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Multicast Virtual Private Network (MVPN): Using Bidirectional P-Tunnels (RFC7582)

IP.com Disclosure Number: IPCOM000242447D
Original Publication Date: 2015-Jul-01
Included in the Prior Art Database: 2015-Jul-15
Document File: 68 page(s) / 79K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

E. Rosen: AUTHOR [+4]

Abstract

The RFCs that specify multicast support for BGP/MPLS IP VPNs ([RFC6513], [RFC6514], and [RFC6625]) allow customer multicast data to be transported across a service provider's network though a set of multicast tunnels. These tunnels are advertised in BGP multicast auto-discovery (A-D) routes, by means of a BGP attribute known as the "Provider Multicast Service Interface (PMSI) Tunnel" attribute. The base specifications allow the use of bidirectional (multipoint-to- multipoint) multicast distribution trees and describe how to encode the identifiers for bidirectional trees into the PMSI Tunnel attribute. However, those specifications do not provide all the necessary detailed procedures for using bidirectional tunnels; the full specification of these procedures was considered to be outside the scope of those documents. The purpose of this document is to provide all the necessary procedures for using bidirectional trees in a service provider's network to carry the multicast data of VPN customers.

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Internet Engineering Task Force (IETF)                          E. Rosen Request for Comments: 7582                        Juniper Networks, Inc. Updates: 6513, 6514, 6625                                   IJ. Wijnands Category: Standards Track                            Cisco Systems, Inc. ISSN: 2070-1721                                                   Y. Cai                                                                Microsoft                                                                 A. Boers                                                                July 2015

                Multicast Virtual Private Network (MVPN):                      Using Bidirectional P-Tunnels

Abstract

   A set of prior RFCs specify procedures for supporting multicast in

   BGP/MPLS IP VPNs.  These procedures allow customer multicast data to

   travel across a service provider's backbone network through a set of

   multicast tunnels.  The tunnels are advertised in certain BGP

   multicast auto-discovery routes, by means of a BGP attribute known

   as the "Provider Multicast Service Interface (PMSI) Tunnel"

   attribute.  Encodings have been defined that allow the PMSI Tunnel

   attribute to identify bidirectional (multipoint-to-multipoint)

   multicast distribution trees.  However, the prior RFCs do not provide

   all the necessary procedures for using bidirectional tunnels to

   support multicast VPNs.  This document updates RFCs 6513, 6514, and

   6625 by specifying those procedures.  In particular, it specifies the

   procedures for assigning customer multicast flows (unidirectional or

   bidirectional) to specific bidirectional tunnels in the provider

   backbone, for advertising such assignments, and for determining which

   flows have been assigned to which tunnels.

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/rfc7582.

Rosen, et al.                Standards Track                    [Page 1]
 RFC 7582           MVPN: Using Bidirectional P-...