XR500 + CGM4140COM from Xfinity - Disconnects internet every 5-10 minutes then comes back.

[trvshady]

My firmware is up to date and both the XR500 router and the Xfinity modem are brand new. Not sure why but the internet will cut out every 5-10 minutes although the internet light stays on on the router. It will eventually come back on by itself. Both my PC (Wired) and iPhones (WiFi) lose connection.

I have unplugged and restarted both the modem and router multiple times.

Any help would be greatly appreciated. Thanks!

[plemans]

that modem is a modem/router combo device. 

Have you put the netgear's IP address into the modem/router's DMZ

[Netduma-Fraser]

In LAN Settings set the DHCP range to start at .50, then assign reserved IP addresses to devices between .2 & .49 so they're out of the DHCP range, apply, reboot from the interface, wait 2 minutes and see if that stops the disconnects.