Requirements and Framework for Point-to-Multipoint Pseudowires over MPLS Packet Switched Networks
RFC 7338

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Internet Engineering Task Force (IETF)                    F. Jounay, Ed.
Request for Comments: 7338                                     Orange CH
Category: Informational                                   Y. Kamite, Ed.
ISSN: 2070-1721                                       NTT Communications
                                                                G. Heron
                                                           Cisco Systems
                                                                M. Bocci
                                                          Alcatel-Lucent
                                                          September 2014

     Requirements and Framework for Point-to-Multipoint Pseudowires
                   over MPLS Packet Switched Networks

Abstract

   This document presents a set of requirements and a framework for
   providing a point-to-multipoint pseudowire (PW) over MPLS Packet
   Switched Networks.  The requirements identified in this document are
   related to architecture, signaling, and maintenance aspects of point-
   to-multipoint PW operation.  They are proposed as guidelines for the
   standardization of such mechanisms.  Among other potential
   applications, point-to-multipoint PWs can be used to optimize the
   support of multicast Layer 2 services (Virtual Private LAN Service
   and Virtual Private Multicast Service).

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.

   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/rfc7338.

Jounay, et al.                Informational                     [Page 1]
RFC 7338                  P2MP PW Requirements            September 2014

Copyright Notice

   Copyright (c) 2014 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
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   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.

Jounay, et al.                Informational                     [Page 2]
RFC 7338                  P2MP PW Requirements            September 2014

Table of Contents

   1. Introduction ....................................................3
      1.1. Problem Statement ..........................................3
      1.2. Scope of This Document .....................................4
      1.3. Conventions Used in This Document ..........................4
   2. Definitions .....................................................5
      2.1. Acronyms ...................................................5
      2.2. Terminology ................................................5
   3. P2MP PW Requirements ............................................6
      3.1. Reference Model ............................................6
      3.2. P2MP PW and Underlying Layer ...............................7
      3.3. P2MP PW Construction .......................................9
      3.4. P2MP PW Signaling Requirements ............................10
           3.4.1. P2MP PW Identifier .................................10
           3.4.2. PW Type Mismatch ...................................10
           3.4.3. Interface Parameters Sub-TLV .......................10
           3.4.4. Leaf Grafting/Pruning ..............................10