"Unidentified network" usually means the computer has a physical connection but didn't receive proper settings from the router. Check the cable and port, then renew the IP address. If the computer shows a 169.254 address, the router's DHCP isn't reaching it.
Common causes
No DHCP response
The computer is linked to a switch or wall jack, but the router never answers its address request.
Bad cable, wall jack, or switch port
A damaged cable or dead port can provide a link light without passing data reliably.
Static IP from a different network
A manual address that doesn't match the current network leaves Windows unable to identify it.
Second router or misconfigured device
A consumer router plugged into the office network can hand out wrong addresses and confuse computers.
How to fix it, step by step
- 1
Check the cable and try another port
Swap the patch cable and plug into a different wall jack or switch port to rule out the physical connection.
- 2
Check the IP address
Run ipconfig. A 169.254 address means no DHCP response; an address from an unexpected range points to a rogue router.
- 3
Renew the address
Run ipconfig /release and ipconfig /renew as administrator.
- 4
Set the adapter back to automatic
Make sure IPv4 is set to obtain the IP and DNS addresses automatically.
- 5
Restart the network equipment
Restart the switch and router serving that area of the office.
When to call a technician
If several wired computers show an unidentified network, or the problem started after new equipment was connected, there's likely a switch, cabling, or rogue-router issue. We trace the problem to the exact port or device and fix it.
On-site support across Orange County · see our business networking and WiFi installation services.
Frequently asked questions
Why does Ethernet say unidentified network but WiFi works?
The wired path — cable, wall jack, or switch port — is likely the problem, since the router is clearly working for WiFi devices.
Can a second router cause unidentified network?
Yes. A router plugged in the wrong way can hand out addresses from its own network, which breaks connections for other devices.
Does restarting fix unidentified network permanently?
Only if the cause was temporary. If it returns, the cable, port, or DHCP setup needs to be repaired.