The DHCP relay agent typically resides in a switch or router configuration. The DHCP server should have the appropriate scopes to serve the remote subnets. If the DHCP server is connected to both subnets, then DHCP relay should not be needed.
If you still need to create a relay agent, have a look at the following pages:
<a href=”http://technet.microsoft.com/en-us/library/cc775972.aspx”>DHCP/BOOTP Relay Agents</a>
<a href=”http://technet.microsoft.com/en-us/library/cc781416.aspx”>Configure the DHCP Relay Agent</a>