linux自内核4.19开始系统自带bbr加速,不过并未开启.本文简述下如何开启.
1、修改系统变量

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

2、保存生效

sysctl -p

3、查看内核是否已开启BBR

sysctl net.ipv4.tcp_available_congestion_control

显示以下即已开启：
net.ipv4.tcp_available_congestion_control = reno cubic bbr

4、查看BBR是否启动

lsmod | grep bbr

显示返回值即启动成功：
root@yjyj:~# lsmod | grep bbr
tcp_bbr                20480  1

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