The MTU value takes effect after the restart

We modified the MTU value to take effect permanently. However, after the system restarts, the MTU value is still the same as before. How can THE MTU be modified correctly and take effect permanently? thank you

In the /etc/network/interfaces directory, add MTU 9000


For dynamic IP case, the MTU is from dhcp.

You may need to configure /etc/dhcp/dhclient.conf.

thanks,I configured a static IP address

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