SDP Media Capabilities Negotiation
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SDP Media Capabilities Negotiation draft-ietf-mmusic-sdp-media-capabilities-13 R. Gilman, R. Even, F. Andreasen. IETF 83, Paris March 26, 2012 Flemming Andreasen ([email protected]). Changes in -13. Got rid of “dummy” ( “*” ) pcfg payload-type-number in Potential Configurations (pcfg)

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SDP Media Capabilities Negotiationdraft-ietf-mmusic-sdp-media-capabilities-13R. Gilman, R. Even, F. Andreasen

IETF 83, Paris

March 26, 2012

Flemming Andreasen ([email protected])


Changes in 13
Changes in -13

  • Got rid of “dummy” (“*”) pcfg payload-type-number in Potential Configurations (pcfg)

    • Was originally provided to accommodate media formats that ignore the actual media format values provided in the “m=“ line (such as BFCP)

    • With the -12 split of media capabilities into “RTP” and “non-RTP”, the dummy value is no longer needed.

      • (Non-RTP does not have payload type mappings)


Changes in 131
Changes in -13

  • Significantly expanded on Offer/Answer Procedures

    • Would appreciate review

  • Updated Security Considerations


Sdp media bundle interactions
“SDP Media Bundle” Interactions ?

  • Jonathan Lennox asked about interactions with SDP media bundles at IETF 82

    • Currently draft-ietf-mmusic-sdp-bundle-negotiation-00.txt

  • Media Capabilities mechanism works, but inter-media description synchronization of negotiated configuration may be needed

    • This is however a more general SDP media bundle issue (transports, attributes, capability negotiation in general, etc.)


Next steps
Next Steps

  • All known open issues have been addressed at this point

    • Essentially ready for WGLC, however would appreciate volunteer review of Offer/Answer section first


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