Read the symptom before changing settings
| What you observe | Where to focus |
|---|---|
| No link lights | Test another known-good cable and router or switch port. |
| Unidentified network | Check DHCP, IP assignment and network profile. |
| Ethernet works after adapter restart | Driver or power-state instability is likely. |
| Wi-Fi works but Ethernet never appears | Inspect the Ethernet adapter, dock and manufacturer driver. |
Prove the cable, port and adapter link
Reconnect both ends until they click. Check the Ethernet LEDs on the computer, USB adapter, dock, router or switch. Test a known-good cable and a different router port. A damaged cable can link at a lower speed or disconnect when moved.
If Ethernet runs through a USB-C dock, connect the dock directly, remove unnecessary USB devices and install the dock maker’s supported firmware and network driver. Test a direct onboard port when available.
1Check Windows network status
- Open Settings > Network & internet > Ethernet.
- If Ethernet is disabled under Advanced network settings, enable it.
- If Windows reports Unidentified network, continue to the IP check instead of changing DNS randomly.
2Compare with another connection
- Connect the PC temporarily through Wi-Fi.
- If Wi-Fi also fails, investigate the router or broader Windows network stack.
- If Wi-Fi works, focus on the cable, Ethernet adapter, dock and its driver.
Check addressing and refresh the connection
Run ipconfig in Terminal. A 169.254 address indicates that the Ethernet adapter did not obtain an address from DHCP. Restart the router or switch you control, then disable and re-enable the Ethernet adapter.
If the network requires a static IP, do not switch it to automatic without recording the assigned address, gateway and DNS details. Business networks may block unknown devices by policy.
1Run Microsoft’s standard network commands
- Open Terminal as administrator.
- Run
netsh winsock reset,netsh int ip reset,ipconfig /release,ipconfig /renew, thenipconfig /flushdns. - Restart Windows and test. Skip release/renew on a deliberately static configuration.
2Repair the correct Ethernet driver
- Open Device Manager > Network adapters.
- Update from the computer, dock or adapter manufacturer.
- If the problem began after a driver update, use Roll Back Driver when available.
Reinstall or reset only as the final Windows step
Before uninstalling the Ethernet adapter, download its manufacturer driver on another device and copy it locally. After uninstalling, restart; Windows often reinstalls the adapter automatically.
Network reset can help after upgrades or broken adapter configuration, but Microsoft recommends it as a last step. It removes network adapters and returns their settings to defaults.
Frequently asked questions
Why does Ethernet say Unidentified network in Windows 11?
Windows may not have received a valid IP address or gateway, the network may require authentication, or a static configuration may be wrong. Check ipconfig and the network’s requirements.
Can DNS cause the Ethernet cable to show disconnected?
No. DNS operates after a physical link and IP connection exist. A disconnected cable status points to the cable, port, dock, adapter or driver.
Should I uninstall the Ethernet driver?
Only after cable, port, adapter status and update or rollback checks fail—and only after saving the correct manufacturer driver locally.
Related Windows 11 network fixes
Official references
For platform-specific behavior and recovery options, compare this guide with the current documentation from the relevant official source.