My mind is drawing a blank of what the to exactly call it, but I remember seeing software (via a web browser) that displayed all the interfaces on a switch that were online and alive. It would allow you to drill down into a selected interface and show who was connected (MAC address), Connection speed, number of errors and so on.
I'm pretty sure it used general SNMP probes to get all of the data so it was not specific to any one brand of switch / router. Anybody know something that can do this? I'm sure there are quite a few products that do this, but I would like one that was web based.