Directly wiring with ethernet is just simply not working for some reason. The port lights on both devices are not blinking, or even showing yellow. My cloud device is not showing up as a connected device so I don't think it is communicating at all with the router modem combo.
You can also restart your router via the Xfinity app on your smartphone by following these steps: Log in to your Xfinity account and open the Internet menu. Tap on your router and select "Restart this device". Tap "Restart Device" to confirm your decision. Your device will take about 5-10 minutes to restart.
Make sure an Ethernet cable is securely connected between the Data Port on the Optical Network Terminal and the red ONT Broadband port on the back of the gateway. Try a different Ethernet cable. If Ethernet cable is connected to a router or switch: Make sure the router or switch has power; Turn off the router or switch and turn it on again
No Internet on LAN Ports WiFi fully connectivity. The easiest explanation (for wireless working and wired not working) would be that your wireless devices/interfaces are configured to use DHCP to get their network data, but the wired devices/interfaces are configured with manual/static data which are incompatible with the Open a Command Prompt
Unplug the power for a good 60 seconds and restore power. The common issue seems to stem from there. While rebooting the router lets flush the DNS, you can accomplish this by opening the command prompt and type IPCONFIG /FLUSH DNS. Open the command prompt by typing CMD in the search bar.
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router ethernet ports not working
