Negotiating Media Multiplexing Using the Session Description Protocol (SDP)

Document Type Replaced Internet-Draft (individual)
Authors Christer Holmberg  , Harald Alvestrand  , Cullen Jennings 
Last updated 2021-03-31
Replaced by draft-ietf-mmusic-rfc8843bis
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This specification defines a new Session Description Protocol (SDP) Grouping Framework extension called 'BUNDLE'. The extension can be used with the SDP offer/answer mechanism to negotiate the usage of a single transport (5-tuple) for sending and receiving media described by multiple SDP media descriptions ("m=" sections). Such transport is referred to as a BUNDLE transport, and the media is referred to as bundled media. The "m=" sections that use the BUNDLE transport form a BUNDLE group. This specification defines a new RTP Control Protocol (RTCP) Source Description (SDES) item and a new RTP header extension. This specification updates RFCs 3264, 5888, and 7941. This specification obsoletes RFC 8843.


Christer Holmberg (
Harald Alvestrand (
Cullen Jennings (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)