Segmented Pseudowire
RFC 6073

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Internet Engineering Task Force (IETF)                        L. Martini
Request for Comments: 6073                                       C. Metz
Category: Standards Track                            Cisco Systems, Inc.
ISSN: 2070-1721                                                T. Nadeau
                                                             LucidVision
                                                                M. Bocci
                                                             M. Aissaoui
                                                          Alcatel-Lucent
                                                            January 2011

                          Segmented Pseudowire

Abstract

   This document describes how to connect pseudowires (PWs) between
   different Packet Switched Network (PSN) domains or between two or
   more distinct PW control plane domains, where a control plane domain
   uses a common control plane protocol or instance of that protocol for
   a given PW.  The different PW control plane domains may belong to
   independent autonomous systems, or the PSN technology is
   heterogeneous, or a PW might need to be aggregated at a specific PSN
   point.  The PW packet data units are simply switched from one PW to
   another without changing the PW payload.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6073.

Martini, et al.              Standards Track                    [Page 1]
RFC 6073                  Segmented Pseudowire              January 2011

Copyright Notice

   Copyright (c) 2011 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Table of Contents

   1. Introduction ....................................................4
   2. Specification of Requirements ...................................5
   3. Terminology .....................................................5
   4. General Description .............................................6
   5. PW Switching and Attachment Circuit Type ........................9
   6. Applicability ...................................................9
   7. MPLS-PW to MPLS-PW Switching ...................................10
      7.1. Static Control Plane Switching ............................10
      7.2. Two LDP Control Planes Using the Same FEC Type ............11
           7.2.1. FEC 129 Active/Passive T-PE Election Procedure .....11
      7.3. LDP Using FEC 128 to LDP Using the Generalized FEC 129 ....12
      7.4. LDP SP-PE TLV .............................................12
           7.4.1. PW Switching Point PE Sub-TLVs .....................14
           7.4.2. Adaptation of Interface Parameters .................15
      7.5. Group ID ..................................................16
      7.6. PW Loop Detection .........................................16
   8. MPLS-PW to L2TPv3-PW Control Plane Switching ...................16
      8.1. Static MPLS and L2TPv3 PWs ................................17
      8.2. Static MPLS PW and Dynamic L2TPv3 PW ......................17

Martini, et al.              Standards Track                    [Page 2]
RFC 6073                  Segmented Pseudowire              January 2011