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Re: [tcpm] PLPMTUD for all protocols

Joe Touch <touch@strayalpha.com> Fri, 30 March 2018 05:46 UTC

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To: Mikael Abrahamsson <swmike@swm.pp.se>
Cc: William Herrin <bill@herrin.us>, tcpm@ietf.org
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From: Joe Touch <touch@strayalpha.com>
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Date: Thu, 29 Mar 2018 22:46:14 -0700
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Subject: Re: [tcpm] PLPMTUD for all protocols
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On 3/29/2018 10:38 PM, Mikael Abrahamsson wrote:
> ...Frankly, I don't much mind if this TCP session goes back to this
> painfully bad state every 30 seconds to re-probe the PMTUD value, at
> least it'll not be completely broken.
>
> I just want this default-on in all major TCP stacks, in the next few
> years. The simpler, the better and the higher chance that it'll get
> adopted, right? 

It would be useful to be careful. I'd rather see a TCP that runs just
fine (but maybe not as fast as you think it should) with 400 byte
packets than one that keeps bashing its head against a rock trying to
find the "best" larger packet size, failing, and "limping" along that
way continually.

Joe

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