Let us say there are two Networks: A (10.100.90.0) and B(192.168.1.0). Network A has a DHCP server.
We know that when multiple devices are connected to network A, the devices get the IP address from the DHCP server connected to network A (e.g. 10.100.90.1,100.100.90.2 etc.).
Let us say we have connected to a (new) switch to network A. The devices connected to this switch get IP addresses from the DHCP server in network A.
As we see in the diagram, there is a router in between two networks. I am using a load balancing router. I want the Laptop 0 to get its IP address from the DHCP server connected on the network A side (ignore the server on Network B side; it does nothing).
I think I should change the way I ask the question!
Can I use a (external) DHCP server instead of the router to assigning the IP addresses to the devices connected to it?
The Ip-Helper address command works!!! But the DHCPREQUEST Packet is being rejected by the DHCP Server. No DHCPOffer is being sent back to the client?!
I added a pool of addresses for network B in DHCP server and laptop 0 was able to get an ip address from the DHCP Server! :-)