I work with a network that has 6 logical subnets on one interface (E0). We just obtained the sixth in order to move everything on the other five into one flat address space to relieve router congestion. In a test move of the PDC/DHCP server, we lost DHCP services. It has been suggested that the helper address on the router needs to point to the new address of the server in order to forward on DHCP requests to the new subnet. It is my understanding, however, that the helper address is used for forwarding UDP broadcasts between physical interfaces. It is my belief, therefor, that because all our logical subnets are on one physical LAN on only the single router interface, that this is pointless. I would appriciate any help in better understanding this, especially if the address does indeed need set.
Thanks