OTN Core




                                                                                                    ODU
                                                                                                    ODU
                                                                                                    ODU
             OEO




                                                                                                              OE
                                                                                                              OE
                                                                                                              OE
                                                                                                              OE
 NT
                                                                                      OE
                                                                                      OE    ODU XC
 NT




                                                                                            OE
                                                                                            OE


                                                                                                     OE
                                                                                                     OE
       OE                                                                                                               OEO
       OE    ODU XC                                                                                                                 OCH XC
                                                OEO                                                                     OEO
                                                OEO       OCH XC/ADM             OEO
                                                                                                   OCH XC               OEO       N-degree ROADM
             OE
             OE

                    OE
                    OE




                                                OEO          N-degree ROADM      OEO
 NT   OEO
                                                                                 OEO             N-degree ROADM

      OEO     OCH XC/ADM
      OEO     N-degree ROADM




 NT                                                                                                                                       OEO
                            Ethernet                                                                                                      OEO        OCH XC
                   OE                                                                                                                              N-degree ROADM
                   OE                                                                                                                     OEO
                             Switch                                                                Ethernet
                                                OTN Metro                              OE
                          ODU
                          ODU
                          ODU

                                    OE
                                    OE
                                    OE
                                    OE




                                                                                       OE           Switch
 NT




                                                                                                 ODU
                                                                                                 ODU
                                                                                                 ODU


                                                                                                          OE
                                                                                                          OE
                                                                                                          OE
                                                                                                          OE
             OE
             OE    ODU XC
                                                                                                                    OEO
                                                OEO
                                                          OCH XC/ADM                                                OEO           OCH XC
                   OE
                   OE


                            OE
                            OE




                                                OEO                              OE
                                                OEO          N-degree ROADM      OE        ODU XC                   OEO         N-degree ROADM
            OEO
            OEO    OCH XC/ADM
                     OCH XC
                                                                                       OE
                                                                                       OE


                                                                                                  OE
                                                                                                  OE
 NT         OEO         N-degree ROADM


                                                                                OEO
                                                                                OEO              OCH XC
                                                                                OEO         N-degree ROADM


 NT
                                              OEO
                                              OEO     OCH XC/ADM                                                     MAC Relay functions
                                                                                                                   MAC Relay functions are
       OE
                                                                                                                   interconnected via OTN
                                              OEO         N-degree ROADM
       OE    ODU XC

                                                                                                                      ODU connections
                                                                                                                    ODU connections or S-
             OE
             OE

                    OE
                    OE




                                                                                                                      or I-Tagged LANs
      OEO     OCH XC/ADM
      OEO
      OEO     N-degree ROADM



                                                                                                    Ethernet                  Hybrid Ethernet &                 OTN/EOTN
                                                                  OTN Network                                                                         SW
                                                    NT                                NT            Network        NT         OTN Network                       Switch
                                                                  Termination
                                                                                                    Termination               Termination                                  3
            EOTN and PBN

EOTN adds one transport VLAN layer on top of its
OTN layer stack
EOTN can be viewed in this respect as a transport
PBN in which the 802.3 physical ports are
replaced by G.709/G.7041 physical ports and
TPMR type reserved address transparency
EOTN deploys the 802.1Q features complemented
by specific transport network features defined in
Y.1731, G.8021, G.8031, G.8051 and G.8052




                                                    4
              802.1Q Provider (Edge) Bridges
                                                                                               (starting point)
                                                                                                                                                              Customer
                                        Provider Edge Bridge                                                            Customer Edge Ports                    System
                                                                                                                 C-VLAN
                                                                                                                C-VLAN
       Provider                                                                                                C-VLAN
                                                                                                                Component
                                                                                                               Component
                                                                                                              Component
                                                                                                                   81-00




                                                   S-VLAN Component with 88-a8 and Table 8-2
       Network                                                                                                    81-00
                                                                                                                81-00
                                                                                                                 Table 8-1
                                                                                                                Table 8-1
                                                                                                               Table 8-1
        Ports                                                                                                                C-tagged service interfaces                                      Customer’s
                                                                                                                                      (CTSI)               S-tagged service interface       Provider Bridge
                                                                                                                  Provider Edge Port                                (STSI)
                                                                                                                                                                                                S-VLAN
         Provider Bridge                                                                                                                                                                   PNP Component
                                                                                                Customer Network Port                                                                            88-a8
             S-VLAN                                                                                                                                                                             Table 8-2
            Component                                                                                                C-tagged service interfaces
                                                                                                                                                            Port-based service interface
              88-a8
                                                                                                                 C-VLAN
                                                                                                                C-VLAN                                                (PBSI)
             Table 8-2                                                                                         C-VLAN
                                                                                                                Component
                                                                                                               Component
                                                                                                              Component
                                                                                                                   81-00
                                                                                                                  81-00                                    Access Network’s
                                                                                                                81-00 8-1
                                                                                                                 Table
                                                                                                                Table 8-1                       S-VLAN     Provider Bridge
                                                                                                               Table 8-1                      S-VLAN
                                                                                                                                             S-VLAN
                                                                                                                                              Component
         Provider Bridge                                                                                                                     Component          S-VLAN
                                                                                                           Provider Access Ports            Component
                                                                                                                                                 88-a8
                                                                                                                                                88-a8          Component
                                                                                                                                              88-a8 8-2
                                                                                                                                               Table
             S-VLAN                                                                                                                           Table 8-2          88-a8
                                                                                                                                             Table 8-2
            Component                                                                                                                                           Table 8-2
              88-a8
             Table 8-2
                                                                                               Port-based service interface
                                                                                                                   Remote customer service interfaces
        Provider Network                                                                                                       (RCSI)

              Ports                                                                                                Provider Network Ports



 S-VLAN Components operating on
 TPID 88-a8 with S-VLAN Reserved
Address transparency (Table 8-2), IVL
  and SVL (multi-vid E-Tree), VID
      translation, xSTP/xVRP



                                                                                                                                                                                                              5
          802.1Q port types


Many of the 802.1Q port types are
variations of a common port which
supports
  a single VLAN multiplexing instance (clause
  6.9) with configurable:
    Tag type (TPIDs: 81-00, 88-a8),
    Acceptable Frames Type
    untagged set member
  Up MEPs, Up MIPs
  Down MIPs, Down MEPs
  Down MEP below clause 8.5

                                                6
                              802.1Q port types
                                          Specific Configurations of Common Port

                                    CEP     PEP   CNP      CNP     PNP    RCAP     PAP   Common
                                                   port    tag’d                           Port
                                                  based
Tag type                            C        C      S       S       S        S     S      C/S
Admit Only VLAN-tagged frames       Y        Y      N       Y       Y       Y      N      Y/N
Admit Only Untagged and Priority-   Y        N      Y       N       N       N      Y      Y/N
tagged frames

Admit All frames                    Y        Y      N       ?       N        ?     N      Y/N
PVID                                Y        Y      Y                       Y      Y      Y/N
Enable Ingress Filtering                            N       Y                      N      Y/N
Member of untagged set              O        O      Y               N        -     Y      Y/N
Up MEP                              N        N      Y       Y       N       N      N      Y/N
Up MIP                              Y        N     N|Y      Y       Y       N      N      Y/N
Down MIP                            Y        N     N|Y      Y       Y       N      N      Y/N
Down MEP                            N        N      N       N       N       N      N      Y/N
Down MEP below c8.5                 Y        N     N|Y      Y       Y       Y      N      Y/N
                                                                                                  7
                         EOTN (Edge) Bridges
                         (based on provider (edge) bridges)
                                                                                                               Customer
                          EOTN Edge Bridge                                                                      System
    OTN                                                      C-VLAN
                                                            C-VLAN
                                                           C-VLAN
                                                            Component
   Network                          V        CNP           Component
                                                      PEP Component
                                                               81-00
                                                              81-00
                                                                                                        CTSI
                                                             81-00 8-1
                                                             Table8-1 CEP
    Ports                           L        CNP
                                                            Table8-1
                                                      PEP Table
                                    A                                                                                          Customer’s
                                    N                                                                                        Provider Bridge
                                                                                                         Transparent Service      S-VLAN
     EOTN Bridge                                                                                               Interface
                                             CNP                                                                             PNP Component
                                    C                                                                   Port Based Service         88-a8
   ONP     VLAN    ONP                                                                                                            Table 8-2
         Component
                                    o        CNP                                                             Interface
                                                              C-VLAN
                                                             C-VLAN
   ONP            ONP       ONP     m                       C-VLAN
                                                             Component
                                                            Component
                                         CNP           PEP Component
                                    p                           81-00
                                                               81-00
                                                              81-00
                                                                                                            Customer’s
                                                              Table 8-1 CEP
                                                             Table 8-1
                                                                               PAP
                                                                                         S-VLAN
                                                                                       S-VLAN             Provider Bridge
                                    o        CNP       PEP Table 8-1                   Component
                                                                                      S-VLAN
                                                                                      Component              S-VLAN
     EOTN Bridge                    n                                                     88-a8
                                                                                     Component
                                                                                         88-a8
                                                                                        Table 8-2
                                                                                       88-a8 8-2 RCAP   PNP Component
                             ONP                   Individual S-VLAN Service           Table
                                    e                                                 Table 8-2
                                                                                                              88-a8
   ONP     VLAN    ONP                       CNP            Interface          PAP                           Table 8-2
         Component                  n
                                                                               PNP
   ONP            ONP               t




EOTN’s VLAN Component deploys:
   • ONP instead of PNP ports, and
• transport Ethernet specific features

                                                                                                                                               8
       OTN Network Port functionality
      OTN Network Ports combine 802.1Q’s Provider Network
      Port functionality with an OTN physical layer
              Ethernet MEP and MIP functions
                 Includes support for Y.1731 Ethernet OAM, G.8021 OAM
                 processing and G.8031 APS OAM
              Ethernet to OTN (de)mapping/(de)muxing functions:
                 Support of the EISS  Tag insertion/extraction
                 Support of the ISS by additional technologies  GFP-F/OTN
                                               Frame filtering (8.6.3)
                                                                                                           Supports
                               EISS                                               EISS
                    Up MPs (6.17, 19.2, 19.3)             O              Up MPs (6.17, 19.2, 19.3)
                                                                                                          G.8031 SNC
                             EISS                         T                       EISS                     Protection
                Port filtering entities (8.6.1/2/4/5)     N       Port filtering entities (8.6.1/2/4/5)
                                EISS                                              EISS                      Supports
                   Down MPs (6.17, 19.2, 19.3)           N           Down MPs (6.17, 19.2, 19.3)          Y.1731 OAM
      PNP                    EISS                        E                     EISS

equivalent      Linktrace Output Multiplexer (19.5)      T       Linktrace Output Multiplexer (19.5)
                              EISS                       W                     EISS
                   Queuing entities (8.6.6/7/8)          O           Queuing entities (8.6.6/7/8)
                             EISS                        R                     EISS                        Tagging
                      Support of the EISS                K              Support of the EISS
                              ISS                                               ISS
                 Support of the ISS by additional                  Support of the ISS by additional
                                                          P
                      technologies (6.15)                               technologies (6.15)
      OTN                                                 O                                                 GFP-F
                        OTN ODU Down MP                   R                 OTN ODU Down MP
   specific                                               T
                       OTN other functions                s                OTN other functions
                                                                                                                        9
            ODUk with GFP-F encapsulated
            Ethernet frames with VLAN Tag
                16                                          3808

            O
            D                                                                                         4
            U
            k

                                                                   GFP IDLEs
 ODUk
bit rates
 1.25G
  2.5G                        PLI                      cHEC           GFP Core Header
 3.75G
                PTI         EXI     UPI                tHEC           GFP Payload Header
                      PFI




   5G                                                                      PTI=000:   Client Data
 6.25G                                    DA                               PFI=0:     no Payload FCS
  7.5G                        DA                       SA                  EXI=000:   Null Extension Header
                                                                           UPI=0000 0001: Frame Mapped Ethernet
 8.75G                                    SA
                             TPID          PCP           VID
                                                 DEI




  10G                                                                 VLAN Tag
 11.25G                      TYPE
     :
     :
                                      MAC SDU
  100G


                                      MAC FCS
EOTN service set




                   11
                EOTN Requirements
http://www.ieee802.org/1/files/public/docs2010/liaison-itut-sg15-oLS-197-0710.docx




 Transport all MEF (G.8011.x) services over
 OTN
 Transport all 802.1 service interfaces over
 OTN
 Support the management of all above
 services simultaneously using a single
 forwarding function
 Transport by using a unique edge-to-edge
 layer that is separated from the customer

                                                                                     12
       EOTN Edge Bridge –
        Extended service set


EOTN is required to support any type of
Tagged service, including bundled S-
Tagged and I-Tagged services, over a
single Ethernet (ETH) layer
EOTN Edge Bridge can support those
services by deploying additional CNPs and
CBPs and connecting those to customer
PIPs and CBPs as illustrated in the next
slide

                                            13
                              EOTN Edge Bridge –
                                 Extended service set
                                                                                                               Customer
                              EOTN Edge Bridge                                                                  System
                                                                   C-VLAN
                                                                  C-VLAN
                                                                 C-VLAN
                                                                  Component
                                                 CNP             Component
                                                            PEP Component                               CTSI
                                                                     81-00
                                                                    81-00
                                                                   81-00 8-1
                                                                   Table8-1 CEP
                                                                  Table8-1
                                                 CNP        PEP Table
                                                                                                                                   Customer’s
                                                                                                                                 Provider Bridge
                                                                                                          Transparent Service      S-VLAN
         EOTN Bridge                                                                                            Interface
                                        V        CNP                                                                          PNP Component
                                                                                                         Port Based Service         88-a8
            VLAN
      ONP
          Component
                    ONP                 L        CNP                                                          Interface            Table 8-2
                                        A                         C-VLAN
                                                                 C-VLAN
      ONP            ONP        ONP                             C-VLAN
                                                                 Component
                                                                Component
                                        N    CNP           PEP Component
                                                                    81-00
                                                                   81-00                                    Customer’s
                                                                  81-00
                                                                  Table 8-1 CEP    PAP                    Provider Bridge
                                                                 Table 8-1                 S-VLAN
                                                 CNP       PEP Table 8-1                 S-VLAN
                                                                                         Component
                                                                                        Component
         EOTN Bridge                    C                                                   88-a8
                                                                                        S-VLAN
                                                                                           88-a8
                                                                                                              S-VLAN
                                                                                          Table 8-2
                                                                                       Component RCAP    PNP Component
                                 ONP    o              Individual S-VLAN Service         Table 8-2
                                                                                         88-a8                 88-a8
                                                 CNP            Interface          PAP Table 8-2         PNP Table 8-2
      ONP     VLAN    ONP               m
            Component
      ONP            ONP                p          bundled S-VLAN service
                                        o        CNP      interface                PNP
                                                                                                            Customer’s
                                        n                                                               I-BEB/B-BEB/T-BEB
                                        e                  BSI transparent service interface                      T-
 Reuse of existing CNP and              n        CNP                                                     PIP
                                                                                                               Component
                                                                                                                           CNP
   CBP ports on the EEB                 t                  BSI transparent service interface
                                                 CNP                                                     PIP      I-     CNP
  supports BSI individual                                 BSI (bundled) service interface                      Component
  and/or bundled services,                       CBP                                                     PIP               CNP
transparent services and S-                               BSI (bundled) service interface
                                                 CBP                                                    CBP       B-     PNP
    VID/S-PCP/S-DEI                                        BSI transparent service interface                   Component
  preserving (bundled) S-                        CNP                                                    CBP                PNP

      Tagged services                                                                                                                              14
      EOTN (Edge) Bridges –
              Transparency

Support of Transparent Services by the
EOTN’s Ethernet service (ETH VC) layer
requires TPMR type transparency (Table 8-
3)
S-Tag does not provide such transparency
EOTN should deploy a new VLAN Tag
associated with:
  TPMR type transparency
  Transport network type operation,
  management and control

                                            15
Choice of Tag in EOTN (Edge) Bridge
  Tag choice
     New Transport VLAN Tag with 12-bit T-VID (ETH VC ID) &
     TPMR Reserved Address transparency (table 8-3/802.1Q)
                              16               3      1                12
      New VLAN Tag




                                                      DEI
                         TPID = xx-xx         PCP               T-VID (ETH VC ID)
      4-octets

     I-Tag with 24-bit I-SID; UCA-bit deals with T-VLAN (ETH VC)
     frames with or without network MAC addresses (N-DA, S-DA)
                         16              3    1 1 1         2                       24




                                              UCA
                                                    RES1
                                              DEI
      I-Tag          TPID = 88-E7       PCP                RES2              I-SID (ETH VC ID)
      18-octets
                                                             DA
                                                             SA

  Tag is terminated in the “Support of the EISS” functions in
  ONP
     vlan_identifier parameter represents in EM_UNITDATA the 12-
     bit T-VLAN ID or 24-bit I-SID
     Existing devices already support VLAN Tag with 12-bit ID;
     EtherType is configurable per port
     Devices do not support an I-SID based vlan_identifier
     parameter
  VLAN Tag with new “Transport VLAN” type TPID
  value is best fit
                                                                                                 16
                                    EOTN port types
                    (based on provider (edge) bridge ports)
                                         Specific Configurations of Common Port

                                    CEP     PEP    CNP     CNP     PNP   RCAP     PAP   Common   ONP
                                                    port   tag’d                          Port
                                                   based
Tag type                             C       C     S/T      S       S       S     S      C/S/T    T
Admit Only VLAN-tagged frames        Y       Y      N       Y       Y       Y     N      Y/N     Y
Admit Only Untagged and Priority-    Y       N      Y       N       N       N     Y      Y/N     N
tagged frames

Admit All frames                     Y       Y      N        ?      N       ?     N      Y/N     N
PVID                                 Y       Y      Y                       Y     Y      Y/N
               Same basic set of ports
Enable Ingress Filtering          N   Y                                           N      Y/N     N
                  Additional Tag type
Member of untagged set    O   O   Y                                 N       -     Y      Y/N     N
Up MEP                    N   N   Y
                 Additional Port type Y                             N       N     N      Y/N     N|Y
Up MIP                               Y       N     N|Y      Y       Y       N     N      Y/N     Y
Down MIP                             Y       N     N|Y      Y       Y       N     N      Y/N     Y
Down MEP                             N       N      N       N       N       N     N      Y/N     N|Y
Down MEP below c8.5                  Y       N     N|Y      Y       Y       Y     N      Y/N     N
                                                                                                       17
                              EOTN (Edge) Bridge

                                                                                                                                                         Customer
                              EOTN Edge Bridge                                                                                                            System
                                                                                                        C-VLAN
                                                                                                       C-VLAN
        EOTN Bridge                                                                                   C-VLAN
                                                                                                       Component
                                                                                      CNP             Component
                                                                                                 PEP Component                                    CTSI
          T-VLAN                                                                                          81-00
                                                                                                         81-00
                                                                                                        81-00 8-1
                                                                                                        Table8-1 CEP
     ONP Component ONP                                                                                 Table8-1
                                                                                      CNP        PEP Table




                                        T-VLAN Component with <T-Tag> and Table 8-3
          <T-Tag>
     ONP Table 8-3 ONP          ONP
                                                                                                                                                                             Customer’s
                                                                                                                                                                           Provider Bridge
                                                                                                                                                    Transparent Service      S-VLAN
                                                                                      CNP                                                                 Interface     PNP Component
        EOTN Bridge                                                                                                                                Port Based Service         88-a8
                                 ONP                                                  CNP                                                               Interface            Table 8-2
          T-VLAN
     ONP Component ONP                                                                                 C-VLAN
                                                                                                      C-VLAN
                                                                                                     C-VLAN
                                                                                                      Component
          <T-Tag>                                                                                    Component
                                                                                      CNP       PEP Component
                                                                                                         81-00
                                                                                                        81-00                                         Customer’s
     ONP Table 8-3 ONP                                                                                 81-00
                                                                                                       Table 8-1 CEP         PAP
                                                                                                      Table 8-1                      S-VLAN         Provider Bridge
                                                                                      CNP       PEP Table 8-1                      S-VLAN
                                                                                                                                   Component
                                                                                                                                  Component             S-VLAN
                                                                                                                                      88-a8
                                                                                                                                  S-VLAN
                                                                                                                                     88-a8
                                                                                                                                    Table 8-2
                                                                                                                                 Component RCAP    PNP Component
                                                                                            Individual S-VLAN Service              Table 8-2             88-a8
                                                                                                                                   88-a8           PNP Table 8-2
  T-VLAN component is a                                                               CNP            Interface               PAP Table 8-2
   VLAN type Component
                                                                                            bundled S-VLAN service
operating on TPID: <T-Tag>                                                            CNP          interface                 PNP
    with TPMR Reserved                                                                                                                                Customer’s
Address transparency (Table                                                                                                                       I-BEB/B-BEB/T-BEB
                                                                                                 BSI transparent service interface                          T-
  8-3), ONP instead of PNP                                                                                                                               Component
                                                                                      CNP                                                          PIP               CNP
 ports, IVL and SVL (multi-                                                                       BSI transparent service interface
     vid E-Tree/E-LAN),                                                               CNP                                                          PIP      I-     CNP
 independent ingress/egress                                                                       BSI (bundled) service interface                        Component
  VID translation, disabled                                                           CBP                                                          PIP               CNP
 xSTP/xVRP, Y.1731/G.8021                                                                         BSI (bundled) service interface

 OAM and G.8031 Ethernet                                                              CBP                                                         CBP       B-     PNP
                                                                                                  BSI transparent service interface                      Component
   VLAN SNC protection.
                                                                                      CNP                                                         CBP                PNP
                                                                                                                                                                                             18
         ODUk with GFP-F encapsulated
        Ethernet frames with T-VLAN Tag
                16                                          3808

            O
            D                                                                                         4
            U
            k

                                                                   GFP IDLEs
 ODUk
bit rates
 1.25G
  2.5G                        PLI                      cHEC           GFP Core Header
 3.75G
                PTI         EXI     UPI                tHEC           GFP Payload Header
                      PFI




   5G                                                                      PTI=000:   Client Data
 6.25G                                    DA                               PFI=0:     no Payload FCS
  7.5G                        DA                       SA                  EXI=000:   Null Extension Header
                                                                           UPI=0000 0001: Frame Mapped Ethernet
 8.75G                                    SA
                     TPID=<T-Tag>          PCP          T-VID
                                                 DEI




  10G                                                                 Transport-VLAN Tag
11.25G                   TYPE
    :
    :
                                      MAC SDU
 100G


                                      MAC FCS
EOTN summary




               20
              EOTN Summary

EOTN requires a minimal extension of 802.1Q functions and
ports:
  Additional OTN Network Port with a Support of the EISS
  function which operates on a new T-Tag associated with TPMR
  Reserved Address transparency
  Existing CNPs and CBPs with a Support of the EISS function
  which operates on a new T-Tag associated with TPMR
  Reserved Address transparency




                                                                21
PTN




      22
Q.9/15 liaison on G.ptneq: “Next Step”
 http://www.ieee802.org/1/files/public/docs2010/new-itu-1-G-ptneq-IEEE-Final-0510-v1.ppt




     PTN VC/VP/VS layers may be supported
     by the Ethernet technology including ETH
     OAM(Y.1731,G.8021), ETH protection
     switching(G.8031,G.8032), ETH
     connection management (G.8051,
     G.8052).
     The use of Ethernet technology in PTN
     requires an extension of the tagging
     option defined in 802.1Q to support VC,
     VP, VS stacking in single and multi-
     domain scenarios.
     ITU-T Q9/15 would like to progress this
     work in cooperation with IEEE 802.1
                                                                                           23
                Ethernet PTN

Ethernet PTN network contains a PBN like transport
VLAN (ETH VC) layer (same as EOTN)
Those transport VLANs
may be transported in P2P                                         Customer/Client service Layer

server VLANs (ETH VPs)
  instead of in P2P ODUs in EOTN,




                                    Channel
                                                                        Virtual Channel Layer
  or P2P LSPs in MPLS-TP/VPLS
This requires PTN Network

                                    Path
                                                                Virtual Path Layer (optional)




                                                                                                         PTN layer networks
Ports (PTNP) which                                       Virtual Section Layer (optional)
support 2-stage VLAN                Transmission Media


multiplexing and optional
                                                                   GFP
                                                         Circuit Switching Technology
                                                              (OTN, SDH, PDH)
                                                                                        Physical Media
priority-tagging                                           Physical Media
                                                          (OTM-n, STM-n, DSn/En,
                                                                                           (802.3)

                                                                  xDSL)



                                                                                                         24
                 PTN Network Port (PTNP)

                                                                                  Frame filtering (8.6.3)
                                                                 EISS                                          EISS
                                   Up MPs (6.17, 19.2, 19.3)
                                                EISS
                               Port filtering entities (8.6.1/2/4/5)
                                 EISS                              EISS     ISS
                       Down MPs (6.17, 19.2, 19.3)
                                 EISS
                   Linktrace Output Multiplexer (19.5)
     P                          EISS

     T
                       Support of the EISS (6.9)                                                            VC Tag
                 ISS                    NxISS                    EISS
     N                             Down MPs (6.17, 19.2, 19.3)
                                             EISS
     P
                               Linktrace Output Multiplexer (19.5)
                                            EISS
                                   Support of the EISS (6.9)                                                VP Tag
                            ISS                      ISS                    ISS
                                                  Down MPs (6.17,19.2)
                                                    ISS
                                           Linktrace Output Multiplexer (19.5)
                                          ISS                   ISS
                                                        Priority Tag (6.13)
                 ISS         ISS          ISS                   ISS
                                                                                                            VS Tag
                                    Support of the ISS (6.7)

                                              MAC


PTN-Tagged LAN
                                                                                                                      25
                    Hierarchy

Multi-stage connection hierarchy is a normal
means deployed in the latest generation circuit
and packet transport networks to scale these
networks
  OTN supports up to 4 ODU multiplexing stages (more to follow)
  MPLS-TP supports an unrestricted number of LSP
  multiplexing stages
An Ethernet based PTN should have the capability
to support such multi-stage connection hierarchy
VLAN Tags should therefore be stackable
  VP and VS transport VLANs are P2P VLANs (without MAC
  based forwarding) set up by transport network
  management and control systems
                                                                  26
     Hierarchy for multiple domains

Domain 1       Domain 2        Domain 3   In multi-domain case the layer
                                          relationship is relative and the
                 VC
   VP      V     VP       V      VP       names represent their role in
   VS      S     VS       S      VS       each domain; some examples:
                                             Top
                 VC                            Default case, no additional
    VP                    VC                   hierarchy
    VS             VP            VC
                                             Middle
                   VS            VP
                                 VS            VP in Domain 1 is VC in Domain 2
                                               VP in Domain 2 is VC in Domain 3
                 VC
                 VP                          Bottom
    VS                    VC                   VS in Domain 1 is VC in Domain 2
                          VP                   VS in Domain 2 is VC in Domain 3
                    VS           VC
                                 VP       Each domain operates on the
                                 VS       lower three layers and is
                                          unaware of the higher layers
                                                       Page 27
                               Domain interconnect examples
                                                                          VLAN Hierarchy Extension


                                                DOMAIN A                         DOMAIN B
                                                                                                                                                                Frame filtering (8.6.3)
             EISS                                                                                                                           EISS                                                       EISS
                          Up MPs (6.17, 19.2, 19.3)                                                     Up MPs (6.17, 19.2, 19.3)                                                                                   Up MPs (6.17, 19.2, 19.3)

                                     EISS                                                                             EISS                                                                                                     EISS
                     Port filtering entities (8.6.1/2/4/5)                                          Port filtering entities (8.6.1/2/4/5)                                                                      Port filtering entities (8.6.1/2/4/5)
ISS          EISS                                 EISS                                            EISS                                      EISS          ISS                             ISS          EISS                                  EISS
                                       Down MPs (6.17, 19.2, 19.3)                       Down MPs (6.17, 19.2, 19.3)                                                                                                              Down MPs (6.17, 19.2, 19.3)

                                                   EISS                                             EISS                                                                                                                                      EISS
                                    Linktrace Output Multiplexer (19.5)               Linktrace Output Multiplexer (19.5)                                                                                                      Linktrace Output Multiplexer (19.5)

                                                  EISS                                            EISS                                                                                                                                       EISS
                                       Support of the EISS (6.9)                         Support of the EISS (6.9)                                                                                                                Support of the EISS (6.9)

             EISS                       NxISS                             ISS   ISS                            NxISS                        EISS                                                       EISS                        NxISS                             ISS
                        Down MPs (6.17, 19.2, 19.3)                                                    Down MPs (6.17, 19.2, 19.3)                                                                                Down MPs (6.17, 19.2, 19.3)
                                     EISS                                                                           EISS                                                                                                        EISS
                     Linktrace Output Multiplexer (19.5)                                            Linktrace Output Multiplexer (19.5)                                                                        Linktrace Output Multiplexer (19.5)

                                   EISS                                                                          EISS                                                                                                        EISS
                        Support of the EISS (6.9)                                                       Support of the EISS (6.9)                                                                                 Support of the EISS (6.9)
ISS                       ISS                                ISS                              ISS                             ISS                         ISS                             ISS                       ISS                                ISS
            Down MPs (6.17,19.2)                                                                                            Down MPs (6.17,19.2)                                                      Down MPs (6.17,19.2)
                              ISS                                                                                           ISS                                                                                          ISS
      Linktrace Output Multiplexer (19.5)                                                                           Linktrace Output Multiplexer (19.5)                                         Linktrace Output Multiplexer (19.5)

               ISS                          ISS                                                               ISS                         ISS                                                            ISS                           ISS
      Priority Tag (6.13)                                                                                                          Priority Tag (6.13)                                          Priority Tag (6.13)

               ISS                          ISS              ISS          ISS   ISS           ISS             ISS                           ISS                                                          ISS                           ISS             ISS           ISS
                            Support of the ISS (6.7)                                                    Support of the ISS (6.7)                                                                                      Support of the ISS (6.7)


                                     MAC                                                                            MAC                                                                                                         MAC




                                                                                      VCAVPAVSAVPA=VCBVPBVSB
                                                                           VCAVPAVSA=VCBVPBVSB
                                                                                                                                                                                                                                                                 28
                          E-PTN (Edge) Bridges
                         (based on eotn (edge) bridges)
                                                                                                                                                   Customer
    PTN                    E-PTN Edge Bridge                                                                                                        System
                                                                                                       C-VLAN
                                                                                                      C-VLAN
   Network                                                                         CNP       PEP
                                                                                                      Component
                                                                                                     Component
                                                                                                     C-VLAN                                 CTSI
                                                                                                         81-00
                                                                                                        81-00
    Ports                                                                                           Component CEP
                                                                                                       Table 8-1
                                                                                                      Table 8-1
                                                                                                       81-00
                                                                                   CNP       PEP
                                                                                                     Table 8-1                                                       Customer’s
       E-PTN Bridge                                                                CNP       MPEP                                                                  Provider Bridge



                                     T-VLAN Component with <T-Tag> and Table 8-3
         T-VLAN                                                                                                                               Transparent Service      S-VLAN
   PTNP Component PTNP                                                                                                                              Interface
                                                                                   CNP                                                                            PNP Component
         <T-Tag>                                                                                                                                                        88-a8
                                                                                                                                             Port Based Service
   PTNP Table 8-3 PTNP       PTNP                                                  CNP                                                            Interface            Table 8-2
                                                                                                    C-VLAN
                                                                                                   C-VLAN
                                                                                                  C-VLAN
                                                                                                   Component
                                                                                                  Component
                                                                                   CNP       PEP Component
                                                                                                      81-00
                                                                                                     81-00                                      Customer’s
                                                                                                    81-00
                                                                                                    Table 8-1 CEP     PAP                     Provider Bridge
      E-PTN Bridge                                                                                 Table 8-1                  S-VLAN
                                                                                                                            S-VLAN
                                                                                   CNP       PEP Table 8-1                  Component
         T-VLAN              PTNP                                                                                          Component              S-VLAN
                                                                                                                               88-a8
   PTNP Component PTNP                                                                                                        88-a8
                                                                                                                           S-VLAN 8-2RCAP
                                                                                                                             Table           PNP Component
         <T-Tag>                                                                         Individual S-VLAN Service          Table 8-2
                                                                                                                          Component                88-a8
                                                                                                                                             PNP Table 8-2
   PTNP Table 8-3 PTNP                                                             CNP            Interface           PAP   88-a8
                                                                                                                           Table 8-2

                                                                                     S-VLAN bundled service
                                                                                   CNP     interface                  PNP
                                                                                                                                                Customer’s
ONPs are replaced                                                                  CNP                               MPNP                   I-BEB/B-BEB/T-BEB
   by PTNPs                                                                                  BSI transparent service interface                      T-
                                                                                   CNP                                                       PIP Component CNP
                                                                                            BSI transparent service interface
                                                                                   CNP                                                       PIP      I-     CNP
                                                                                             BSI (bundled) service interface                       Component
                                                                                   CBP                                                       PIP             CNP
                                                                                             BSI (bundled) service interface
                                                                                   CBP                                                      CBP       B-     PNP
                                                                                            BSI transparent service interface                      Component
                                                                                   CNP                                                      CBP              PNP
                                                                                                                                                                                     29
            PTN Summary

An Ethernet based PTN requires the development
of a PTN Network Port (PTNP), which supports 2-
stage VLAN multiplexing and transport specific
Ethernet features
A stackable VLAN Tag is required to support the
single and multi-domain ETH VC/VP/VS (VLAN)
hierarchy




                                                  30
Annex




        31
    Transport network specific
        Ethernet features

Alarm suppression            Number of FIDs is
Additional Y.1731, G.8021,   equipment specific and not
G.8031, G.8032 Ethernet      limited to 4094 (as
OAM frames                   specified in 8.8.8/802.1Q);
G.8031 VLAN linear           e.g. could also be 16k,
protection (ETH SNC          32k, 64k, 128k,...
protection)                  VLAN connection
G.8032 VLAN ring             management with network
protection                   management or GMPLS
                             control plane
VLAN IDs have a link local
                                without spanning tree
scope and VID Translation       protocol (MSTP) and
is used to map the local        without VLAN registration
VID on each link onto the       protocol (MVRP)
Relay VID inside a node

                                                            32

								
To top