Application of Ethernet Pseudowires to MPLS Transport Networks
RFC 5994

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Internet Engineering Task Force (IETF)                    S. Bryant, Ed.
Request for Comments: 5994                                     M. Morrow
Category: Informational                                       G. Swallow
ISSN: 2070-1721                                            Cisco Systems
                                                            R. Cherukuri
                                                        Juniper Networks
                                                               T. Nadeau
                                                     Huawei Technologies
                                                             N. Harrison
                                                                      BT
                                                        B. Niven-Jenkins
                                                                 Velocix
                                                            October 2010

     Application of Ethernet Pseudowires to MPLS Transport Networks

Abstract

   Ethernet pseudowires are widely deployed to support packet transport
   of Ethernet services.  These services in-turn provide transport for a
   variety of client networks, e.g., IP and MPLS.  This document uses
   procedures defined in the existing IETF specifications of Ethernet
   pseudowires carried over MPLS networks.

   Many of the requirements for the services provided by the mechanisms
   explained in this document are also recognized by the MPLS transport
   profile (MPLS-TP) design effort formed jointly by the IETF and ITU-T.
   The solution described here does not address all of the MPLS-TP
   requirements, but it provides a viable form of packet transport
   service using tools that are already available.

   This document also serves as an indication that existing MPLS
   techniques form an appropriate basis for the design of a fully-
   featured packet transport solution addressing all of the requirements
   of MPLS-TP.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   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).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see Section 2 of RFC 5741.

Bryant, et al.                Informational                     [Page 1]
RFC 5994             Eth PWs to MPLS Transport Ntwks        October 2010

   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/rfc5994.

Copyright Notice

   Copyright (c) 2010 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   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
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   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 . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Requirements Language  . . . . . . . . . . . . . . . . . .  5
   2.  PWE3 Configuration . . . . . . . . . . . . . . . . . . . . . .  5
   3.  Operations, Administration, and Maintenance (OAM)  . . . . . .  5
     3.1.  VCCV Profile 1: BFD without IP/UDP Headers . . . . . . . .  6
     3.2.  VCCV Profile 2: BFD with IP/UDP Headers  . . . . . . . . .  6
   4.  MPLS Layer . . . . . . . . . . . . . . . . . . . . . . . . . .  6
     4.1.  External Configuration . . . . . . . . . . . . . . . . . .  6
     4.2.  Control Plane Configuration  . . . . . . . . . . . . . . .  7
   5.  Congestion Considerations  . . . . . . . . . . . . . . . . . .  8
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . .  8