How to determine the MAC address of a CSS composed of S series modular switches

The MAC address of the master switch is used as the system MAC address of the CSS when the CSS is set up.
If you restart the CSS or remove and reinstall another MPU, the system MAC address may change, resulting in service interruptions. To prevent this problem, run the set css system-mac chassis chassis-id command to set the system MAC address to the MAC address of a member switch, ensuring consistency of the system MAC address.

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