I am the assigned Gen-ART reviewer for this draft. For background on Gen-ART, please see the FAQ at < http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq>. Please wait for direction from your document shepherd or AD before posting a new version of the draft. Document: draft-ietf-avtcore-clksrc-09 Reviewer: Scott Brim Review Date: 2014-02-03 IETF LC End Date: 2014-01-16 IESG Telechat date: 2014-02-06 Summary: Ready with a minor issue Major issues: none Minor issues: This is the same version I reviewed at LC. After discussion with the authors I have changed my question to a recommendation. In 6.1.2 and 6.1.3 it says: "If the answerer rejects the offer because the available reference clocks are incompatible, the rejection MUST contain at least one timestamp reference clock specification usable by the answerer." I have learned that sending this reference clock specification is not required for the protocol to function. It is for the offerer's information, so that maybe next time the negotiation will succeed. - Since including the reference clock is not required for the protocol per se to work, consider making this MUST a SHOULD. - In any case, this needs to be justified. Even something as simple as adding "for the offerer's information" could be sufficient, although usually more would be expected. Scott