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Re: [MMUSIC] ICE-bis: pacing of ICE connectivity checks

Martin Thomson <martin.thomson@gmail.com> Fri, 18 October 2013 16:44 UTC

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Date: Fri, 18 Oct 2013 09:44:38 -0700
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From: Martin Thomson <martin.thomson@gmail.com>
To: Ari Keränen <ari.keranen@ericsson.com>
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Subject: Re: [MMUSIC] ICE-bis: pacing of ICE connectivity checks
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On 18 October 2013 07:37, Ari Keränen <ari.keranen@ericsson.com> wrote:
> So, to be "conservative enough", how about 50 ms RECOMMENDED pacing value if there's no better knowledge of the network? And if there is, scale accordingly, but not below 20ms.

I see no reason not to make this 50ms.  20ms might cross the line, but
I'll let people argue about what is safe below that.  I have done some
calculations on this and even at 20ms, it's not out of proportion.
(I'll send a pointer out when I submit the draft later today).

A good reason not to have a larger pacing timer is the effect that it
has on RTO.  For some configurations, the standard formulae lead to
ICE taking far too long to complete.

--Martin

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