RFC 9465

PIM Null-Register Packing, September 2023

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V. Kamath
R. Chokkanathapuram Sundaram
R. Banthia
A. Gopal
pim (rtg)

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DOI:  https://doi.org/10.17487/RFC9465

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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".

For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.

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