RE: Span/Snoop ports...

["Lee Clemens" <snort () leeclemens net>]

That particular switch does support port mirring, as per the www.cisco.com:

Redirection of traffic from any port to a "sniff" port. (Any switching port
can be designated as a "sniff" port.)

But that would only be a port at a time, so it depends what you want to
monitor...even with a tap, is it possible to view all traffic going through
and amidst the switch?? i.e. without building 24/48 taps for each
connection? (I realize one tap for the uplink, but that would only grab the
outgoing/incoming traffic and not the LAN traffic)


-----Original Message-----
From: snort-users-admin () lists sourceforge net
[mailto:snort-users-admin () lists sourceforge net] On Behalf Of Ulric Eriksson
Sent: Friday, March 18, 2005 9:16 AM
To: Marc Hering
Cc: snort-users () lists sourceforge net
Subject: Re: [Snort-users] Span/Snoop ports...


On Fri, 18 Mar 2005, Marc Hering wrote:

> Hey Guys,
> I just deployed a Snort box to one of our data centers...and I ran into
> a bit of a snafu.  We have a 2948G-L3 switch and want to snort on it.
> The problem is that a L3 switch doesn't suppprt a snoop port...Has
> anyone found a way around this?

Depending on the IOS version, you should be able to use the "port 
monitor" or "monitor session" commands.

Ulric


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