AN Lesson-17

Configuring and Managing Routing Protocols-II

DHCP Relay Agent

• DHCP Relay Agent is a routing protocol that allows client computers to obtain an address from a DHCP server on a remote subnet.
• Typically, DHCP clients broadcast DHCP Discover packets that are then received and answered by a DHCP server on the same subnet.
•  DHCP relay agents intercept DHCP Discover packets and forward them to a remote DHCP server whose address has been preconfigured.
• Although DHCP Relay Agent is configured through Routing And Remote Access, the computer hosting the agent does not need to be functioning as an actual router between subnets. 

Note You cannot use the DHCP Relay Agent component on a computer running any of the following: the DHCP service, the NAT routing protocol component with automatic addressing enabled, or ICS.

Configuring the DHCP Relay Agent

1. Open the Routing And Remote Access console.

2. In the console tree, right-click the General node, and then click New Routing Protocol.

3. In the New Routing Protocol dialog box, click DHCP Relay Agent, and then click OK.

4. Configure the DHCP Relay Agent to point to the address of at least one remote DHCP server through the DHCP Relay Agent Properties dialog box.

To configure global DHCP Relay Agent properties, complete the following steps:

1. Open the Routing And Remote Access console.

2. In the console tree, right-click the DHCP Relay Agent node within IP Routing, and then click Properties.

3. On the General tab, in the Server Address text box, type the IP address of your DHCP server, and then click Add.

4. Repeat step 3 for each DHCP server you need to add, and then click OK.