BBR2 congestion algorithm cripples WinSCP throughput in Windows 11
Windows 11 supports BBR2 congestion algorithm that can be enabled with the following commands and a reboot:
It works as it should for most applications, but enabling it cripples WinSCP 6.X throughput to an extreme degree. It affects both SSH and SFTP protocols, but only WinSCP is affected. It doesn't cripple throughput when used with PuTTY 0.78+. Any ideas?
netsh int tcp set supplemental Template=Internet CongestionProvider=bbr2 netsh int tcp set supplemental Template=Datacenter CongestionProvider=bbr2 netsh int tcp set supplemental Template=Compat CongestionProvider=bbr2 netsh int tcp set supplemental Template=DatacenterCustom CongestionProvider=bbr2 netsh int tcp set supplemental Template=InternetCustom CongestionProvider=bbr2
