RFC 4552, "Authentication/Confidentiality for OSPFv3", June 2006Source of RFC: ospf (rtg)
Errata ID: 2599
Reported By: John W. O'Brien
Date Reported: 2010-11-02
Rejected by: Stewart Bryant
Date Rejected: 2013-05-06
Section 3 says:
In order to provide authentication to OSPFv3, implementations MUST support ESP and MAY support AH.
It should say:
In order to provide authentication to OSPFv3, implementations MUST support AH and MAY support ESP.
Authentication can be provided by an implementation that supports AH only.
This was discussed on the OSPF list: http://www.ietf.org/mail-archive/web/ospf/current/msg05827.html and the conclusion was that the errata should be rejected.