From owner-freebsd-ipfw@FreeBSD.ORG  Fri Sep 14 17:59:16 2012
Return-Path: <owner-freebsd-ipfw@FreeBSD.ORG>
Delivered-To: freebsd-ipfw@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id B5FCE106564A
	for <freebsd-ipfw@freebsd.org>; Fri, 14 Sep 2012 17:59:16 +0000 (UTC)
	(envelope-from smithi@nimnet.asn.au)
Received: from sola.nimnet.asn.au (paqi.nimnet.asn.au [115.70.110.159])
	by mx1.freebsd.org (Postfix) with ESMTP id 2D4A38FC0A
	for <freebsd-ipfw@freebsd.org>; Fri, 14 Sep 2012 17:59:15 +0000 (UTC)
Received: from localhost (localhost [127.0.0.1])
	by sola.nimnet.asn.au (8.14.2/8.14.2) with ESMTP id q8EHx3Jb053722;
	Sat, 15 Sep 2012 03:59:03 +1000 (EST)
	(envelope-from smithi@nimnet.asn.au)
Date: Sat, 15 Sep 2012 03:59:03 +1000 (EST)
From: Ian Smith <smithi@nimnet.asn.au>
To: Soren Dreijer <dreijer+bsd@echobit.net>
In-Reply-To: <CALoZf3hxdEcwXLVLi9Xdx2S+v45-GNQo4b4XVcn-fGhB4y1Z+w@mail.gmail.com>
Message-ID: <20120915034627.V51539@sola.nimnet.asn.au>
References: <CALoZf3hfZDQQ4ZEXMrGUkYiGvb5QPoAcbpUikAq1adqVY4fLyg@mail.gmail.com>
	<20120913221758.E51539@sola.nimnet.asn.au>
	<CALoZf3iCf1_fHgAWUXa3fgudOe66sbk35P0CYhgsneBuhCORJg@mail.gmail.com>
	<20120913163013.GA22049@onelab2.iet.unipi.it>
	<CALoZf3iRzx5V=1th32LE8OCa0_GTBNGSZeGuH9qTp4Fk1j3ZRw@mail.gmail.com>
	<20120913174612.GB22571@onelab2.iet.unipi.it>
	<CALoZf3jRpcryGE0TXxdmZ0d6eD1KbJTY-KaNQEiUPuBuPzWtBA@mail.gmail.com>
	<20120914144529.R51539@sola.nimnet.asn.au>
	<CALoZf3hxdEcwXLVLi9Xdx2S+v45-GNQo4b4XVcn-fGhB4y1Z+w@mail.gmail.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Cc: freebsd-ipfw@freebsd.org, Luigi Rizzo <rizzo@iet.unipi.it>
Subject: Re: Significant network latency when using ipfw and in-kernel NAT
X-BeenThere: freebsd-ipfw@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: IPFW Technical Discussions <freebsd-ipfw.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-ipfw>,
	<mailto:freebsd-ipfw-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-ipfw>
List-Post: <mailto:freebsd-ipfw@freebsd.org>
List-Help: <mailto:freebsd-ipfw-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-ipfw>,
	<mailto:freebsd-ipfw-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 14 Sep 2012 17:59:16 -0000

On Fri, 14 Sep 2012 09:12:27 -0500, Soren Dreijer wrote:

 > Can anybody confirm that disabling these other options (rxcsum,
 > txcsum, vlanmtu, vlanhwtag, vlanhwfilter, vlanhwtso) won't cause my
 > adapter to lose its connectivity? This is a server in production and
 > I'd rather not cause an outage if I can prevent it. :)

Fair question Soren.  I've configured no VLANs; out of my depth, again!

cheers, Ian

 > On Fri, Sep 14, 2012 at 12:00 AM, Ian Smith <smithi@nimnet.asn.au> wrote:
 > > On Thu, 13 Sep 2012 12:37:23 -0500, Soren Dreijer wrote:
 > >      [Luigi Rizzo wrote:]
 > >  > > i'd start by disabling all accelerations (and jumobgrams)
 > >  > > and then move on from the results to figure out where is the problem.
 > >  >
 > >  > So, I went ahead and disabled TSO on ix0. That seemed to fix the
 > >  > intermittent connection issues I had been experiencing with keeping an
 > >  > XMPP connection alive to one of our internal boxes. It hasn't done
 > >  > anything for the ICMPs or TCP traffic originating from the FreeBSD
 > >  > box, of course.
 > >
 > > Please show ifconfig for ix0 and ix1 again after disabling tso,
 > > rxcsum, txcsum, vlanmtu, vlanhwtag, vlanhwfilter, vlanhwtso
 > > and any other configured accelerations, as Luigi recommended?
 > >
 > > Then we'd know if your problem was related to any of that, or not.
 > >
 > > cheers, Ian
 >