CentOS 8 BBR

Step 1

uname -r
cat /etc/redhat-release
cat /proc/version
sudo rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
sudo rpm -Uvh https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm
sudo yum --enablerepo=elrepo-kernel install kernel-ml -y
rpm -qa | grep kernel
grubby --default-kernel
sudo shutdown -r now
uname -r

Step 2

echo 'net.core.default_qdisc=fq' | sudo tee -a /etc/sysctl.conf
echo 'net.ipv4.tcp_congestion_control=bbr' | sudo tee -a /etc/sysctl.conf
sudo sysctl -p
sudo sysctl net.ipv4.tcp_available_congestion_control
sudo sysctl -n net.ipv4.tcp_congestion_control

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