From the navigation pane, double-click IP.
In the IP, click DHCP Relay.
In the DHCP Relay work area, click the DHCP Relay Globals tab.
To enable DHCP Relay globally, select the DhcpForwardingEnabled box.
Configure the other parameters as required.
On the toolbar, click Apply.
On the toolbar, you can click Refresh to verify the global DHCP Relay configuration.