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. Be sure your using CAT6 patch cables. CAT5 does not support 1000Mpbs. Try a different PC or laptop connected to the LAN ports. Don't connect anything to the Multigig port for now. Be sure your ISP has setup and activated the modem on there system. You'll have to contact them about this. View solution in original post. My Ethernet does not work, but my Wi-Fi works fine. My modem is an Arris DG1670. Here's my set-up: My modem is connected to my desktop via a USB to Ethernet adapter because my Ethernet port on my desktop is broken (it has been broken for quite some time). I do not have a router. My Wi-Fi comes from the modem provided by my ISP (Spectrum). Press Win + R, type ncpa.cpl, and press Enter. Check the Ethernet connection here. If it is disabled, right-click it and select Enable. Additionally, we also recommend doing the same via the BIOS. Here are the necessary steps: Restart your computer and press the BIOS Setup Key shown on the screen (Fn keys or Del). Rebooting the router does not help. Manufacturer ARRIS Model Number BGW210-700. Sometimes my ethernet ports stop working and go offline until I login to the router and set them to 1gig full. Then after a few hours they go offline again until I set them back to auto. Rebooting the router does not help. If it doesn't work try each of the LAN ports, if it isn't working for any of them, while connected to the router via a Windows PC, open command prompt, type ipconfig press enter and then post a screenshot of the results here please. Message 10 of 16. 0 Kudos. Reply. crmontoy1. Apprentice. erMNCL.

router ethernet ports not working