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

Jeroen Massar <jeroen@massar.ch> Sat, 06 December 2014 12:26 UTC

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Date: Sat, 06 Dec 2014 13:26:25 +0100
From: Jeroen Massar <jeroen@massar.ch>
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To: sthaug@nethelp.no
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Subject: Re: [v6ops] PMTUD forever, was: MTUs on the general Internet
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On 2014-12-06 12:20, sthaug@nethelp.no wrote:
>>> that should be turned off as soon as possible. That will happen as more
>>> and more links set MTUs larger than 1500.
>>
>> IPv6 should also have been deployed globally as soon as possible...
> 
> Speaking only for myself: We run with a suitable jumbo MTU on most
> links *within our AS*. I see no sign of such an increased MTU becoming
> more available on peering and transit links.

Agreed.

IMHO one big reason of which is that there are cases where PMTU does not
work 100% and thus there is no real benefit of enabling larger MTUs as
it will only give problems (as it is something not well known) and thus
higher support cost, than creating faster transfers.

Hence, a status quo.

Greets,
 Jeroen

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