Hello!
I just went through the unfortunate, painstaking process of getting my AT&T-provided, must-be-used-in-front-of-your-own-router (Arris BGW210-700), into DCHP and IP Passthrough mode in conjunction with my Nighthawk XR500 router.
The Arris is functioning for DCHP Server. The XR500 is meant to be the router.
Oddly, although both SSID's are showing, my computers say "can't connect to this network" and my phones get stuck while "obtaining an IP".
Any ideas on what could be causing this?
To note, the laptop I've been using to Ethernet into the routers WAS able to connect to the WiFi and took the password as usual. The laptop was Ethernet-connected to the XR500, but it didn't show the hard line network connection. Not sure if that occurrence helps.
UPDATE: I had to change the passkey to the XR500 SSID's. This kicked me out of Duma on the laptop. As of now, regardless of whether I attach an Ethernet cord from the laptop to the XR500, or not, it still won't let me join the network. If I revert back to the Arris-powered wifi, I still can't access the XR500 Duma/settins (whether by routerlogin.net or the direct IP).