How to see which interface has phone plugged in?

jessdoherty · ‎12-03-2008

Have a 3750 switch running IOS 12.2 with both 7940 phones and desktop computers plugged into it.

We have 2 VLANs set up, (one for voice and one for data).

I am trying to figure out how I can find out which interface has a phone plugged in to it and which has a computer plugged in to it.

I know there is a way to do this because I accidentally stumbled across it a while back and remember thinking "Wow, this could be useful someday" but now that I need it I forgot how I did it!

Jon Marshall · ‎12-03-2008

Jess

"sh power inline" should show you if a phone is attached to the port -

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_40_se/command/reference/cli2.html#wp8729716

Jon

deepak.dalal · ‎12-03-2008

Jon's solution would be the better option if inline power is used. If the phones are powered using bricks, then I would recommend

#show cdp neighbors | include IP Phone

Deepak