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. This internet-draft specifies a RTP Control Protocol (RTCP) Extended Report (XR) Block for data on jitter buffer configuration and performance. The security considerations section does exist and states that the new block data does not introduce any additional security concerns than those stated in the base XR spec, RFC 3611. I believe this to be an accurate assertion. General comments: I found the draft slightly hard to read, as the terminology and abbreviations used are not expanded. For example, the abstract has "RTP", but never expands the abbreviation. Editorial comments: s/[RFC6390]and/[RFC6390] and/ Shawn. --