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. Status of the document: Ready I found the document well written, and it's tone/way it read was well done. Congrats to the authors. I was surprised to see a Vendor implementation called out by name in Section 1 (Microsoft) - not a big deal, just a bit surprised, but overall, I'm pleased to see us mitigating open issues. Thanks Sarah