DHCP relay

[chrisp909]

Working on my 70-215 came across a question about putting a DHCP client Win2000 server on the opposite side of a router from the DHCP server. How can it be fixed?

The answer was use a DHCP client on the network that does not have the DHCP server.(also a BOOTP setting on the router)

Why would you want to separte a piece of a network with a router then serve up the same network scope that is on the other side of the router.

 

[chrisp909]

sorry had to run and didn't check what I typed.

The Answer was put a DHCP Relay Agent on the other side of the router. Obviously it can't be a DHCP client or it would be in the same boat as the server in question.

 

[zmann]

The reason that you would do this is for example you have subnet A and subnet B. Your dhcp server resides on subnet A the router you have is older and only allows BootP, if you set up a relay agent on subnet B the DHCP server on subnet A can service request from clients from subnet B.
Basically this scenario is set up for older routers that can not route DHCP request and DHCP acknowledge messages. The older routers that don't know what these packets are will just drop the packets, preventing one DHCP server to service multiple subnets and scopes. Most routers in production today will not have this problem. Hope this helps.