Dear all, 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 primarily for the benefit of the operational area directors. Document editors and WG chairs should treat these comments just like any other last call comments. Intended status: Standards Track Summary: I found it is well written with no big concerns. The document is ready to be published. A minor comment lists below. Section 3.2 describes three scenarios. It also states "in each of the situations described above, both provisioning models are applicable. But, the description in 3.2.1 and 3.2.2 does not cover all three scenarios. It may leave some questions on the operational procedures of these undescribed scenarios. My guess is they are same or similar. Some clarification on this would be helpful. Best regards, Sheng