Ubuntu18.04 install Google BBR

Description: Ubuntu 18.04 released a few days ago, the big change, the kernel also going directly to the official version 4.15, but BBR core requirements of 4.9, that meets, so we do not need to change the kernel can quickly turn BBR here simply the next method.

Tip: Ubuntu 18.10 still can be opened using this method BBR, while for 19.04, an official-looking you directly to open the BBR, do not need to repeat opened.

 

BBR installation:

　　　　

wget –no-check-certificate https://github.com/teddysun/across/raw/master/bbr.sh
chmod +x bbr.sh
./bbr.sh

 

 If the kernel version does not meet the requirements will be prompted to change the kernel, follow the prompts to go just fine, and then restart the machine can be installed

 

 

Method
1, modified system variables

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

2, save the entry into force

sysctl -p

3, to see whether the kernel is on BBR

sysctl net.ipv4.tcp_available_congestion_control

Already open to display the following:

# sysctl net.ipv4.tcp_available_congestion_control
net.ipv4.tcp_available_congestion_control = bbr cubic reno

4, to see whether the start BBR

lsmod | grep bbr

That following the successful launch:

# lsmod | grep bbr
tcp_bbr 20480 14

 

Method
1, modified system variables

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

2, save the entry into force

sysctl -p

3, to see whether the kernel is on BBR

sysctl net.ipv4.tcp_available_congestion_control

Already open to display the following:

# sysctl net.ipv4.tcp_available_congestion_control
net.ipv4.tcp_available_congestion_control = bbr cubic reno

4, to see whether the start BBR

lsmod | grep bbr

That following the successful launch:

# lsmod | grep bbr
tcp_bbr 20480 14