chalos/UbuntuCongestionControlBBR.md

Last active January 6, 2017 11:06

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Ubuntu using BBR

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UbuntuCongestionControlBBR.md

Set your Ubuntu Congestion Control to BBR

Check if Ubuntu Linux Kernel version is 4.9
```
$ uname -r
```
If not, follow the link http://www.yourownlinux.com/2016/12/how-to-install-linux-kernel-4-9-0-in-linux.html instructions to update your Ubuntu Linux Kernel to 4.9
Check again the kernel version, make sure again kernel version is 4.9
```
$ uname -r
```

Then confirm the bbr modules is included...

$ ls -a /lib/modules/$(uname -r)/kernel/net/ipv4 | grep bbr
tcp_bbr.ko

Grep to see the congestion control currently using in Ubuntu, for me, my default is using cubic
```
$ cat /proc/sys/net/ipv4/tcp_congestion_control
cubic
```

Change the setting of tcp_congestion_control by echo, i did that in root

$ sudo -i
$ echo "bbr" /proc/sys/net/ipv4/tcp_congestion_control
$ cat /proc/sys/net/ipv4/tcp_congestion_control
bbr

You are now using bbr congestion control

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