Hi, I have reviewed this document as part of the Operational directorate's  ongoing effort to review all IETF documents being processed by the IESG.  These  comments were written with the intent of improving the operational aspects of the  IETF drafts. Comments that are not addressed in last call may be included in AD reviews  during the IESG review.  Document editors and WG chairs should treat these comments  just like any other last call comments.  I believe this draft is on the IESG telechat agenda for tomorrow. There have been  a minor update from -13 to -14 in the last couple of days to clarify the RFCs that  the draft updates, which now seems resolved between the advice from the two  ADs in question. My view is that the document is Ready. Very minor nits: The last sentence of section 1 is a little clumsy, and perhaps unnecessary: " The Cha nges to RFC 4861 section includes an update to RFC 4861." The first paragraph in the Problem Statement could be broken into two or three. Tim