BBR configuration guide

Check the available congestion control algorithms:

sudo sysctl net.ipv4.tcp_available_congestion_control

Expected output:

net.ipv4.tcp_available_congestion_control = reno cubic

Check the current congestion control algorithm:

sudo sysctl net.ipv4.tcp_congestion_control

Expected output:

net.ipv4.tcp_congestion_control = cubic

Open /etc/sysctl.conf:

sudo nano /etc/sysctl.conf

Add the following lines at the end of the file:

net.core.default_qdisc=fq
net.ipv4.tcp_congestion_control=bbr

Save and exit, then apply the configuration by running:

sudo sysctl -p

Expected output:

net.core.default_qdisc = fq
net.ipv4.tcp_congestion_control = bbr

Verify BBR is enabled:

sudo sysctl net.ipv4.tcp_congestion_control

Expected output:

net.ipv4.tcp_congestion_control = bbr

References