[67225] in North American Network Operators' Group
MTUs - Was: Strange public traceroutes return private RFC1918 addresses
daemon@ATHENA.MIT.EDU (Warren Kumari)
Thu Feb 5 15:07:34 2004
In-Reply-To: <ce27c51c8e15c26e283204fbcd279bba@noorgroup.net>
From: Warren Kumari <warren@kumari.net>
Date: Thu, 5 Feb 2004 15:04:00 -0500
To: nanog@merit.edu
Errors-To: owner-nanog-outgoing@merit.edu
Ok, I know that this is getting away from the original thread, but I've
always wondered this...
Why is the MTU on Ethernet 1500 bytes? I have looked through various
docs (eg IEEE Std 802.x) and can find where maxUntaggedFrameSize is
listed as 1518 octets, but there is no mention of why this was chosen.
I know where the minimum frame size comes from (CSMA/CD and propagation
times, etc), but the maximum frame size number sounds fairly arbitrary.
-- Warren.
On Feb 4, 2004, at 5:46 PM, Hani Mustafa wrote:
>
> How does a 50Mbyte MTU sound like?
>
> http://www.psc.edu/~mathis/MTU/
>
> ~Hani Mustafa
>
>
"Build a man a fire, and he'll be warm for a day. Set a man on fire,
and he'll be warm for the rest of his life." -- Terry Pratchett
