LLDP in Windows 11 build 22H2 triggers an STP shutdown on the network switch
I work in an office environment. We are testing 22H2 build of Windows 11. After a successful upgrade, computers in our lab will lose their internet connections.
After some investigation, we noticed that the network switch each computer was connected to had disabled the port. It was disabled by STP because it saw BPDUs on the port. This is normal behavior from the switch. It should not expect BPDUs from a Windows computer. These only come from other network switches.
If we turn LLDP off on the computer's ethernet connection, this problem goes away. We can also turn off BPDU-Guard on the switch to prevent this, but neither workaround is ideal.
This is a very easily reproduceable bug. We are using an Aruba switch, but other users have reported it on Brocade as well: https://www.reddit.com/r/networking/comments/ugw3na/bpdu_issues_in_windows_11/
- From what you explained it seems like a bug.
I advise you to open start and search for feedback and open the Feedback Hub app and report this issue.
Make sure share steps to reproduce the problem and expected result and actual result.