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Re: [rtcweb] JSEP and ice-pacing attribute

Justin Uberti <juberti@google.com> Wed, 31 July 2019 04:36 UTC

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From: Justin Uberti <juberti@google.com>
Date: Tue, 30 Jul 2019 21:36:13 -0700
Message-ID: <CAOJ7v-3p9rc-qp1uy2qW5XxCtB8LDcGSdP4CHceX2NgRFb9YhA@mail.gmail.com>
To: Harald Alvestrand <harald@alvestrand.no>
Cc: RTCWeb IETF <rtcweb@ietf.org>
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Subject: Re: [rtcweb] JSEP and ice-pacing attribute
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Right, I don't think JSEP has much to say on the matter here - the pacing
isn't exposed as an API to the application, so default values (or ones
close to the defaults) will typically be used.

On Tue, Jul 30, 2019 at 2:56 PM Harald Alvestrand <harald@alvestrand.no>
wrote:

> Den 30.07.2019 22:08, skrev Christer Holmberg:
> > Hi,
> >
> >
> >
> > I noted that JSEP does not specify the usage of the ice-pacing
> > attribute. Is there a reason for that? It does explicitly specify how
> > all the other ICE related SDP attributes are used.
>
> I think we overlooked it.
>
> "ice-pacing" was introduced in draft-ietf-mmusic-ice-sip-sdp-03 (July
> 2014), so we can't claim it's because it's too new..... JSEP was only at
> its version -07 at that time.
>
> According to RFC 8445 section 14.2, this attribute sets the value of the
> Ta timer (or at least this is the only interpretation that I can see
> that makes sense).
>
> According to draft-ietf-mmusic-ice-sip-sdp-36, "ice-pacing" only allows
> increasing the value of Ta to a value larger than its default (50 ms)
> (while 8445 seems to indicate that a single agent can go all the way
> down to 5 ms, but not lower).
>
> I'm happy to interpret jsep's silence on the matter as "does not define
> additional rules for ice-pacing", and leave it on the list of issues to
> consider when JSEP is revised.
>
>
> >
> >
> >
> > Regards,
> >
> >
> >
> > Christer
> >
> >
> > _______________________________________________
> > rtcweb mailing list
> > rtcweb@ietf.org
> > https://www.ietf.org/mailman/listinfo/rtcweb
> >
>
> _______________________________________________
> rtcweb mailing list
> rtcweb@ietf.org
> https://www.ietf.org/mailman/listinfo/rtcweb
>

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