PIM Null-Register Packing
RFC 9465, “PIM Null-Register Packing”, is a Proposed Standard document published in September 2023 by V. Kamath, R. Chokkanathapuram Sundaram, R. Banthia, A. Gopal. The canonical text is published by the RFC Editor.
Abstract
In PIM Sparse Mode (PIM-SM) networks, PIM Null-Register messages are sent by the Designated Router (DR) to the Rendezvous Point (RP) to signal the presence of multicast sources in the network. There are periodic PIM Null-Registers sent from the DR to the RP to keep the state alive at the RP as long as the source is active. The PIM Null-Register message carries information about a single multicast source and group.
This document defines a standard to send information about multiple multicast sources and groups in a single PIM message. This document refers to the new messages as the "PIM Packed Null-Register message" and "PIM Packed Register-Stop message".
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 9465 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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