BGP Encodings and Procedures for Multicast in MPLS/BGP IP VPNs
RFC 6514

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Internet Engineering Task Force (IETF)                       R. Aggarwal
Request for Comments: 6514                              Juniper Networks
Category: Standards Track                                       E. Rosen
ISSN: 2070-1721                                      Cisco Systems, Inc.
                                                                T. Morin
                                                 France Telecom - Orange
                                                              Y. Rekhter
                                                        Juniper Networks
                                                           February 2012

     BGP Encodings and Procedures for Multicast in MPLS/BGP IP VPNs

Abstract

   This document describes the BGP encodings and procedures for
   exchanging the information elements required by Multicast in MPLS/BGP
   IP VPNs, as specified in RFC 6513.

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/rfc6514.

Copyright Notice

   Copyright (c) 2012 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.

Aggarwal, et al.             Standards Track                    [Page 1]
RFC 6514         BGP Encodings and Procedures for MVPNs    February 2012

Table of Contents

   1. Introduction ....................................................4
   2. Specification of Requirements ...................................4
   3. Terminology .....................................................4
   4. MCAST-VPN NLRI ..................................................5
     4.1. Intra-AS I-PMSI A-D Route ...................................6
     4.2. Inter-AS I-PMSI A-D Route ...................................7
     4.3. S-PMSI A-D Route ............................................7
     4.4. Leaf A-D Route ..............................................8
     4.5. Source Active A-D Route .....................................9
     4.6. C-Multicast Route ..........................................10
   5. PMSI Tunnel Attribute ..........................................10
   6. Source AS Extended Community ...................................13
   7. VRF Route Import Extended Community ............................14
   8. PE Distinguisher Labels Attribute ..............................15
   9. MVPN Auto-Discovery/Binding ....................................16
     9.1. MVPN Auto-Discovery/Binding - Intra-AS Operations ..........16
       9.1.1. Originating Intra-AS I-PMSI A-D Routes .................16
       9.1.2. Receiving Intra-AS I-PMSI A-D Routes ...................19
     9.2. MVPN Auto-Discovery/Binding - Inter-AS Operations ..........20
       9.2.1. Originating Inter-AS I-PMSI A-D Routes .................22
       9.2.2. When Not to Originate Inter-AS I-PMSI A-D Routes .......23
       9.2.3. Propagating Inter-AS I-PMSI A-D Routes .................23
         9.2.3.1. Propagating Inter-AS I-PMSI A-D Routes - Overview ..23
         9.2.3.2. Inter-AS I-PMSI A-D Route Received via EBGP ........24
           9.2.3.2.1. Originating Leaf A-D Route into EBGP ...........25
         9.2.3.3. Leaf A-D Route Received via EBGP ...................26
         9.2.3.4. Inter-AS I-PMSI A-D Route Received via IBGP ........27
           9.2.3.4.1. Originating Leaf A-D Route into IBGP ...........28
         9.2.3.5. Leaf A-D Route Received via IBGP ...................29
         9.2.3.6. Optimizing Bandwidth by IP Filtering on ASBRs ......30
   10. Non-Congruent Unicast and Multicast Connectivity ..............30
   11. Exchange of C-Multicast Routing Information among PEs .........32
     11.1. Originating C-Multicast Routes by a PE ....................32
       11.1.1. Originating Routes: PIM as the C-Multicast Protocol ...32
         11.1.1.1. Originating Source Tree Join C-Multicast Route ....33
         11.1.1.2. Originating Shared Tree Join C-Multicast Route ....33
       11.1.2. Originating Routes: mLDP as the C-Multicast Protocol ..34