Bidirectional Protocol Independent Multicast
RFC 5015, “Bidirectional Protocol Independent Multicast”, is a Proposed Standard document published in October 2007 by M. Handley, I. Kouvelas, T. Speakman, L. Vicisano. It has since been updated by RFC 8736, RFC 9436. The canonical text is published by the RFC Editor.
Abstract
This document discusses Bidirectional PIM (BIDIR-PIM), a variant of PIM Sparse-Mode that builds bidirectional shared trees connecting multicast sources and receivers. Bidirectional trees are built using a fail-safe Designated Forwarder (DF) election mechanism operating on each link of a multicast topology. With the assistance of the DF, multicast data is natively forwarded from sources to the Rendezvous-Point (RP) and hence along the shared tree to receivers without requiring source-specific state. The DF election takes place at RP discovery time and provides the route to the RP, thus eliminating the requirement for data-driven protocol events. [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 5015 is hosted at rfc-editor.org. Available in TXT,HTML.
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