Re: [MMUSIC] Merging ICE aggressive and regular nomination (was Re: [tram] Comment on draft-williams-peer-redirect-01: might it not converge?)

Martin Thomson <martin.thomson@gmail.com> Thu, 31 July 2014 22:28 UTC

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Date: Thu, 31 Jul 2014 15:28:16 -0700
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From: Martin Thomson <martin.thomson@gmail.com>
To: =?UTF-8?Q?I=C3=B1aki_Baz_Castillo?= <ibc@aliax.net>
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Cc: Jonathan Lennox <jonathan@vidyo.com>, mmusic <mmusic@ietf.org>
Subject: Re: [MMUSIC] Merging ICE aggressive and regular nomination (was Re: [tram] Comment on draft-williams-peer-redirect-01: might it not converge?)
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On 31 July 2014 15:17, Iñaki Baz Castillo <ibc@aliax.net> wrote:
> Yes, RFC 5245 allows media coming on non-nominated pair. But note that
> RFC 5245 knows nothing about DTLS. I strongly expect that RFC 5245
> would not allow that in case of DTLS-SRTP given that allowing DTLS
> coming from "any" source address adds too much complexity.


I disagree.  I think that the general idea that the flow endpoints
might change is inherent in ICE.

There is obviously a point at which it is expedient for a range of
reasons to nail things down to a single pair of addresses.  That
includes cleanup and some SDP interactions, along with some fun
middlebox issues.  So we have an ICE process that completes, but ICE
doesn't actually *need* to complete.  It's primary goal is to find
some way to get the packets through.