I am managing two separate locations, both have a single 2008 R2 DNS/DHCP server and they both hold the FSMO roles. I want to create a secondary DNS/DHCP server at each location for redundancy. Here is where my problem lies, I have 2 servers running server 2012 R2 to use as the secondary. I have had no issues setting up redundant DNS with the 2008 and 2012 boxes. I've hit a roadblock with DHCP and i'm not liking what Google has to say.
Ideally i'd like to run a DHCP hot standby with the 2012 box. Load balance is an option as well if needed. One site would have no issues running a split scope as i only have ~60 devices. The other location has almost 200 devices, a split scope would be difficult to pull off.
I cannot upgrade the 2008 r2 boxes but i can downgrade the 2012 r2 boxes to 2008 r2.
Any thoughts or ideas would be appreciated.