check BBR process

lsmod | grep bbr

if there is nothing, then run

modprobe tcp_bbr
echo "tcp_bbr" >> /etc/modules-load.d/modules.conf

execute

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

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

save and enable

sysctl -p

查看是否开启成功

sysctl net.ipv4.tcp_available_congestion_control

sysctl net.ipv4.tcp_congestion_control

asdf

lsmod | grep bbr