From: Rob Landley <landley@trommello.org>
To: Vojtech Pavlik <vojtech@suse.cz>, Pavel Machek <pavel@suse.cz>
Cc: Matti Aarnio <matti.aarnio@zmailer.org>,
Karel Kulhavy <clock@atrey.karlin.mff.cuni.cz>,
linux-kernel@vger.kernel.org
Subject: Re: Ethernet Error Correction
Date: Thu, 4 Oct 2001 17:34:17 -0400 [thread overview]
Message-ID: <01100417341701.02393@localhost.localdomain> (raw)
In-Reply-To: <20010925223437.A21831@atrey.karlin.mff.cuni.cz> <20011002114801.A19015@atrey.karlin.mff.cuni.cz> <20011002115531.A7176@suse.cz>
In-Reply-To: <20011002115531.A7176@suse.cz>
On Tuesday 02 October 2001 05:55, Vojtech Pavlik wrote:
> On Tue, Oct 02, 2001 at 11:48:01AM +0200, Pavel Machek wrote:
>
> 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.
You can cause a lot of switches to degrate to HUB mode by overloading their
arp cache mac address table thingy. (Fun for packet sniffing when you've got
a card that can change its mac address in software. Send packets originating
from a few thousand different mac IDs and watch the switch throw up its hands
and go "AAAAAH!". Sniffing the right init sequence for a pppoe connection
with nonstandard authentication can be a bit difficult otherwise, with modern
hardware... :)
I haven't tried it on a very wide variety of manufacturer's switches, though.
And I dunno how that relates to CRC behavior...
Rob
next prev parent reply other threads:[~2001-10-05 1:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-25 20:34 Ethernet Error Correction Karel Kulhavy
2001-09-25 20:57 ` Richard B. Johnson
2001-09-25 21:19 ` Ben Greear
2001-09-26 12:37 ` Richard B. Johnson
2001-09-25 21:43 ` Matti Aarnio
2001-09-27 14:22 ` Pavel Machek
2001-10-02 9:29 ` Vojtech Pavlik
2001-10-02 9:48 ` Pavel Machek
2001-10-02 9:55 ` Vojtech Pavlik
2001-10-04 21:34 ` Rob Landley [this message]
2001-10-02 9:56 ` Matti Aarnio
2001-09-26 16:51 ` Alan Cox
2001-09-27 5:26 ` Albert D. Cahalan
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