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RFC 4601, "Protocol Independent Multicast - Sparse Mode (PIM-SM): Protocol Specification (Revised)", August 2006

Note: This RFC has been obsoleted by RFC 7761

Note: This RFC has been updated by RFC 5059, RFC 5796, RFC 6226

Source of RFC: pim (rtg)

Errata ID: 1135
Status: Held for Document Update
Type: Technical
Publication Format(s) : TEXT

Reported By: Maren Peasley
Date Reported: 2007-12-21
Held for Document Update by: David Ward
Date Held: 2009-03-22

Sections 6.4 and A.2

   The rationale for this is that there is no way in PIM-SM to prune
   traffic off the (*,*,RP) tree, except by Joining the (*,G) tree and
   then pruning each source individually.


The paragraph beginning “The rationale for this…” describes a condition where a small cause can have a great effect – a (*,*,RP) join could cause state that, if it is not needed, requires a (*,G) join and many prunes for each source. This is mentioned as the last point in section 6.4, but section 6.4 fails to mention that “undoing” this state requires a join followed by multiple prunes.

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