I have reviewed this document as part of the security directorate's ongoing effort to review all IETF documents being processed by the IESG.  These comments were written primarily for the benefit of the security area directors.  Document editors and WG chairs should treat these comments just like any other last call comments. The document describes a fix to the allocation of DHCPv4 and DHCPv6 Options for Access Network Discovery which appears to be entirely determined by the needs of backwards compatibility. I found no security issues problems or comments. -- Website: http://hallambaker.com/