I have a CG7500 doing the same thing. Wifi continues to run, but everything attached to the hardware ports says "no connection" until I restart the router. I purchased a new router (same model), same issue. It's nothing on the network, as I've isolated each device and left only one device connected, and it fails in the same way no matter what network device is connected, either singly or in a group (Security system, DVR, Xbox One, Linksys router in bridge mode, Samsung printer, Brother printer, smart TV). I am running no 'exotic' network setup... straight IPv4. The ethernet port activity lights on the router are on and flashing like the network is running, but the connected devices report no connection.... and the Wifi is running & passing data just fine when the ports are out. Nothing changes this condition except power-cycling the device and waiting for it to reconnect... then everything works fine until it craps out again. Annoying, to say the least.
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