Home page logo
/

basics logo Security Basics mailing list archives

RE: how to flood the mac address table of a switch?
From: "David Gillett" <gillettdavid () fhda edu>
Date: Wed, 3 Dec 2003 10:45:51 -0800

1.  Turn off spanning tree.

2.  Connect a cross-over cable between two switch ports.

3.  Wait a few minutes.

WARNING:  This may temporarily cripple the performance of your
network.  Remember to re-enable spanning tree as soon as you're
through testing (which should shut down one of the cross-connected
ports almost immediately).

  The result, though, is that every MAC address on your network
issues a broadcast packet will be "learned" on both the cross-
connected ports.  If that doesn't fill up the table, your network
is probably too small to worry about this issue.

David Gillett


-----Original Message-----
From: Hans Müller [mailto:ndof () gmx li]
Sent: December 1, 2003 09:17
To: security-basics () securityfocus com
Subject: how to flood the mac address table of a switch?


How can flood the mac address table of a switch, to see that 
the security 
function of my switch work?


--------------------------------------------------------------
-------------
--------------------------------------------------------------
--------------



---------------------------------------------------------------------------
----------------------------------------------------------------------------


  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]