We have two different subnets separated by a router. Trouble is company has an old router, 2620 doesn't support VLAN's, so I just implemented two different subnet ranges, and secondary address on our one horse one ethernet port router, lol. Now clients are getting IP's from the wrong DHCP server. Origianlly I thought it might be DHCP relay enabled on the router, turned it off. But if a client doesnt have an IP address, the servers or the router wouldn't know to which subnet it belongs. Is there a way out without upgrading router to support vlans? I know assigning vlans to ports would eliminate this problem.