I've got a consulting client that just had their service switched over from standard AT&T DSL to U-verse. In the process, AT&T replaced the modem / router. The new unit that they issued does not have the ability to disable DHCP, which is necessary for this application as there is another DHCP server on the network. This is probably a fairly unique situation, as most routers that I've seen have the ability to disable DHCP, how the hardware manufacturer overlooked this is beyond me. Any suggestions on work-arounds? I had thought about putting a Mikrotik (or other router) in between their switch and the AT&T box and just doing double-nat, but wanted to see if there was a better way. TIA.
-Jason