Hello, 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. Summary: Ready to go, with comments No major issues, however, the document reads to me as if we're suggesting that operators assign unique prefixes//64s to hosts; I'm not sure that's the intention here, and a bit more text around the abstract/introduction sections would help clarify that. Also, nits isn't clean. yes, I know you probably intend to clean that up (no pun intended) but I do like to see drafts come into last call with clean nits, so there you go. :) The references to RFC2119 aren't a big deal to resolve. Thanks Sarah