From owner-freebsd-net  Mon Aug 19 18: 0: 6 2002
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From: Archie Cobbs <archie@dellroad.org>
Message-Id: <200208200045.g7K0jRN92144@arch20m.dellroad.org>
Subject: Re: MTU not working?
In-Reply-To: <Pine.BSF.4.21.0208191618520.32737-100000@InterJet.elischer.org>
 "from Julian Elischer at Aug 19, 2002 04:20:37 pm"
To: Julian Elischer <julian@elischer.org>
Date: Mon, 19 Aug 2002 17:45:27 -0700 (PDT)
Cc: Steve Francis <sfrancis@expertcity.com>,
	Jesper Skriver <jesper@FreeBSD.ORG>, Jeff Behl <jeff@expertcity.com>,
	net@FreeBSD.ORG
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Julian Elischer writes:
> > This is reproducible at will, so we can collect whatever info anyone
> > wants.
> 
> Yes 
> tcp needs to forget it ever sent that data, and refactor the entire
> transmit window. 
> 
> I'd agree this is a bug if it's reproducible by others too.

"Me too"...

I've seen this as well... FreeBSD simply ignoring the MTU
on an interface and sending 1500 byte packets anyway...

This was on a -stable'ish machine of some sort (don't remember).
Could it have something to do with IPSec? That may have been going.

-Archie

__________________________________________________________________________
Archie Cobbs     *     Packet Design     *     http://www.packetdesign.com

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