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

Martin Thomson <> Wed, 30 July 2014 17:12 UTC

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Date: Wed, 30 Jul 2014 10:12:11 -0700
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From: Martin Thomson <>
To: Jonathan Lennox <>
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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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(Completing the move)

On 30 July 2014 08:10, Jonathan Lennox <> wrote:
> This is equivalent to using regular nomination, but saying that an endpoint can send media on any Confirmed candidate pair, not just the Selected one, right?

I like this idea.  I don't know what this does to other
implementations, but Firefox would probably be OK with that based on
my quick check of the code.

The only caveat on that is that we need to have a remote candidate for
the flow before it gets delivered.  We create candidates based on one
of three conditions, as 5245 requires: we have received a valid check
from that remote address, we have received a check response from that
remote address, or the remote address was signaled.  If we are
trickling, that could mean that valid packets get discarded for some
time.  I think that the only downside there is that the sender needs
to retransmit their DTLS handshake packets.

That approach more or less renders aggressive nomination pointless, doesn't it?