Q: Is it possible to have two DHCP server on the same LAN/SUBNET? Is it possible to have two DHCP server on the same LAN/SUBNET? If so, how can you configure it?
I'm doing some research and I'm getting mixed results. In one article, it says "On the same subnet, you absolutely cannot run two DHCP servers that assign addresses from the same range. However, on the same subnet, you can have two DHCP servers that assign addresses from different ranges". Another article says that you can setup DHCP failover. 
Can anyone help explain this to me? I would greatly appreciate it.

A: It depends on the dhcp server implementation. If there is no communication between the servers then the address pools should not overlap. If there is a communication mechanism, such as ISC's dhcp server, then the address pools can overlap.
