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Ubuntu using BBR
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UbuntuCongestionControlBBR.md

Set your Ubuntu Congestion Control to BBR

  1. Check if Ubuntu Linux Kernel version is 4.9

    $ uname -r

  2. 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

  3. Check again the kernel version, make sure again kernel version is 4.9

    $ uname -r

  4. Then confirm the bbr modules is included...

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

  5. 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

  6. 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

  7. You are now using bbr congestion control

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