I'm also still having this problem:
all scopes for dhcp clients fluded with bad_address
My DHCP server is Win 2003 standard with only one network
interface enabled. And there is 5 conflict detection attempt
configured. All knowlege base articles that i found out
does not match my situation.
And very interesting that all this bad_address appears
with 6-bytes Unique Identifier, when all other clients
have MAC address as Unique Identifier.
Did anybody know what is the possible reason of such
You must have an ip conflict on the client side. A bad address entry is entered When a third-party Dynamic Host Configuration Protocol (DHCP) client detects that the Transport Control Protocol/Internet Protocol (TCP/IP) address received from a DHCP server already exists on the Local Area Network (LAN), the DHCP client may send a DHCP decline message to the DHCP server. This would be the BAD_ADDRESS message you are getting. You will need to go to all clients and cross reference there ip's this includes network printers, routers, switches anything that could have a static or dynamic address on the network.