Skip to main content

Protocol Independent Multicast - Sparse Mode (PIM-SM): Protocol Specification (Revised)
RFC 7761 also known as STD 83

Revision differences

Document history

Date By Action
2026-05-20
(System) Changed author "L. Zheng": changed name from "Lianshu Zheng" to "L. Zheng", cleared country (was "China"), changed order from "6" to "7"
2026-05-20
(System) Changed author "Z. Zhang": changed name from "Zhaohui Zhang" to "Z. Zhang", cleared country (was "Westford, MA  01886"), changed order from "5" to "6"
2026-05-20
(System)
Changed author "R. Parekh": changed name from "Rishabh Parekh" to "R. Parekh", changed affiliation from "Cisco Systems" to "Cisco Systems, Inc.", cleared country (was "San …
Changed author "R. Parekh": changed name from "Rishabh Parekh" to "R. Parekh", changed affiliation from "Cisco Systems" to "Cisco Systems, Inc.", cleared country (was "San Jose, CA  95134"), changed order from "4" to "5"
2026-05-20
(System) Changed author "I. Kouvelas": changed name from "Isidor Kouvelas" to "I. Kouvelas", cleared country (was "Santa Clara, CA  95054"), changed order from "3" to "4"
2026-05-20
(System) Changed author "H. Holbrook": changed name from "Hugh Holbrook" to "H. Holbrook", cleared country (was "Santa Clara, CA  95054"), changed order from "2" to "3"
2026-05-20
(System) Changed author "M. Handley": changed name from "Mark Handley" to "M. Handley", cleared country (was "United Kingdom"), changed order from "1" to "2"
2026-05-20
(System) Changed author "B. Fenner": changed name from "Bill Fenner" to "B. Fenner", changed order from "0" to "1"
2026-05-20
(System) Metadata update from RFC Editor
2023-12-12
(System) Imported membership of rfc7761 in std83 via sync to the rfc-index
2023-12-12
(System) No history of STD83 is currently available in the datatracker before this point
2020-01-21
(System) Received changes through RFC Editor sync (added Verified Errata tag)
2018-12-20
(System)
Received changes through RFC Editor sync (changed abstract to 'This document specifies Protocol Independent Multicast - Sparse Mode (PIM-SM). PIM-SM is a multicast routing protocol …
Received changes through RFC Editor sync (changed abstract to 'This document specifies Protocol Independent Multicast - Sparse Mode (PIM-SM). PIM-SM is a multicast routing protocol that can use the underlying unicast routing information base or a separate multicast-capable routing information base. It builds unidirectional shared trees rooted at a Rendezvous Point (RP) per group, and it optionally creates shortest-path trees per source.

This document obsoletes RFC 4601 by replacing it, addresses the errata filed against it, removes the optional (*,*,RP), PIM Multicast Border Router features and authentication using IPsec that lack sufficient deployment experience (see Appendix A), and moves the PIM specification to Internet Standard.')
2018-05-01
(System) Received changes through RFC Editor sync (added Errata tag)
2016-06-07
(System) IANA registries were updated to include RFC7761
2016-03-11
(System) RFC published