Ethernet keeps disconnecting

Anonymous
2022-02-12T00:05:30+00:00

So I just got a new PC, everything works smoothly, however whenever I try to plug in my ethernet, it'll connect for a random amount of time (few hours or few days) and then mysteriously it disconnects.

I try unplugging and replugging it into my PC but with no results. Only when I remove it from the router and replug it in to a different port does it finally connect, but this is only a temporary solution.

Any ideas?

Drivers don't need updating, I've already checked.

Windows for home | Windows 10 | Internet and connectivity

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  1. Anonymous
    2022-09-09T13:18:39+00:00

    Was the usual connection reproducible? We noticed no issues when connecting a device directly to Ethernet. It is when there is a dock involved. That's when we get Ethernet issues.

    Does your ethernet issue happen at home, in an office, or both?

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  2. Anonymous
    2022-09-09T13:22:14+00:00

    It's not a WAN issue. It's an industrial firewall that my company owns which is connected to a Cisco router provided by our ISP for a business-class Internet connection. I've spent hours between back and forth emails and phone calls with the paid support team we have for our firewall, if it was disconnecting they certainly would have picked that up right away and, frankly, I would have too.

    Yesterday I ran a ping test to verify whether the VLAN (which is LAN-side not WAN-side) disconnects reported by Unifi were actually affecting anything. They aren't. I let the ping run for an hour or so (over 3000 packets) none dropped and the highest latency spikes were only +10ms and there were only 2 or 3 out of the entire 3000 packets sent, the rest of the replies came in within 1ms of each other. I suspect that the Unifi controller is reporting this inaccurately because our firewall isn't a Unifi product and is seen by the switch and controller as just another client device.

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  3. Anonymous
    2022-09-09T14:06:34+00:00

    Same here. I received a brand new Lenovo X1 Yoga 7th gen preinstalled with Windows 11 Pro and I’ve never been able to connect directly to my router. My old machine, which is a Lenovo X1 Yoga 3rd gen and uses Windows 10, has no problem with Ethernet connectivity.

    I’m using a USBC to Ethernet, not a docking station, and I’ve tried several different adapters, which all work with my old machine that uses Windows 10.

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  4. Anonymous
    2022-09-23T17:51:28+00:00

    Our organization seems to have figure out the issue, however we don't have a fix. It seems to be related to Windows 11.

    If a device has Windows 11 and is connected to Ethernet via a docking station, USB to Ethernet Adapter to a network that HAS VLANs, there will be Ethernet connectivity problems. However, if the Windows 11 Machine HAS a native Ethernet port, then there is no issue.

    If a Windows 11 device is connected to Ethernet via a docking station, USB to Ethernet Adapter to a network WITHOUT VLANs, then there are not any Ethernet connectivity problems.

    We do not have any issues with Ethernet no matter the method when the machine is running Windows 10. Regardless if VLANs/Docking Stations/USB to Ethernet Adapters are in play.

    Long story short - Windows 11 does not work with Ethernet Adapters/Docking Stations on Networks that have VLANs.

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  5. Anonymous
    2022-09-28T14:42:52+00:00

    The way I fixed it was by rolling back to a previous version of my Realtek network adapter driver.
    Here's my driver:
    Image

    The version that caused this issue for me was:

    1153.6.418.2022 (there could be other versions that are having this same issue)

    Dated: 4/19/2022

    The version I rolled back to which fixed the problem for me was:
    10.38.117.2020
    Dated: 9/26/2015

    Could be other newer versions that fix the problem but this worked for me and I've already wasted to much time trying to troubleshoot it.

    Hopefully this helps!

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