Re: [rtcweb] DSCP marking for STUN packets

Justin Uberti <juberti@google.com> Mon, 10 March 2014 05:16 UTC

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From: Justin Uberti <juberti@google.com>
Date: Mon, 10 Mar 2014 05:16:23 +0000
Message-ID: <CAOJ7v-2jnBAPEhkxjgRtNyntWPL6KBB-PQSLkUPUu91QHoPr3g@mail.gmail.com>
To: "Muthu Arul Mozhi Perumal (mperumal)" <mperumal@cisco.com>
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Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] DSCP marking for STUN packets
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I think that the existing guidance should be sufficient in non-multiplexing
cases (i.e. BUNDLE). For consent checks, I think the same DSCP markings as
any other ICE connectivity checks should be used; for ICE-for-SCTP checks,
the same DSCP markings as media packets (i.e. the SCTP traffic) should be
used.

If multiplexing is being performed, the connectivity checks probably should
use the highest DSCP value being used by the multiplexed media.


On Fri, Mar 7, 2014 at 4:35 AM, Muthu Arul Mozhi Perumal (mperumal) <
mperumal@cisco.com> wrote:

>  ICE says that an endpoint SHOULD apply the same DSCP marking as media
> packets to connectivity checks. This looks insufficient for RTCWEB, since
> it doesn't cover (at least) the following:
>
> - connectivity checks performed for a stream using different drop
> pecedences (draft-dhesikan-tsvwg-rtcweb-qos).
>
> - connectivity checks performed for non-media/data-channel traffic.
>
> - DSCP markings for consent checks.
>
>
>
> Comments on where we need to specify them? The last one can probably go
> into draft-ietf-rtcweb-stun-consent-freshness?
>
>
>
> Muthu
>
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