IP Address Conflict?

Hello, all

Ok, here where I work we are having an issue with IP Address conflicts. We are not sure exactly why, though. We have only had it happen 2-3 times so far, but this has been over the past week or so, and we would like to get it resolved. Here is what is happening:

Last week we were getting an "IP Address conflict" message on one of our computers. It had recieved 192.168.3.112 from our DCHP server, so we switched it to a static IP address up beyond our DHCP range. We then tried pinging the address with the conflict, but got nothing. We figured it was some device that had a static address, so on the DHCP server we reserved it to a non-existent mac address so it wouldn't hand that one out again. This wasn't a problem, since it was an isolated incident. Since then we have tried periodically pinging 192.168.3.112 to see if there is actually a device using that address, but have gotten no replies.

Since then we have had another one or two times where this has happened, but with different IP addresses. We went around and checked a couple of different wireless routers that we had deployed, but the DHCP had been disabled on all of them (but then again, the issue came up just recently, while the routers have been out there for months).

So, anybody have any ideas of how to track down the reason for these issues? Like previously stated, we have been unable to get any responses from pinging the conflicting IP address.

Thanks!

Can you not see the device in the router's settings and if necessary, disallow it and wait to see who complains?

Two possibilities - one is that a single machine is connecting twice, once cabled and once wireless - and the second is that you might only be looking for a Plug and Pray device.