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

Errata ID: 1156
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

Section 4.5.2 says:

  If the upstream neighbor address
   field is not correct, these state transitions in this state machine
   must not occur, although seeing such a packet may cause state
   transitions in other state machines.

It should say:

  If the upstream neighbor address
   field is not correct, these state transitions in this state machine
   MUST NOT occur, although seeing such a packet MAY cause state
   transitions in other state machines.

Notes:

RFC 2119 keywords are not capitalized.

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