At my job we have a Fluke Net Tool that, among other things, is very handy at identifying what port you are pl***ed into. For example, if you are at an end users desk, and the wall plate is not marked, you can plug in the net tool with a patch cable and run a scan. It will tell you what switch you are pl***ed into, the IP of the switch, the port on the switch you are on, and the VLAN.

These are expensive tools and it seems that we have a need for another one.

My question is: Have you ever seen any software (free would be good), that you can run on a laptop that will perform this simple function?