I cannot find a device on my network...

[Nerfherder]

I knew a company well into the 2000s that had an archaic 386, stashed away in a dusty room that time forgot. It was functioning as a mail router and the techies were quite content to let it hum away until time got the better of it. I wonder if it is still going...

If it ain't broke don't fix it.

 

[Necropolis]

If it ain't broke don't fix it.

The only problem is figuring out how to replace it once it does break...

 

[Merlin]

If its a managed switch try ssh or telnet ing to it. If its unmanaged hopefully you can find a old switch lurking around in the server room.

No-one here seems to know the credentials. Wonderful.

I'm inclined to follow NerfHerder's advice at this point... If it ain't broke...

 

[syntax]

You said you already have the mac address, so look at the cam / mac address table on your switches to trace which port this is plugged into.

 

[Merlin]

You said you already have the mac address, so look at the cam / mac address table on your switches to trace which port this is plugged into.

Thanks.

 

[biometrics]

I find this very handy to identify devices on our network: http://www.advanced-ip-scanner.com