Set BBR Congestion Control

Check Kernel

uname -r

The kernel version should >= 4.9.4, if isn't, please follow the script below to update kernel:

Update Kernel

1. sudo rpi-update
2. sudo reboot

Install BBR

1. sudo bash -c 'echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf'

2. sudo bash -c 'echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf'

3. sudo sysctl -p

4. sudo reboot

Check BBR

sysctl net.ipv4.tcp_available_congestion_control

It might display like this:

net.ipv4.tcp_available_congestion_control = bbr cubic reno

Then use lsmod to check if bbr is running

lsmod | grep bbr

It might display like this:

tcp_bbr 20480 3

Finish