[95952] in North American Network Operators' Group
Re: Thoughts on increasing MTUs on the internet
daemon@ATHENA.MIT.EDU (Pierfrancesco Caci)
Thu Apr 12 06:04:55 2007
To: Iljitsch van Beijnum <iljitsch@muada.com>
Cc: NANOG list <nanog@merit.edu>
Reply-To: Pierfrancesco Caci <p.caci@seabone.net>
From: Pierfrancesco Caci <p.caci@seabone.net>
Date: Thu, 12 Apr 2007 12:02:41 +0200
In-Reply-To: <4BC9B966-6370-4ABC-9FA2-F80C5CF0B44F@muada.com> (Iljitsch van Beijnum's message of "Thu, 12 Apr 2007 11:20:18 +0200")
Errors-To: owner-nanog@merit.edu
:-> "Iljitsch" == Iljitsch van Beijnum <iljitsch@muada.com> writes:
> Dear NANOGers,
> It irks me that today, the effective MTU of the internet is 1500
> bytes, while more and more equipment can handle bigger packets.
> What do you guys think about a mechanism that allows hosts and
> routers on a subnet to automatically discover the MTU they can use
> towards other systems on the same subnet, so that:
> 1. It's no longer necessary to limit the subnet MTU to that of the
> least capable system
> 2. It's no longer necessary to manage 1500 byte+ MTUs manually
> Any additional issues that such a mechanism would have to address?
wouldn't that work only if the switch in the middle of your neat
office lan is a real switch (i.e. not flooding oversize packets to
hosts that can't handle them, possibly crashing their NIC drivers) and
it's itself capable of larger MTUs?
Pf
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Pierfrancesco Caci | Network & System Administrator - INOC-DBA: 6762*PFC
p.caci@seabone.net | Telecom Italia Sparkle - http://etabeta.noc.seabone.net/
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