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Re: [v6ops] PMTUD forever, was: MTUs on the general Internet

Jeroen Massar <jeroen@massar.ch> Fri, 05 December 2014 10:56 UTC

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Date: Fri, 05 Dec 2014 11:56:01 +0100
From: Jeroen Massar <jeroen@massar.ch>
Organization: Massar
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To: Philip Homburg <pch-v6ops-3@u-1.phicoh.com>, "v6ops@ietf.org WG" <v6ops@ietf.org>
References: <547F37B4.8050509@massar.ch> <2134F8430051B64F815C691A62D9831832DA9AD6@XCH-BLV-504.nw.nos.boeing.com> <547F3CE8.4090302@massar.ch> <20141204.095809.74726281.sthaug@nethelp.no> <54802E1D.9070401@massar.ch> <E3AB782E-8127-44C6-B870-78D0B6C34A53@apnic.net> <20141205091812.39854739@echo.ms.redpill-linpro.com> <B01FA89B-C104-49F4-B3E8-B4AD5FD66F31@muada.com> <20141205094341.799a12ad@echo.ms.redpill-linpro.com> <CEB65A05-C9AC-4A41-A853-40B8364848CD@muada.com> <20141205101850.6e58b351@echo.ms.redpill-linpro.com> <FB49ED19-157D-4EB6-A44C-52E383D7282B@muada.com> <20141205110546.2ef6ebf1@echo.ms.redpill-linpro.com> <m1XwqGy-0000ChC@stereo.hq.phicoh.net>
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Subject: Re: [v6ops] PMTUD forever, was: MTUs on the general Internet
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On 2014-12-05 11:38, Philip Homburg wrote:
> In your letter dated Fri, 5 Dec 2014 11:05:46 +0100 you wrote:
>> Also, increasing the outer MTU to 1520+ is impossible in most cases,
>> because you have to be certain that *every* device in the network
>> (including any user-owned/managed HGWs) supports mini-jumbos.
> 
> Another way forward is to have to 'internet facing' side of the tunnel forward
> large packets fragmented.

Only end hosts do fragmentation in IPv6.

Also, hosts that are causing these problems are not going to perform an
even heavier task.

Greets,
 Jeroen

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