I have a flat network running DHCP on a Server 2003 box. Just this week, I have been noticing my DHCP pool filling up with "BAD_ADDRESS" entries. These, obviously, have prevented users from logging on to the network. Wireshark lists some entries stating "Gratuitous ARP for 192.168.1.xxx - IP is already in use". I have a mixture of XP and 7 computers in the environment. Like I said, this problem has just started recently and needs to be resolved ASAP. We also have Symantec Endpoint and VIPRE antiviruses in our environment. We also have a WatchGuard XTM505 on the perimeter.
Thanks in advance for any help with this issue!