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Re: [tcpm] PLPMTUD for all protocols

Mikael Abrahamsson <swmike@swm.pp.se> Thu, 29 March 2018 13:10 UTC

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Date: Thu, 29 Mar 2018 15:10:09 +0200
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: "Maxim Proshin [GMAIL]" <mvproshin@gmail.com>
cc: William Herrin <bill@herrin.us>, tcpm@ietf.org
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Subject: Re: [tcpm] PLPMTUD for all protocols
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On Thu, 29 Mar 2018, Maxim Proshin [GMAIL] wrote:

> What is a status of classical PMTUD in Linux TCP? Is it enabled by default?
> I guess it's enabled by default but TCP implementation actually relies on
> IP for that.

Classic PMTUD (as in getting back need-to-frag/Packet-too-big ICMP 
messages) is something TCP relies on by standard, and this is default on.

The problem is when an ICMP error message isn't generated or doesn't reach 
the intended recipient, that's when blackhole occurs, and what I want to 
solve.

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se

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