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mac address port idenfification

Last Modified: 2013-11-09
I inherited a network that has 10-15 D-Link Smart Switches spread across three locations. ALl of the switches have web interfaces that I can connect to for configuration, but nowhere can I find a way to display what MAC address is connected to which port.

I am trying to make troubleshooting take minutes, not hours and even the patch panels are not labeled an mapped properly (nor the jacks in the individual offices).

Now I know from the DHCP servers the MAC address of each and every computer, along with their physical location.

What I need to do now is be able to identify which switch port is connected to which physical office. The easiest way I figured to do this (other than watching 1 billion lights, unplugging a machine and seeing which one goes out) is to match the mac address of the machine connected to a particular port to my listing of known mac addresses and their locations.

Is there are tool that could be used (like a packet sniffer) that I could plug inline between the patch cable and the switch that would display the MAC of the machine connected at the other end? I've seen some offerings from Fluke that would probably do the job, but they are $10,0000+... If the tool could also check cable integrity, open or split pairs, etc. that would be a bonus.... I'd rather not spend more than $1,500 on such a device.

Thanks in advance.
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