RFC 5880, "Bidirectional Forwarding Detection (BFD)", June 2010

Errata ID: 2530
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Mach Chen
Date Reported: 2010-09-24
Verifier Name: Adrian Farrel
Date Verified: 2010-09-26

Section 4.3 says:

Sequence Number

      The sequence number for this packet.  For Keyed MD5
      Authentication, this value is incremented occasionally.  For
      Meticulous Keyed MD5 Authentication, this value is incremented for
      each successive packet transmitted for a session.  This provides
      protection against replay attacks.

It should say:

Sequence Number

      The sequence number for this packet.  For Keyed MD5
      Authentication, this value is incremented (by one) occasionally.  For
      Meticulous Keyed MD5 Authentication, this value is incremented by one for
      each successive packet transmitted for a session.  This provides
      protection against replay attacks.

Notes:

This change clarifies the amount by which the sequence number is incremented.

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