Created
September 8, 2025 14:46
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TCP Optimizer Configuration for Windows 11
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| [netsh] | |
| AutoTuningLevelLocal=4 | |
| ScalingHeuristics=2 | |
| CongestionProvider=-1 | |
| ReceiveSegmentCoalescing=1 | |
| ReceiveSideScaling=1 | |
| Large Send Offload=1 | |
| Checksum Offload=1 | |
| EcnCapability=1 | |
| Chimney=2 | |
| Timestamps=1 | |
| MaxSynRetransmissions=3 | |
| NonSackRttResiliency=2 | |
| InitialRto(ms)=1000 | |
| MinRto(ms)=300 | |
| [SOFTWARE\Microsoft\Internet Explorer\MAIN\FeatureControl\FEATURE_MAXCONNECTIONSPER1_0SERVER] | |
| explorer.exe=8 | |
| iexplore.exe=8 | |
| [SOFTWARE\Microsoft\Internet Explorer\MAIN\FeatureControl\FEATURE_MAXCONNECTIONSPERSERVER] | |
| explorer.exe=4 | |
| iexplore.exe=4 | |
| [SYSTEM\CurrentControlSet\Services\Tcpip\ServiceProvider] | |
| LocalPriority=499 | |
| HostsPriority=500 | |
| DnsPriority=2000 | |
| NetbtPriority=2001 | |
| [SOFTWARE\Policies\Microsoft\Windows\Psched] | |
| NonBestEffortLimit=-2 | |
| [System\CurrentControlSet\Services\Tcpip\QoS] | |
| Do not use NLA=-2 | |
| Do not use NLA_SEL=0 | |
| [SOFTWARE\Microsoft\Windows NT\CurrentVersion\Multimedia\SystemProfile] | |
| NetworkThrottlingIndex=-1 | |
| NetworkThrottlingIndex_SEL=0 | |
| SystemResponsiveness=10 | |
| SystemResponsiveness_SEL=10 | |
| [SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters] | |
| Size=3 | |
| Size_SEL=3 | |
| [SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management] | |
| LargeSystemCache=1 | |
| LargeSystemCache_SEL=1 | |
| [SYSTEM\CurrentControlSet\Services\Tcpip\Parameters] | |
| MaxUserPort=-1 | |
| TcpTimedWaitDelay=30 | |
| DefaultTTL=-1 | |
| [SOFTWARE\Microsoft\MSMQ\Parameters] | |
| TCPNoDelay=1 | |
| TCPNoDelay_SEL=1 | |
| [Local Area Connection] | |
| MTU=0 | |
| [SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{CB57A929-DFC3-4386-BB75-60F1C672A60B}] | |
| TcpAckFrequency=-2 | |
| TcpAckFrequency_SEL=0 | |
| TcpDelAckTicks=-2 | |
| TcpDelAckTicks_SEL=0 | |
| TCPNoDelay=-2 | |
| TCPNoDelay_SEL=0 | |
| [Ethernet] | |
| MTU=1500 | |
| [SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{8ACAC875-6913-43C7-80DE-4051E8B98018}] | |
| TcpAckFrequency=-1 | |
| TcpAckFrequency_SEL=0 | |
| TcpDelAckTicks=-1 | |
| TcpDelAckTicks_SEL=0 | |
| TCPNoDelay=-1 | |
| TCPNoDelay_SEL=0 | |
| [WiFi] | |
| MTU=1500 | |
| [SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{E44FD87E-5169-4839-98D4-6B46D75DBCC0}] | |
| TcpAckFrequency=-1 | |
| TcpAckFrequency_SEL=0 | |
| TcpDelAckTicks=-1 | |
| TcpDelAckTicks_SEL=0 | |
| TCPNoDelay=-1 | |
| TCPNoDelay_SEL=0 |
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| :: BBR2 is broken prior to 25H2 (or particularly, 26100.3915). Use CTCP instead, if on an older version of Windows. | |
| 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 |
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