This section uses the veLinux2.0 version system as an example. The procedure might vary slightly for other versions. Refer to your actual environment for details.

Procedure

Run the following command to access the /etc/sysctl.conf file.

vim /etc/sysctl.conf

Enable TCP SACK.

Does net.ipv4.tcp_sack-related configuration exist?

Procedure

Does net.ipv4.tcp_sack-related configuration exist?	Procedure
The configuration related to net.ipv4.tcp_sack exists.	Press "i" to enter edit mode. Modify net.ipv4.tcp_sack = X to net.ipv4.tcp_sack = 1. Press Esc to exit the editing mode. Type :wq, and press Enter to save and exit.
The configuration related to net.ipv4.tcp_sack does not exist.	Press the "i" key to enter the editing mode. Add the following configuration at the bottom of the file. net.ipv4.tcp_sack = 1 The system displays information similar to the following. Press Esc to exit the editing mode. Type :wq, and press Enter to save and exit.

Execute the following command to make the configuration take effect.

sysctl -p

Last updated: 2026.06.18 17:49:52

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