Issue with Windows 11 24H2 and TCPO

[Naidu]

Hello,

After upgrading to 24H2, I am running into an odd issue. I cannot access local APIs like Plex (Local Server) or the Steam Windows app. Problems get resolved when I apply TCPO and come back when I revert to Windows default. I tried to reset Winsock and TCP/IP, but that didn't help. Note: I was using TCPO optimal settings before upgrading to TCPO.

Does anyone know what might be causing this? I suspect it's one of the registry changes.

Thanks

[Naidu]

Seems like issue was caused by changing to BBR. must be a bug in 24H2.

[Philip]

Interesting that BBR caused this, thanks for following up.

There used to be a an issue where changing the TCP Auto-tuning algorithm from "normal" to "experimental" caused similar issues with LAN shares and Windows Servers' local network access, but in your case this is something new.

[Naidu]

Fyi, I would also recommend adding:

netsh int tcp reset all

To the following article: https://www.speedguide.net/articles/how ... nsock-1539

It seemed to reset the congestion control.

[Philip]

Added. Congestion control default may be different depending on the OS build though.

[erpguy2]

I read this from this guy's blog - Windows TCP/IP implementation: Reset can increase network performance
borncity.eu ... [link removed by admin]


btw, Windows 11 24H2 was publicly released on the first day of October, along with 24H2 (2024 update) ISO image downloads posted.

[Philip]

Resetting TCP/IP and Winsock should not be necessary to increase network performance, but is it an option in the "File" menu of the TCP Optimizer.