Yes, from the web gui, go to: Servers, DHCP to allow the Contivity to act as your DHCP server (if thats what you want to do with DHCP).
If not, you can also set the Contivity as a DHCP relay agent (to send DHCP requests to an existing DHCP server):
Servers, DHCP Relay.
Web GUI pretty self-explanatory.
I hope that helps.
-HH