[15002] in North American Network Operators' Group
Re: MTU of the Internet?
daemon@ATHENA.MIT.EDU (Matthew Petach)
Thu Feb 5 04:21:36 1998
From: Matthew Petach <mpetach@netflight.com>
To: peterf@microsoft.com (Peter Ford)
Date: Thu, 5 Feb 1998 01:16:50 -0800 (PST)
Cc: nanog@merit.edu
In-Reply-To: <8D8EF175E72CD111805800805F3198EE03925BE0@red-msg-46.dns.microsoft.com> from "Peter Ford" at Feb 3, 98 09:57:23 pm
>
> Several people have noted to the Microsoft Support and Product groups that
> they want the Windows 95 PPP MTU to be set to 576 (down from 1500). this
> change is in Windows 98.
Wrong direction.
> The reason for this change cited by many customers is that many ISPs have
> 576 MTUs set "inside" their networks and packets get fragmented.
Nope.
> How prevelant is this fragmentation and how prevelant is this MTU in ISPs?
It's not. Quite frankly, I like the 9127 used by Alteon switches
and NICs within our network.
> Why do ISPs set their MTUs to 576 instead of ~1500 or even ~4K?
We don't. In fact, we like the MTUs as high as possible, hence
the choice of Alteon, with jumbo frames.
> thanks in advance for your responses,
> peter
You're welcome! Please take this feedback, and adjust Win2000
accordingly... :-)
Thanks!
Matt
