How do you configure Windows DHCP Server to handle Option 82?
Solution 1:
Here is the same question answered for other DHCP server platforms:
DHCP on-the-fly block assignment
As far as Windows Server 2008, it looks like you will need to do some programming to get the behavior you want. You might want to check out the Microsoft Windows DHCP Team Blog here:
http://blogs.technet.com/b/teamdhcp/
These blog entries seem to cover parts of what you want to do:
Option based IP Address assignment Callout Dll
DHCP Server Callout API usage