The IESG has received a request from the DiffServ Applied to Real-time Transports WG (dart) to consider the following document: - 'Differentiated Services (DiffServ) and Real-time Communication' <draft-ietf-dart-dscp-rtp-07.txt> as Informational RFC The IESG plans to make a decision in the next few weeks, and solicits final comments on this action. Please send substantive comments to the ietf@ietf.org mailing lists by 2014-10-14. Exceptionally, comments may be sent to iesg@ietf.org instead. In either case, please retain the beginning of the Subject line to allow automated sorting. Abstract This memo describes the interaction between Differentiated Services (DiffServ) network quality of service (QoS) functionality and real- time network communication, including communication based on the Real-time Transport Protocol (RTP). DiffServ is based on network nodes applying different forwarding treatments to packets whose IP headers are marked with different DiffServ Code Points (DSCPs). WebRTC applications, as well as some conferencing applications, have begun using the Session Description Protocol (SDP) bundle negotiation mechanism to send multiple traffic streams with different QoS requirements using the same network 5-tuple. The results of using multiple DSCPs to obtain different QoS treatments within a single network 5-tuple (e.g., reordering) have transport protocol interactions, particularly with congestion control functionality. In addition, DSCP markings may be changed or removed between the traffic source and destination. This memo covers the implications of these DiffServ aspects for real-time network communication, including WebRTC. The file can be obtained via http://datatracker.ietf.org/doc/draft-ietf-dart-dscp-rtp/ IESG discussion can be tracked via http://datatracker.ietf.org/doc/draft-ietf-dart-dscp-rtp/ballot/ No IPR declarations have been submitted directly on this I-D.
