How to enable BBR in the kernel

1. Modify system variables
Echo "net. Core. default_qdisc = FQ">/etc/sysctl. conf
Echo "net. ipv4.tcp _ congestion_control = BBR">/etc/sysctl. conf

2. Save and take effect
Sysctl-P

3. Check whether BBR is enabled in the kernel.
Sysctl net. ipv4.tcp _ available_congestion_control
It is enabled as follows:
# Sysctl net. ipv4.tcp _ available_congestion_control
Net. ipv4.tcp _ available_congestion_control = BBR cubic Reno

4. Check whether the BBR is started.
Lsmod | grep BBR
The startup is successful as follows:
# Lsmod | grep BBR
Tcp_bbr 20480 14

How to enable BBR in the kernel