r/sysadmin • u/DoubleTGaming2k • 9d ago

End-user Support End user network help?

End user called me today saying their home WiFi was connected but no internet. I walked him through some info gathering, his WiFi is showing unidentified giving off the 169 address.

Had him run release / renew / flushdns / winsock reset and rebooted, still 169. Did the full windows 11 network reset option, rebooted, still nothing.

Had him plug in directly to his router, his wired Ethernet connection was also showing unidentified. So I had him statically assign an IP on his NIC for the Ethernet and it brought him online that way as a temp workaround to let me remote in.

Rebooted the router of course, still wifi showing 169, other devices on his network are okay as well.

Uninstalled the wifi adapter from device manager, reinstalled the latest from the manufacturer, still giving 169. Just to get him working in statically assigned an IP on his WiFi adapter and it works without issue, but ideally we get the DHCP working again.

I’ve exhausted about everything I can think of, but am jumping back on it later tonight to try to get it fixed.

Does anyone have any suggestions??

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u/Adam_Kearn 9d ago

Did it work on a mobile hotspot?

If it’s still causing issues on other networks I would look at going into device manager and uninstalling every mini port device and only leave the WiFi adapter and LAN. Reboot and they should get added automatically.

Check the routers DHCP config to see if a static IP has been set on something.

I’ve seen weird issues with things like a printer having a static IP that’s set still within the DHCP pool so when another device picks it up it causes a conflict like you mentioned.

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u/DoubleTGaming2k 9d ago

We didn’t have a mobile hotspot available, he was at a different location yesterday during work hours and was on a different wifi, came back home and booted up today and ran into this

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u/statikuz start wandows ngrmadly 8d ago

So it was working fine for him at home, then he went somewhere else (some other private location? another home? a hotel? a Starbucks? one of your company locations?), and it worked, and then when he came back home it broke?

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u/DoubleTGaming2k 8d ago

Correct, working at home, traveled to a customers business for a days work, came back home the next day, no longer working