From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 2 Oct 2001 05:55:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 2 Oct 2001 05:55:18 -0400 Received: from mail.pha.ha-vel.cz ([195.39.72.3]:43012 "HELO mail.pha.ha-vel.cz") by vger.kernel.org with SMTP id ; Tue, 2 Oct 2001 05:55:05 -0400 Date: Tue, 2 Oct 2001 11:55:31 +0200 From: Vojtech Pavlik To: Pavel Machek Cc: Matti Aarnio , Karel Kulhavy , linux-kernel@vger.kernel.org Subject: Re: Ethernet Error Correction Message-ID: <20011002115531.A7176@suse.cz> In-Reply-To: <20010925223437.A21831@atrey.karlin.mff.cuni.cz> <20010926004345.D11046@mea-ext.zmailer.org> <20010927142251.A58@toy.ucw.cz> <20011002112921.A7117@suse.cz> <20011002114801.A19015@atrey.karlin.mff.cuni.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20011002114801.A19015@atrey.karlin.mff.cuni.cz>; from pavel@suse.cz on Tue, Oct 02, 2001 at 11:48:01AM +0200 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 02, 2001 at 11:48:01AM +0200, Pavel Machek wrote: > Hi! > > > > > Also, generic PROMISC mode still drops off received frames > > > > with CRC error. > > > > > > Hmm, sounds good. Someone should create tool for communication over > > > ethernet with broken crc's. Such communication would be stealth from > > > normal tcpdump. Do it on your provider's network to escape accounting ;^) > > > > But still you'll see the number of errors on your eth card > > skyrocketing, so you'd grow quite suspicious. > > Yep, but it would be _very_ hard for you to find the cause. You'd > probably chase ghosts trying to replace cables, etc, never finding > what happens. Well, if you checked all the cables, you'd most likely find the device capable of sending the bad CRC frames. Also, if you use a switch (not ha hub or coax), it won't work at all. -- Vojtech Pavlik SuSE Labs