In my customer network, we have 2 DHCP servers. One is fully controlled by me and another by a different vendor. I want to make sure a set of devices (my devices) when connected, should get IP address from my DHCP server. What is the best possible way to handle this situation. Following are the info turned out from my research.
I cannot make the other vendor's DHCP server as a relay server (because I am not very sure what his business logic does or any dependency on IPs etc.).
Reservations can be done in my DHCP server to map a mac id to IP address, but I should block vendor's DHCP server from giving any DHCP offers to my devices.
I can define a scope or subnet (not very sure about this technical term) to differentiate different pool of ip address to both DHCP servers. But again I am not very sure what his business logic does)
I am basically a programmer, my knowledge on network related area is very minimal.