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From: Terry Lambert <terry@lambert.org>
Message-Id: <199708142154.OAA19308@phaeton.artisoft.com>
Subject: Re: Well, I guess it's about time I mentioned this little problem...
To: jkh@time.cdrom.com (Jordan K. Hubbard)
Date: Thu, 14 Aug 1997 14:54:39 -0700 (MST)
Cc: wollman@FreeBSD.ORG, current@FreeBSD.ORG
In-Reply-To: <1433.871583550@time.cdrom.com> from "Jordan K. Hubbard" at Aug 14, 97 11:32:30 am
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> During my conversation with David, he
> suggested that I drop the MTU on box A's ethernet interface from 1500
> to 500 and TADA!  Suddenly these URLs (one of which is
> http://www.sunlabs.com/) could be visited just fine from box A, no
> problems.
> 
> So the question is: What is it about the MTU size of the ethernet
> interface on box A which effects the ability of the gateway box G to
> pass traffic to box A?

Well, for my first wild guess, I'd like to propose that you disable
the 1323/1644 stuff on the boxes where it's on, and try again, if
possible...

The act of lowering the MTU is probably resulting in fragging of the
packets which come in at a higher MTU, and as such, disabling the
data+ACK stuff (if it's on -- logically, you can't leave the ACK
in the first packet if it's not the only packet).

It *could* be a FreeBSD bug, but I think it's probably the other
end, if I had to guess (which I do ;-)).


					Terry Lambert
					terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.