[95957] in North American Network Operators' Group
Re: Thoughts on increasing MTUs on the internet
daemon@ATHENA.MIT.EDU (Mikael Abrahamsson)
Thu Apr 12 08:07:53 2007
Date: Thu, 12 Apr 2007 14:03:48 +0200 (CEST)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: NANOG list <nanog@merit.edu>
In-Reply-To: <20070412115026.GB31278@mx.ytti.net>
Errors-To: owner-nanog@merit.edu
On Thu, 12 Apr 2007, Saku Ytti wrote:
> IXP peeps, why are you not offering high MTU VLAN option?
Netnod in Sweden offer MTU 4470 option.
Otoh it's not so easy operationally since for instance Juniper and Cisco
calculates MTU differently.
But I don't really see it beneficial to try to up the endsystem MTU to
over standard ethernet MTU, if you think it's operationally troublesome
with PMTUD now, imagine when everybody is running different MTU.
Biggest benefit would be if the transport network people run PPPoE and
other tunneled traffic over, would allow for whatever MTU needed to carry
unfragmented 1500 byte tunneled packets, so we could assure that all hosts
on the internet actually have 1500 IP MTU transparently.
--
Mikael Abrahamsson email: swmike@swm.pp.se
