Multicast Virtual Private Network : Using Bidirectional P-Tunnels
RFC 7582, “Multicast Virtual Private Network : Using Bidirectional P-Tunnels”, is a Proposed Standard document published in July 2015 by E. Rosen, IJ. Wijnands, Y. Cai, A. Boers. It updates RFC 6513, RFC 6514, RFC 6625. It has since been updated by RFC 8534, RFC 9573. The canonical text is published by the RFC Editor.
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.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 7582 is hosted at rfc-editor.org. Available in TXT,HTML.
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