[117515] in North American Network Operators' Group
Re:
daemon@ATHENA.MIT.EDU (sthaug@nethelp.no)
Wed Sep 16 15:01:20 2009
Date: Wed, 16 Sep 2009 21:00:38 +0200 (CEST)
To: mruiz@telwestservices.com
From: sthaug@nethelp.no
In-Reply-To: <9F285BFE1D7757499D9FF095B4EE347D0449C144@tw-xchange01.TWC.local>
Cc: Brian.Dickson@concertia.com, nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
> I checked the MTUs on the 3550s and I am seeing the Fast E
> interfaces are still showing 1500 bytes. Would increasing the MTU size
> on the switches cause any harm?
The 3550s are very limited with respect to MTU - the standard model
can only do up to 1546 byte, while I believe the -12G model can to
2000 byte. In any case - you won't get a 4470 byte packet through a
3550. Also, changing the MTU on the 3550 requires a reboot.
Steinar Haug, Nethelp consulting, sthaug@nethelp.no
