Dhcp reservation and bad_address

Windows 2003 Ent running Dhcp reservations and dns. We only allow our computers on the network so I use dhcp reservation. I assign each mac address an IP address. Every few days I get an address that shows :Bad_Address ". It does list the IP address but show bad_address as the computer name and the mac address is a few garbage numbers.


Any ideas as to what is causing this?

We do repair our own laptops, replacing system boards. I do change the mac address in dhcp before the repaired laptop is placed on the network.

 

FYI
Reservations do not prevent unauthorised machines on your network. They simply "Reserve" a particular IP address for that MAC.

I am baffled you could do that many reservations and not "fat finger" atleast one.

I can do 5 reservations and mess up atleast one.

 

I use a scanner and then a barcode program. couple of clicks and all is in.

 

Cool!

So,
Make me understand how reservations is keeping unwanted clients out of your network?
Not doubting you but I can't grasp what your doing.

 

I have my range of IP addresses in an address pool. I use dhcp reservations so no laptop can connect unless I assign the mac an IP address. It works great except for the bad address problem.

 

Unless you have the pool set at the exact number of clients you have it will not reject anonymous DHCP requests.
Get where I'm comming from?

 

I have it set. Microsoft actually helped me set it up.