Hello, 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. IMHO, the document is Ready. This document specifies an extension to BGP Communities. The initial RFC1997 being a bit old, it does not include any security discussion section. Therefore it is important that the present document has a detailed discussion on the topic, which is actually the case. The level of details seems appropriate. Furthermore there is a dedicated "Error handling" section which is also fine. Cheers, Vincent