1) I have a ATT Uverse 2Wire i3812V
2) I also have Cisco RV220W.
I need RV220W to sit behind 2Wire and provide Internet access.
3) I setup RV220W to DHCP and connected RV220W WAN port to 2Wire Ethernet port.
4) I set the 2Wire so that RV220W connection is treated as DMZ+.
With this setup, if I leave RV220W with DHCP (in WAN interface), RV220W does not get any IP or DNS information from 2Wire. This means there is no access to Internet.
When I change RV220W to use static IP address and enter all the information (IP, DNS, etc.) then everything works fine.
It almost seems like when RV220W makes a DHCP request, 2Wire is not responding.
4) The DHCP for WAN interface was working until couple of days ago.
5) The 2Wire is serving DHCP when other clients directly connect to it.
On the 2Wire there is a option to set a device into DMZPlus. Here is the verbage around that option. I follwed the instructions.
Allow all applications (DMZplus mode) - Set the selected computer in DMZplus mode. All inbound traffic, except traffic which has been specifically assigned to another computer using the "Allow individual applications" feature, will automatically be directed to this computer. The DMZplus-enabled computer is less secure because all unassigned firewall ports are opened for that computer.
Note: On LAN devices which have a Private IP address, once DMZplus mode is selected and you click save, the system will issue a new IP address to the selected computer. The computer must be set to DHCP mode to receive the new IP address from the system, and you must reboot the computer. If you are changing DMZplus mode from one computer to another computer, you must reboot both computers.
Can anyone help me so that DHCP option for RV220W works by configuring both the devices properly?
Thank you very much