Reviewer: Carlos Pignataro Review result: Has Nits This is a very well written and detailed document. I have only one concern, which I believe should be addressed before moving this document forward: I found the rational and specific details on what this document "Updates" from three previous RFCs to be lacking, and confusing. I recommend an "Updates from RFC XYZ" section in which there is a textual explanation and ideally Old/New specifics on how this document updates previous RFCs. At least, something more inline with current thinking as per https://www.ietf.org/mail-archive/web/ietf/current/msg109106.html Thanks, Carlos Pignataro.