PIM Assert Message Packing

Document Type Expired Internet-Draft (pim WG)
Last updated 2020-09-18 (latest revision 2020-03-17)
Replaces draft-liu-pim-assert-packing
Stream IETF
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


In PIM-SM shared LAN networks, there is typically more than one upstream router. When duplicate data packets appear on the LAN from different routers, assert packets are sent from these routers to elect a single forwarder. The PIM assert packets are sent periodically to keep the assert state. The PIM assert packet carries information about a single multicast source and group, along with the metric-preference and metric of the route towards the source or RP. This document defines a standard to send and receive multiple multicast source and group information in a single PIM assert packet in a shared network. This can be particularly helpful when there is traffic for a large number of multicast groups.


Yisong Liu (liuyisong@chinamobile.com)
Mike McBride (michael.mcbride@futurewei.com)
Toerless Eckert (tte+ietf@cs.fau.de)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)