What is DHCP Relay ? The DHCP (Dynamic Host Configuration Protocol) is used to assign IP addresses to DHCP clients and also to allocate information about the DHCP. This information includes DNS IPs, subnet mask details, WINS IPs, and default gateway IPs.

The DHCP Relay Agent may be used by a few of the following server systems:

• Windows NT Server
• Windows 2000 Server
• Windows Server 2003

How to enable RRAS (Routing and Remote Access Server)

1. Click the Start button and then go to “All Programs” -> Administrative Tools -> Routing and Remote Access. This will open up the Routing and Remote Access window, where we can continue to change the settings.
2. Now you need to right-click your server node and then choose Configure and Enable Routing and Remote Access to start up the “Routing and Remote Access” wizard.
3. On the first page, click “Next” to continue.
4. You should now see the configuration page. You’ll want to select the “Custom Configuration” option, so place a check and then click “Next”.
5. When you have accessed the “Custom Configuration” page, place a check in the “LAN Routing” checkbox. Now click Next.
6. The summary page will show a verification of everything you did. You may now click “Finish”.
7. It will prompt you to start the service. Click “Yes” to finalize everything.

Installing the DHCP routing protocol…

1. Open up the “Routing And Remote Access” window as before.
2. Click the “+” next to the IP Routing text to show the whole tree.
3. Next you’ll need to right-click the general node and then choose “New Routing Protocol” from the menu. This will open up the “New Routing Protocol” interface.
4. Next all you have to do is select the “DHCP Relay Agent” and click OK.
5. You’re done!

Configuring the DHCP properties…

1. Click the Start button and then go to “All Programs” -> Administrative Tools -> Routing and Remote Access. This will open up the Routing and Remote Access window, where we can continue to change the settings.
2. Now you’ll need to expand the IP Routing section in the tree by clicking the “+” mark.
3. Next you’ll need to right-click the DHCP Relay Agent and then choose “Properties” from the menu.
4. In this new dialog box, click the “General” tab if it is not already selected.
5. Enter in the IP address of the DHCP server that you can see in the “server address” box and then click the “Add” button.
6. Repeat step 5 as necessary until you have added any more DHCP servers that need to be configured.
7. Click “OK” to finish up.

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