how to enable bbr in rocky linux 9

To enable BBR (Bottleneck Bandwidth and Round-trip propagation time) in Rocky Linux 9, follow these steps:

1. Open a terminal or connect to your Rocky Linux 9 server via SSH.

2. Check if the BBR kernel module is already enabled by running the following command:

   sysctl net.ipv4.tcp_available_congestion_control
   

   If BBR is already listed as one of the available congestion control algorithms, you can proceed to Step 4. Otherwise, continue to Step 3.

3. Edit the sysctl configuration file using a text editor such as nano or vi:

   sudo nano /etc/sysctl.conf
   

4. Add the following lines at the end of the file:

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

5. Save the file and exit the text editor.

6. Apply the changes by running the following command:

   sudo sysctl -p
   

7. Verify that BBR is enabled by running the following command:

   sysctl net.ipv4.tcp_congestion_control
   

   The output should show "bbr" as the value for the "net.ipv4.tcp_congestion_control" parameter.

BBR should now be enabled on your Rocky Linux 9 system