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Using SSRC with WebRTC Simulcast

Document Type Expired Internet-Draft (individual)
Expired & archived
Author Harald T. Alvestrand
Last updated 2020-01-07 (Latest revision 2019-07-06)
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This document describes a convention for sending "a=ssrc" attributes in SDP together with "a=simulcast" attributes. This allows SFUs that need SSRC information to have this info easily accessible. Given that it is intended as an interim measure, it does not aim for being published as an RFC.


Harald T. Alvestrand

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