From owner-freebsd-net Fri Jul 12 10: 2:31 2002 Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4479E37B400 for ; Fri, 12 Jul 2002 10:02:30 -0700 (PDT) Received: from prism.flugsvamp.com (66-191-112-47.mad.wi.charter.com [66.191.112.47]) by mx1.FreeBSD.org (Postfix) with ESMTP id A699643E58 for ; Fri, 12 Jul 2002 10:02:29 -0700 (PDT) (envelope-from jlemon@flugsvamp.com) Received: (from jlemon@localhost) by prism.flugsvamp.com (8.11.6/8.11.6) id g6CH0m210374; Fri, 12 Jul 2002 12:00:48 -0500 (CDT) (envelope-from jlemon) Date: Fri, 12 Jul 2002 12:00:48 -0500 From: Jonathan Lemon To: "Cambria, Mike" Cc: "'Jonathan Lemon'" , cambria@world.std.com, net@freebsd.org Subject: Re: xl checksum and dsniff Message-ID: <20020712120048.B8927@prism.flugsvamp.com> References: <3A6D367EA1EFD4118C9B00A0C9DD99D7065A34@rerun.avayactc.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0pre2i In-Reply-To: <3A6D367EA1EFD4118C9B00A0C9DD99D7065A34@rerun.avayactc.com> Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Fri, Jul 12, 2002 at 09:06:13AM -0400, Cambria, Mike wrote: > > -----Original Message----- > > From: Jonathan Lemon [mailto:jlemon@flugsvamp.com] > >> > > > >My guess is that doing hw checksum by the nic could be the > > issue. This is > > >the only real difference I can see at present. > > > > > >Any ideas? > > > > Test your theory. Turn off hardware checksums with 'ifconfig > > xl0 -txcsum' > > When I do 'ifconfig xl0 -txcsum', a subsequent 'ifconfig' reads as if the > command had no effect. In other words, ifconfig shows > options=3 still. Oh, hmm. It appears that this driver doesn't support disabling checksums. For the time being, you can recompile the driver, and manually disable the checksums by editing the define at the top of the file: #define XL905B_CSUM_FEATURES 0 -- Jonathan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message