Posted 07 February 2011 - 12:22 PM
The only thing I can up with is to trace out the dup. Somehow, someone got a static IP. I can't see a power outage effecting the machine name. If you can eliminate someone changing the machine name, then it has to be an IP conflict. You could set DHCP to a different range, assuming there are no static assignments in the new range. The other choice is finding a machine or two you know are good, and bring up machines one at a time until you find the offending machine. Is a server issuing DHCP addresses? If so, check the logs there. Other than that, complex tools like Wireshrk can identify the machine's MAC, to help you find it.