Microsoft has finally made some improvements to the DHCP server role with its introduction of Windows Server 2012. One of the most exciting changes being the ability to make your DHCP servers highly available!
However, upon our testing of this new feature, we found that it does not like DHCP reservations and would cause our reserved IP’s to be listed as BAD_ADDRESS in the scope. This of course prevented those PC’s from obtaining an IP address, rendering them virtually useless! This issue exists in both Load Balanced and Hot Standby modes.