Windows TCP 拥塞控制算法

BBR

• https://zhuanlan.zhihu.com/p/543011535
• https://github.com/google/bbr

说明：WIN10专业版，前几日访问油管connection speed一直缓冲，换一台电脑马上速度飙到几万，另外也有童鞋提醒跟本地网络有关。经过1天多的各种尝试，终于找到解决方案，就是调节了TCP 全局参数 ，现在的速度提升50%。现提供方法给大家参考。

管理员运行cmd，运行以下命令：

netsh int tcp show global 


TCP 全局参数
----------------------------------------------
接收方缩放状态          : enabled
接收窗口自动调节级别    : normal
加载项拥塞控制提供程序  : default
ECN 功能                      : disabled
RFC 1323 时间戳                 : enabled
初始 RTO                         : 1000
接收段合并状态    : enabled
非 Sack Rtt 复原             : disabled
最大 SYN 重新传输次数             : 4
快速打开                           : enabled
快速打开回退                  : enabled
HyStart                             : enabled
比例费率降低         : enabled
节奏配置文件                      : off

修改以下几项，解决了网速慢的问题，命令都是在CMD中输入，然后重启。

直接缓存访问(DCA)：

netsh int tcp set global dca=enabled

接收窗口自动调谐级别：

netsh int tcp set global autotuninglevel=normal

附加拥塞控制提供程序

netsh int tcp set supplemental template=internet congestionprovider=ctcp

RFC 1323 时间戳：

netsh int tcp set global timestamps=enabled

Benchmark of BBR

https://arxiv.org/pdf/1810.13241.pdf

---

Linux上有bbr，windows上也有ctcp

使用管理员模式在命令模式下运行

netsh int tcp set supplemental template=internet congestionprovider=ctcp

xxxxxxxxxx [[email protected] ~]# ifconfigeth0: flags=4163 mtu 1500       inet 192.168.10.11 netmask 255.255.255.0 broadcast 192.168.10.255       inet6 fe80::250:56ff:fe29:eae prefixlen 64 scopeid 0x20       ether 00:50:56:29:0e:ae txqueuelen 1000 (Ethernet)       RX packets 86 bytes 10889 (10.6 KiB)       RX errors 0 dropped 0 overruns 0 frame 0       TX packets 95 bytes 10828 (10.5 KiB)       TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0​lo: flags=73 mtu 65536       inet 127.0.0.1 netmask 255.0.0.0       inet6 ::1 prefixlen 128 scopeid 0x10       loop txqueuelen 1000 (Local Loopback)       RX packets 0 bytes 0 (0.0 B)       RX errors 0 dropped 0 overruns 0 frame 0       TX packets 0 bytes 0 (0.0 B)       TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0text

默认是下面的cubic。现在运行下命令就改成了ctcp

img

另外我看了下 powershell下面可以用下面的命令，好像是因为新系统下面netsh命令已经没用了

Set-NetTCPSetting -SettingName “InternetCustom” -CongestionProvider CTCP -InitialCongestionWindowMss 6

img

显示windows所有TCP设置参数

在CMD命令行输入以下命令 netsh int tcp show global

C:\Users\admin>netsh int tcp show global
查询活动状态...

TCP 全局参数
----------------------------------------------
接收方缩放状态                    : enabled
烟囱卸载状态                      : automatic
NetDMA 状态                       : enabled
直接缓存访问(DCA)                 : enabled
接收窗口自动调谐级别              : normal
附加拥塞控制提供程序              : ctcp
ECN 功能                          : disabled
RFC 1323 时间戳                   : enabled

TCP优化设置命令

直接缓存访问(DCA)：netsh int tcp set global dca=enabled
接收窗口自动调谐级别：netsh int tcp set global autotuninglevel=normal
附加拥塞控制提供程序：netsh interface tcp set global congestionprovider=ctcp
win10附加拥塞控制：netsh int tcp set supplemental template=internet congestionprovider=ctcp
RFC 1323 时间戳：netsh int tcp set global timestamps=enabled

一定要关闭ECN

ECN为显式拥塞通知. 启用ECN可以告知对方主机拥塞状况,好处是让网络曲线更平滑. 然而,大多数主机并没有启用ECN,一旦启用就会增加等待超时时间,反而降低了网络性能 netsh int tcp set global ecn=disable

Setting

netsh int ip set global congestprovider=CTCP

Set-NetTCPSetting -SettingName "InternetCustom" -CongestionProvider CTCP -InitialCongestionWindowMss 6

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Nsi\{eb004a03-9b1a-11d4-9123-0050047759bc}\0]
"0200"=hex:00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,02,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,ff,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
ff,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
"1700"=hex:00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,02,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,ff,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
ff,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00

https://www.speedguide.net/forums/showthread.php?291853-Bypass-Windows-10-Restrictions-(Templates-CongestionProvider)-etc

BBR2

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

Registry

https://www.speedguide.net/articles/windows-10-manual-tcpip-registry-tweaks-7507

References

• https://techcommunity.microsoft.com/t5/networking-blog/windows-transport-converges-on-two-congestion-providers-cubic/ba-p/339819

• https://lxadm.com/netsh-int-tcp-set-global-congestionprovider-ctcp/

• https://learn.microsoft.com/en-us/powershell/module/nettcpip/set-nettcpsetting?view=windowsserver2022-ps

• https://www.oocolo.com/886.html

• https://www.azurew.com/windows/windows-server-2016/8703.html

• https://itren.org/501.html

• https://www.haah.net/archives/8817.html

• https://stackoverflow.com/questions/60159716/how-to-enable-tcp-bbr-on-windows/75556970#75556970

• https://islun.com/660/