Why connect two dhcp servers with different IP addresses?


so for an assignment at college we had to configure a router connected to two switches which both had a server connected to them.
the computers were connected via dhcp to either server however each side had a different IP. we have now been asked to justify as to why two servers were used with different IP which I cannot quite produce a business orientated answer.
I can understand connecting two dchp servers on same IP to increase fault tolerance but I do not understand using two separate IP addresses.

Hi,
Does “using two separate IP addresses“ mean 2 subnets which are connected by router？
If you have separately configured 2 DHCP servers on the 2 subnets, and want 1 of the 2 DHCP servers to provide fault tolerance for the other. You need to use an RFC 1542–compliant router, or DHCP relay agent, in order to forward DHCP broadcast traffic.
If there is any misunderstanding about your question, please correct. 
Best Regards,           
Eve Wang                                                                             
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