Multicast in Virtual Private LAN Service (VPLS)
RFC 7117

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Internet Engineering Task Force (IETF)                  R. Aggarwal, Ed.
Request for Comments: 7117                              Juniper Networks
Category: Standards Track                                      Y. Kamite
ISSN: 2070-1721                                       NTT Communications
                                                                 L. Fang
                                                               Microsoft
                                                              Y. Rekhter
                                                        Juniper Networks
                                                           C. Kodeboniya
                                                           February 2014

            Multicast in Virtual Private LAN Service (VPLS)

Abstract

   RFCs 4761 and 4762 describe a solution for Virtual Private LAN
   Service (VPLS) multicast that relies on the use of point-to-point or
   multipoint-to-point unicast Label Switched Paths (LSPs) for carrying
   multicast traffic.  This solution has certain limitations for certain
   VPLS multicast traffic profiles.  For example, it may result in
   highly non-optimal bandwidth utilization when a large amount of
   multicast traffic is to be transported.

   This document describes solutions for overcoming a subset of the
   limitations of the existing VPLS multicast solution.  It describes
   procedures for VPLS multicast that utilize multicast trees in the
   service provider (SP) network.  The solution described in this
   document allows sharing of one such multicast tree among multiple
   VPLS instances.  Furthermore, the solution described in this document
   allows a single multicast tree in the SP network to carry traffic
   belonging only to a specified set of one or more IP multicast streams
   from one or more VPLS instances.

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/rfc7117.

Aggarwal, et al.             Standards Track                    [Page 1]
RFC 7117                    Multicast in VPLS              February 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.

Aggarwal, et al.             Standards Track                    [Page 2]
RFC 7117                    Multicast in VPLS              February 2014

Table of Contents

   1. Introduction ....................................................4
   2. Terminology .....................................................5
      2.1. Specification of Requirements ..............................6
   3. Overview ........................................................6
      3.1. Inclusive and Selective Multicast Trees ....................7
      3.2. BGP-Based VPLS Membership Auto-discovery ...................8
      3.3. IP Multicast Group Membership Discovery ....................8
      3.4. Advertising P-Multicast Tree to VPLS/C-Multicast Binding ...9
      3.5. Aggregation ...............................................10
      3.6. Inter-AS VPLS Multicast ...................................11
   4. Intra-AS Inclusive P-Multicast Tree Auto-discovery/Binding .....12