Dynamic Placement of Multi-Segment Pseudowires
draft-ietf-pwe3-dynamic-ms-pw-19

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Document Type Active Internet-Draft (pwe3 WG)
Last updated 2013-11-27 (latest revision 2013-10-09)
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Stream WG state Submitted to IESG for Publication Aug 2012
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Document shepherd Loa Andersson
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Network Working Group                                 Luca Martini (Ed.)
Internet Draft                                        Cisco Systems Inc.
Expires: April 2014
Intended status: Standards Track                     Matthew Bocci (Ed.)
Updates: 6073                                         Florin Balus (Ed.)
                                                          Alcatel-Lucent

                                                         October 8, 2013

             Dynamic Placement of Multi-Segment Pseudowires

                  draft-ietf-pwe3-dynamic-ms-pw-19.txt

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
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Abstract

   There is a requirement for service providers to be able to extend the
   reach of pseudowires (PW) across multiple Packet Switched Network
   domains. A Multi-Segment PW is defined as a set of two or more
   contiguous PW segments that behave and function as a single point-
   to-point PW. This document describes extensions to the PW control
   protocol to dynamically place the segments of the multi-segment
   pseudowire among a set of Provider Edge (PE) routers. This document
   also updates RFC6073 as follows: it updates the length value of the

Martini, et al.                                                 [Page 1]
Internet Draft    draft-ietf-pwe3-dynamic-ms-pw-19.txt   October 8, 2013

   PW Switching Point PE Sub-TLV Type 0x06 to 14.

Table of Contents

    1        Introduction  .........................................   3
    1.1      Scope  ................................................   3
    1.2      Specification of Requirements  ........................   3
    1.3      Terminology  ..........................................   3
    1.4      Architecture Overview  ................................   4
    2        Applicability  ........................................   5
    2.1      Changes to Existing PW Signaling  .....................   5
    3        PW Layer 2 Addressing  ................................   5
    3.1      Attachment Circuit Addressing  ........................   6
    3.2      S-PE Addressing  ......................................   7
    4        Dynamic Placement of MS-PWs  ..........................   7
    4.1      Pseudowire Routing Procedures  ........................   7
    4.1.1    AII PW Routing Table Lookup Aggregation Rules  ........   8
    4.1.2    PW Static Route  ......................................   8
    4.1.3    Dynamic Advertisement with BGP  .......................   9
    4.2      LDP Signaling  ........................................  10
    4.2.1    Equal Cost Multi Path (ECMP) in PW Routing  ...........  12
    4.2.2    Active/Passive T-PE Election Procedure  ...............  12
    4.2.3    Detailed Signaling Procedures  ........................  13
    5        Failure Handling Procedures  ..........................  14
    5.1      PSN Failures  .........................................  14
    5.2      S-PE Specific Failures  ...............................  14
    5.3      PW Reachability Changes  ..............................  15
    6        Operations and Maintenance (OAM)  .....................  15
    7        Security Considerations  ..............................  16
    8        IANA Considerations  ..................................  16
    8.1      Corrections  ..........................................  16
    8.2      LDP TLV TYPE NAME SPACE  ..............................  16
    8.3      LDP Status Codes  .....................................  17
    8.4      BGP SAFI  .............................................  17
    9        References  ...........................................  17
    9.1      Normative References  .................................  17
    9.2      Informative References  ...............................  18
   10        Major Co-authors  .....................................  18
   11        Acknowledgements  .....................................  18
   12        Author's Addresses  ...................................  19
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