Yea, what Chris said.  But basically you create a special port in your
Cisco 4507 that mirrors all the traffic from the other ports.  Called
a SPAN port.

Shane


On Wed, 09 Mar 2005 11:52:29 -0800, Lorenzo Fife
<[EMAIL PROTECTED]> wrote:
> Hi, i just installed NTOP on a debian machine (i'm learning Debian) and it
> seems GREAT.  seems amazingly powerful, and i love it so far.
> 
> however i'm curious about a few things.  first, i've got the linux box
> running NTOP plugged into a catalyst 4507r switch, and the other hundreds of
> ports the switch has are all going to other hosts on the network.  how is
> NTOP able to acquire information such as traffic and bandwidth of other
> hosts, if it's just a host itself?  i mean, only the switch has that
> information, doesn't it?  since only the switch has all traffic going
> through it to the outside world.
> 
> so does my NTOP linux machine analyze EVERY packet moving on the network?
> how do i know if it's accurate, you know?
> 
> Thanks
> 
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