I have reviewed this document as part of the security directorate's ongoing effort to review all IETF documents being processed by the IESG. These comments were written primarily for the benefit of the security area directors. Document editors and WG chairs should treat these comments just like any other last-call comments. Summary: This draft describes the mechanism for routing policies to be automatically distributed, which is very important for adjusting and optimizing traffic. The mechanism is written very clear. Thanks to Huaimo for addressing all my questions and comments for the draft. Linda Dunbar