Ethernet isn't functioning properly, yet Wi-Fi operates correctly.
Ethernet isn't functioning properly, yet Wi-Fi operates correctly.
Hi, I'm experiencing some internet issues recently and wanted to seek your assistance. As noted in the title, the Wi-Fi works properly, but Ethernet isn't functioning. The router's indicator LED appears normal, and the switch connected to it shows green blinking lights, which seems correct. When the Ethernet connection fails, the computers still show "No Internet" on all devices. I've double-checked every cable for damage and even used an Ethernet tester to confirm proper connections. All cables are DIY, but nothing seems faulty. Thanks for your help!
I’d consider updating the drivers or inspecting the Ethernet port for bent pins. If those steps don’t help, I’d revert to reinstalling Windows after backing up.
Switch and router specifications: What model are you using? Did you attempt to reset all network devices, including the modem, before restarting?
Sorry for the delayed reply. I attempted to update drivers on my personal PC, but the problem persists. It seems to occur across three computers, suggesting a potential switch or router issue. The router is a Zyxel VGM8825-T50 and the switch is a TP-Link TL-SG105. Turning everything off and on again resolves it, though it can happen occasionally. Yesterday it was down all afternoon, but after restarting it worked again and hasn’t been an issue since. This has happened about three times in roughly a week—previously the Ethernet had died while Wi-Fi remained functional.
In general, I’d describe this as a surge in network activity, often indicated by ports displaying similar status without any real data flowing. This behavior usually means the router’s CPU is managing traffic effectively, likely blocking such patterns. Understanding the exact cause and method remains challenging. For instance, after updating my surround receiver’s firmware, it interfered with LAN performance on the same network. Try disconnecting other devices to see if the issue persists—this can help pinpoint the problematic client.