The Protocol Independent Multicast Join Attribute Format
RFC 5384, “The Protocol Independent Multicast Join Attribute Format”, is a Proposed Standard document published in November 2008 by A. Boers, I. Wijnands, E. Rosen. It has since been updated by RFC 7887. The canonical text is published by the RFC Editor.
Abstract
A "Protocol Independent Multicast - Sparse Mode" Join message sent by a given node identifies one or more multicast distribution trees that that node wishes to join. Each tree is identified by the combination of a multicast group address and a source address (where the source address is possibly a "wild card"). Under certain conditions it can be useful, when joining a tree, to specify additional information related to the construction of the tree. However, there has been no way to do so until now. This document describes a modification of the Join message that allows a node to associate attributes with a particular tree. The attributes are encoded in Type-Length-Value format. [STANDARDS-TRACK]
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 5384 is hosted at rfc-editor.org. Available in TXT,HTML.
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