Ballot for draft-ietf-mmusic-mux-exclusive
Yes
No Objection
Note: This ballot was opened for revision 09 and is now closed.
In Section 3: The mux category [I-D.ietf-mmusic-sdp-mux-attributes] for the 'rtcp- mux-only' attribute is 'IDENTICAL', which means that the attribute, if used within a BUNDLE group [I-D.ietf-mmusic-sdp-bundle-negotiation], must be associated with all multiplexed RTP-based media descriptions within the BUNDLE group. This sounds pretty normative, so I think the following 2 references should be Normative: [I-D.ietf-mmusic-sdp-mux-attributes] Nandakumar, S., "A Framework for SDP Attributes when Multiplexing", draft-ietf-mmusic-sdp-mux-attributes-12 (work in progress), January 2016. [I-D.ietf-mmusic-sdp-bundle-negotiation] Holmberg, C., Alvestrand, H., and C. Jennings, "Negotiating Media Multiplexing Using the Session Description Protocol (SDP)", draft-ietf-mmusic-sdp-bundle- negotiation-31 (work in progress), June 2016.
Tim Wicinski <tjw.ietf@gmail.com> performed the opsdir review.
Quick question: My initial understanding was that newer systems usually support RTP/RTCP multiplexing, while older systems that do not support RTP/RTCP multiplexing will also not be able to understand this new attribut. So I guess that's not the use case. That means the use case if for newer system that do know about RTP/RTCP multiplexing as well as the 'rtcp-mux-only' attribute but don't support it for some reason. What are these reasons? Maybe you can provide some more background about the intended usage here! Minor: Some sentences are a little hard to pharse as they are quite long, e.g. OLD: "When an offerer sends the initial offer, if the offerer wants to indicate exclusive RTP/RTCP multiplexing for RTP-based media, the offerer MUST associate an SDP 'rtcp-mux-only' attribute with the associated SDP media description ("m=" line)." MAYBE: "If the offerer wants to indicate exclusive RTP/RTCP multiplexing for RTP-based media, the offerer MUST send the initial offer with an associated SDP 'rtcp-mux-only' attribute and the associated SDP media description ("m=" line)."