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🗣 Wd提问: vps bbr

🤖 Ai回答:
BBR (Bottleneck Bandwidth and Round-trip propagation time) is a congestion control algorithm developed by Google、It aims to improve the performance of TCP connections by better utilizing bandwidth and reducing latency、Here’s how you can enable BBR on your VPS:

Step 1: Check Kernel Version
First, ensure that your kernel version is 4.9 or higher、BBR was introduced in Linux kernel version 4.9.

bash
uname -r

If your kernel version is lower than 4.9, you will need to update it、The method for updating the kernel depends on your Linux distribution.

Step 2: Enable BBR
Edit the `/etc/sysctl.conf` file to add the necessary settings for BBR.

bash
sudo nano /etc/sysctl.conf

Add the following lines at the end of the file:

plaintext
net.core.default_qdisc = fq
net.ipv4.tcp_congestion_control = bbr

Save and exit the editor.

Step 3: Apply Changes
Run the following command to apply the changes:

bash
sudo sysctl -p

Step 4: Verify BBR is Enabled
To verify that BBR has been enabled, run the following commands:

Check if BBR is loaded as a kernel module:

bash
lsmod | grep bbr

You should see an output similar to:

plaintext
tcp_bbr 20480 16

Check if BBR is set as the default congestion control algorithm:

bash
sysctl net.ipv4.tcp_available_congestion_control
sysctl net.ipv4.tcp_congestion_control

The output for `net.ipv4.tcp_congestion_control` should be:

plaintext
net.ipv4.tcp_congestion_control = bbr

And the output for `net.ipv4.tcp_available_congestion_control` should include `bbr`.

Conclusion
With these steps, you have successfully enabled BBR on your VPS、This should help improve the network performance of your server, especially in high-latency or high-bandwidth environments.

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