Internet Engineering Task Force (IETF) Y. Cai
Request for Comments: 6516 E. Rosen, Ed.
Category: Standards Track IJ. Wijnands
ISSN: 2070-1721 Cisco Systems
February 2012
IPv6 Multicast VPN (MVPN) Support Using PIM Control Plane
and Selective Provider Multicast Service Interface (S-PMSI)
Join Messages
Abstract
The specification for Multicast Virtual Private Networks (MVPNs)
contains an option that allows the use of PIM as the control protocol
between provider edge routers. It also contains an option that
allows UDP-based messages, known as Selective Provider Multicast
Service Interface (S-PMSI) Join messages, to be used to bind
particular customer multicast flows to particular tunnels through a
service provider's network. This document extends the MVPN
specification (RFC 6513) so that these options can be used when the
customer multicast flows are IPv6 flows.
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/rfc6516.
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
Cai, et al. Standards Track [Page 1]RFC 6516 IPv6 MVPN Support February 2012
to this document. Code Components extracted from this document must
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described in the Simplified BSD License.
Table of Contents
1. Introduction ....................................................2
2. Specification of Requirements ...................................3
3. S-PMSI Joins Binding IPv6 Flows to GRE/IPv4 P-Tunnels ...........3
3.1. Encoding ...................................................3
3.2. Encapsulation of S-PMSI Joins in UDP Datagrams .............4
4. PE-PE PIM/IPv6 over an IPv4 P-Tunnel ............................4
5. IANA Considerations .............................................5
6. Security Considerations .........................................5
7. Acknowledgments .................................................5
8. Normative References ............................................5
1. Introduction
The Multicast Virtual Private Network (MVPN) specification [RFC6513]
defines the notion of a "PMSI" (Provider Multicast Service Interface)
and specifies how a PMSI can be instantiated by various kinds of
tunnels through a service provider's network ("P-tunnels"). It also
specifies the procedures for using PIM (Protocol Independent
Multicast [RFC4601]) as the control protocol between Provider Edge
(PE) routers. When PIM is used as the control protocol, PIM messages
are sent through a P-tunnel from one PE in an MVPN to others in the
same MVPN. These PIM messages carry customer multicast routing
information. However, [RFC6513] does not cover the case where the
customer is using IPv6, but the service provider is using P-tunnels
created by PIM over an IPv4 infrastructure.
The MVPN specification [RFC6513] also specifies "S-PMSI (Selective
PMSI) Join" messages, which are optionally used to bind particular
customer multicast flows to particular P-tunnels. However, the
specification does not cover the case where the customer flows are
IPv6 flows.
This document extends [RFC6513] by adding the specification for
handling customer IPv6 multicast flows when a service provider is
using PE-PE PIM and/or S-PMSI Join messages over an IPv4
infrastructure. This document also specifies how to send multiple
S-PMSI Join messages in a single UDP datagram.
This document uses terminology defined in [RFC6513]: C-source,
datatracker.ietf.org