Apple TV kills C3700 modem/router network

[Luke_H_nyc]

After connecting the AppleTV to my modem/router, the C3700, via Ethernet cable, the network fails shortly thereafter

the modem router combo works flawlessly otherwise. It is only after the direct connection to Apple TV where it fails. Both wifi channels, 2.5 and 5 ghz, are visible. But I cannot connect to either. 

Firmware on Apple TV is up to date. I believe the modem firmware also up to date. Any suggestions?

[DarrenM]

Hello Luke

You may want to try and go back to a older firmware to see if its a firmware issue in the router also try another Ethernet cable. Hope to hear your feedback 

DarrenM