A workstation is added to a newly created subnet using 192.168.100.0/24. A DHCP server is
available on subnet 192.168.101.0/24. The user is unable to lease an address from the DHCP
server. Which of the following would BEST resolve the problem?
A.
Assign the workstation a static IP address.
B.
Add a second DHCP server to the 192.168.101.0/24 subnet.
C.
Add a DHCP relay to the 192.168.100.0/24 subnet.
D.
Add a DHCP server to the 192.168.100.0/24 subnet.
DHCP Relay:
The requests are broadcasted by the clients on their local network, the relay-agent catches them and forwards them to the DHCP server using unicast. The returned DHCP answer gets to the relay agent using unicast as well, and the relay agent sends the answer on the client’s network.
DHCP relays can come in many shapes and forms: there is the Microsoft’s “relay-agent”, Cisco’s “IP helper” and Juniper’s “helpers bootp” to mention a few. They all do the same thing, and in this guide we will go over how to configure it on a JunOS device.