Cisco Switch err-disable port status

I ran into an interesting problem today in my young Networking & Cisco career.  I got a call about a switch port on one of our stacks having a status of err-disabled.

This is most likely because we run BDU on our network and something at some point got plugged into that port that the switch did not like and put it in this status.  There are a number reasons that a switch could put a port into this status.  I found a great article that explains thoroughly the reasons and how to discover why the switch port got put into the err-disabled status.  Read it here: http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b.shtml

The quick way to get the port back to normal mode is to get to the configuration of the disabled interface and issue the shutdown command and then issue the no shutdown command.  So your essentially power cycling that switchport in the eyes of the OS on the switch.  Now you can see a happy switchport!

Cheers!