[Cake] Fwd: [Dart] RFC 7657 on Differentiated Services (Diffserv) and Real-Time Communication

Dave Taht dave.taht at gmail.com
Thu Nov 19 03:52:49 EST 2015

My head hurts.

---------- Forwarded message ----------
From:  <rfc-editor at rfc-editor.org>
Date: Thu, Nov 19, 2015 at 2:11 AM
Subject: [Dart] RFC 7657 on Differentiated Services (Diffserv) and
Real-Time Communication
To: ietf-announce at ietf.org, rfc-dist at rfc-editor.org
Cc: drafts-update-ref at iana.org, dart at ietf.org, rfc-editor at rfc-editor.org

A new Request for Comments is now available in online RFC libraries.

        RFC 7657

        Title:      Differentiated Services (Diffserv) and Real-Time
        Author:     D. Black, Ed.,
                    P. Jones
        Status:     Informational
        Stream:     IETF
        Date:       November 2015
        Mailbox:    david.black at emc.com,
                    paulej at packetizer.com
        Pages:      26
        Characters: 67721
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-dart-dscp-rtp-10.txt

        URL:        https://www.rfc-editor.org/info/rfc7657

        DOI:        http://dx.doi.org/10.17487/RFC7657

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 Codepoints (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 have transport protocol interactions, particularly
with congestion control functionality (e.g., reordering).  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

This document is a product of the DiffServ Applied to Real-time
Transports Working Group of the IETF.

INFORMATIONAL: This memo provides information for the Internet community.
It does not specify an Internet standard of any kind. Distribution of
this memo is unlimited.

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