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Configure BBR on Debian and Ubuntu


kernel version > 4.9

1. Change kernel parameters

echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf

2. Save and apply kernel parameters

sysctl -p

3. Check if BBR is loaded

sysctl net.ipv4.tcp_available_congestion_control


net.ipv4.tcp_available_congestion_control = bbr cubic reno

4. Check if BBR is enable

lsmod | grep bbr


tcp_bbr                20480  28
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