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To: "Louis A. Mamakos" <louie@TransSys.COM>
cc: Michael Smith <msmith@atrad.adelaide.edu.au>, taob@io.org (Brian Tao),
        freebsd-hackers@FreeBSD.org
Subject: Re: Changing Ethernet frame size to 576 bytes? 
In-reply-to: Your message of "Sun, 24 Mar 1996 10:03:56 EST."
             <199603241503.KAA21220@wa3ymh.transsys.com> 
From: David Greenman <davidg@Root.COM>
Reply-To: davidg@Root.COM
Date: Sun, 24 Mar 1996 10:14:26 -0800
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>> You can discount the "normal Internet packet size" concept; there ain't
>> no such animal.  As has been already observed, 576 is the minimum 
>> permitted MSS.
>
>To be completely correct, 576 would be considered the minimum MTU.
>Given that, the associated TCP MSS on that path ought to be 536 bytes.

   The TCP/IP header with options can be 64 bytes large, so this makes it 512.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project