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iguoli/BBR.MD

Last active June 30, 2021 02:13
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开启BBR加速
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BBR.MD

Ubuntu下开启BBR

1. Linux内核需要更新到4.9以后的版本，使用uname -r查看系统内核版本

  • sudo apt install linux-image-<tab>安装最新的内核映像
  • update-grup上一步会自动执行此命令，因此此命令可以不用手动运行
  • reboot
  • sudo apt purge linux-image-<tab>删除掉旧内核映像

2. 修改内核参数，开启BBR

  • echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
  • echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf
  • sudo systcl -p

3. 检查内核是否开启BBR

  • sysctl net.ipv4.tcp_available_congestion_control
  • sysctl net.ipv4.tcp_congestion_control

输出结果应包含bbr，同时使用命令lsmod | grep bbr查看tcp_bbr模块是否已加载

@boilfish
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systcl -> sysctl

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