Hello,
The "Bad Addresses" in the scope are probably from conflict detection being
enabled. If you have this enabled the server will ping an IP address before
it leases, if a response is recieved a "bad address" flag is created. You
can turn this off via the DHCP server advanced properties.
As per documentation:
Conflict detection can be used by either DHCP servers or clients to
determine whether an IP address is already in use on the network before
leasing or using the address.
DHCP client computers running Windows 2000 or Windows XP that obtain an IP
address use a gratuitous ARP request to perform client-based conflict
detection before completing configuration and use of a server offered IP
address. If the DHCP client detects a conflict, it will send a DHCP decline
message (DHCPDECLINE) to the server.
By default, the DHCP service does not perform any conflict detection. To
enable conflict detection, increase the number of ping attempts that the
DHCP service performs for each address before leasing that address to a
client. Note that for each additional conflict detection attempt that the
DHCP service performs, additional seconds are added to the time needed to
negotiate leases for DHCP clients.
Do you have any superscopes in use by any chance? Are your leases almost
used up? What is your lease expiration time?
Shane Brasher
MCSE (2003,2000,NT),MCSA, A+
Microsoft Platforms Support
Windows NT/2000 Networking
