R6700v3 disconnects from internet

If you have a seperate modem, such as one from your ISP or one you purchased as a modem only, the R6700v3 needs to be configured as an AP or access point. In the firmware, there is a setting in advanced that will allow you to select Router or AP Mode. You will need AP mode. The nighthawk software app does this for you when first setting up the router by using your smart phone. You don't have to but it's fairly easy vs. trying to log into the router firmware. Your modem has to be turned off, then connect the R6700v3 via CAT cable to the modem then, turn on the modem, then the R6700v3 so that the modem assigns the R6700v3 an IP address. Once that gets done, you should be able to connect to the firmware and make any changes you want to however, AP mode is a must because the R6700v3 is also a modem and no single network can have more than one modem otherwise there are conflicts and nothing will work.