lkml.org 
[lkml]   [2001]   [Oct]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: Ethernet Error Correction
Date
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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:04    [W:0.042 / U:0.616 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site