From owner-freebsd-net@FreeBSD.ORG  Fri Sep  7 19:10:48 2007
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 5E4E216A418
	for <freebsd-net@freebsd.org>; Fri,  7 Sep 2007 19:10:48 +0000 (UTC)
	(envelope-from julian@elischer.org)
Received: from outV.internet-mail-service.net (outV.internet-mail-service.net
	[216.240.47.245])
	by mx1.freebsd.org (Postfix) with ESMTP id 4581213C428
	for <freebsd-net@freebsd.org>; Fri,  7 Sep 2007 19:10:48 +0000 (UTC)
	(envelope-from julian@elischer.org)
Received: from mx0.idiom.com (HELO idiom.com) (216.240.32.160)
	by out.internet-mail-service.net (qpsmtpd/0.40) with ESMTP;
	Fri, 07 Sep 2007 12:10:34 -0700
Received: from julian-mac.elischer.org (home.elischer.org [216.240.48.38])
	by idiom.com (Postfix) with ESMTP id 96BB9126302;
	Fri,  7 Sep 2007 12:10:33 -0700 (PDT)
Message-ID: <46E1A229.10308@elischer.org>
Date: Fri, 07 Sep 2007 12:10:33 -0700
From: Julian Elischer <julian@elischer.org>
User-Agent: Thunderbird 2.0.0.6 (Macintosh/20070728)
MIME-Version: 1.0
To: Julian Elischer <julian@elischer.org>, 
	David Christensen <davidch@broadcom.com>,
	FreeBSD Net <freebsd-net@freebsd.org>
References: <46E0632D.8070200@elischer.org> <46E07E74.5020204@elischer.org>
	<09BFF2FA5EAB4A45B6655E151BBDD9030501D5C0@NT-IRVA-0750.brcm.ad.broadcom.com>
	<46E0A5DB.3080404@elischer.org> <20070907172216.GL977@funkthat.com>
In-Reply-To: <20070907172216.GL977@funkthat.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: 
Subject: Re: FreeBSD discarding received packets > MTU
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 07 Sep 2007 19:10:48 -0000

John-Mark Gurney wrote:

> 
> Why not set the mtu on the net and host routes to 1500 to make it all
> work?  I forget if my route mtu code is in 6.2, but it'll be in 7.0...

I think it is..
took us ages to figure out why some client machines hit this and 
others didn't. turned out that there were MTUs on some routes that were different 
to others for various reasons.


I was considering using 
  route change (route) -mtu 1440
as a workaround, but it's a bit dependent on knowing what and where all your routes are.