[mrtg] Re: Cisco Cat 3548XL

Shane Castle swcxt at co.boulder.co.us
Thu Apr 18 20:38:15 MEST 2002

On Thu, 18 Apr 2002, Jamie Starkel wrote:

>I have a Cisco Catalyst 3548XL switch. Right now I have mrtg monitoring
>the network traffic on it and it's working fine. It shows all 48 ports,
>but is there any way I can get it to resolve what IP address each port
>is going to? When our network was first set up, everything was just
>plugged into the switch in a random order.

The short answer is "no" - it's a switch, which is a Layer 2 device,
and so has no idea at all of what IP addresses are connected to it.
It does know MACs, though, and so there is a long answer that is "yes" but
it requires much looking at CDP caches, router ARP lists, and the like.
CiscoWorks has a display that will show this quite prettily but of course
you have to buy and install it on a suitable server for it to do you
much good.  Others may have somewhat shorter, more implementable answers.

Shane Castle             | "Perfection, then, is finally achieved, not
Boulder County Info Svcs | when there is nothing left to add, but when
Boulder CO USA           | there is nothing left to take away."
                         |                - Antoine de Saint-Exupery

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