With the release of WS2012 there are many new features included and discussed. One I find personally great is DHCP Failover !
If you’re planning WS2012 DHCP servers, you should most certainly look into this feature and use it…
Ensuring High Availability of DHCP using Windows Server 2012 DHCP Failover
Step-by-Step: Scoping out the NEW DHCP Failover in Windows Server 2012 – 31 Days of Favorite Features ( Part 28 of 31 )