DHCP for remote sites

what you are looking is DHCP relay

I am using relay. My setup is my cisco 1811 wich is my DHCP server. The cisco is connected to another router wich is acting as a relay for the LAN subnet it is on. The problem is that i cant have my cisco box lease addresses throug the relay if I dont have an address from the dhcp pool (for the remote site), on an interface on my cisco. And that just dont make sense to me. I dont want to use the same subnet or even a single adress from the remote site on my cisco. I just want it to relay addresses to the remote site. The error I get when I debug "Debug ip dhcp server event" is something like, there is no address pool for the wan address of my remote router. Hope I am making sense, I am writing this in a hurry. Cheers, Hafsteinn

The relay needs to populate the DHCP GIADDR field with the IP address of the interface on which the ip helper-address was configured. DHCP servers use the GIADDR field to look up the DHCOp scope ( pool)

You should be able without any issue, if is not working please provide the output for the dhcp debugs including the ones from the relay agent and the IOS version.