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AxelB-6261 asked saldana-msft edited

LEDBAT disabling itself every hour on SCCM 2103 primary site server

Hello,

I noticed while trying to enable LEDBAT on a Distribution Point collocated on a site server that it keep disabling itself every hour.

When enabling it: distmgr.log shows LEDBAT beeing enabled
Running Get-NetTCPSetting and get-NetTransportFilter shows that LEDBAT have been succesfully configured as congestion provider for the InternetCustom template, this template is used in 2 transport filter (TCP 443 + TCP 80)

One hour later, the congestion provider for the InternetCustom template is restored to it's default value (CTCP on windows server 2016) and the 2 transport filters have disappear.

Digging a bit, I ended up finding in the Windows Powershell log that every hour, the 2 following commands are running:
- powershell.exe -Command Remove-NetTransportFilter -SettingName InternetCustom -Confirm:$false
- powershell.exe -Command Set-NetTCPSetting -SettingName InternetCustom -CongestionProvider Default

Using procmon, these powershell commands are created by the smsexec process. immediately before and after these powershell command something is written in WCM.log, which contains
127682-image.png

Details about the SCCM infrastructure:
- OS Server 2016: CAS + SUP
- OS Server 2016 : Primary site + SUP + DP
- OS Server 2012R2 : DP

SCCM version : 2103 + HFRU KB10036164
Subsequent HFRU does not seems to fix what I'm facing.

Any thoughts?







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