bbr1

bbr3（适用海外机器）

1. 安装支持bbrv3的内核，可使用该项目：https://github.com/byJoey/Actions-bbr-v3

2. 启用 bbr

编辑/etc/sysctl.d/99-bbr.conf:

net.ipv4.tcp_congestion_control = bbr
net.core.default_qdisc = cake

net.core.rmem_max = 134217728
net.core.wmem_max = 134217728
net.ipv4.tcp_rmem = 4096 87380 67108864
net.ipv4.tcp_wmem = 4096 65536 67108864
net.ipv4.tcp_moderate_rcvbuf = 1

立即生效：sysctl --system

3. 配置cake（本次开机有效，最大带宽填写你实际的值）：

tc qdisc replace dev eth0 root cake \
  bandwidth 1000mbit \
  diffserv4 \
  ack-filter \
  internet

4. cake 持久化

编辑/etc/systemd/system/cake.service（按你实际网卡改 eth0）：

[Unit]
Description=Apply CAKE qdisc
After=network-online.target
Wants=network-online.target

[Service]
Type=oneshot
ExecStart=/sbin/tc qdisc replace dev eth0 root cake bandwidth 1000mbit diffserv4 ack-filter internet
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

启用并立即生效：

systemctl daemon-reload
systemctl enable cake
systemctl start cake