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[rtcweb] STUN DSCP and draft-ietf-tsvwg-rtcweb-qos

Matthew Kaufman <mkaufman@bluejeans.com> Wed, 31 July 2019 04:08 UTC

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From: Matthew Kaufman <mkaufman@bluejeans.com>
To: "tsvwg@ietf.org" <tsvwg@ietf.org>, "rtcweb@ietf.org" <rtcweb@ietf.org>
Thread-Topic: STUN DSCP and draft-ietf-tsvwg-rtcweb-qos
Thread-Index: AQHVR1Wk05FT/JEWvEyZjv/Ejg3eBA==
Date: Wed, 31 Jul 2019 04:08:43 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtcweb/6c2ajVItER8mXrwiQpFAnvqu_SE>
Subject: [rtcweb] STUN DSCP and draft-ietf-tsvwg-rtcweb-qos
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Was chasing down some webrtc rabbit holes today, and came across the following concern:

draft-ietf-tsvwg-rtcweb-qos has exactly zero language about how the STUN packets should be marked for ICE negotiation. The issue is mentioned in draft-ietf-rtcweb-stun-consent-freshness, but I believe that the rtcweb-qos document should be the reference to how an rtcweb transport author should be setting DiffServ markings.

Also, there was a great conversation on the topic back in 2014 that unfortunately seems to have petered out before a resolution to some obvious open issues: https://mailarchive.ietf.org/arch/browse/rtcweb/?gbt=1&index=HH0qztqt4UtfZdpuxHTVcg7hZdE

Would be great to finish the conversation before finalizing the specification for how to mark these.

Personally I’m in the “ICE is testing connectivity, so STUN must be marked exactly the same as corresponding media” camp.

Matthew Kaufman

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