If a new standby CSM is inserted into the system, it synchronizes with the active CSM upon a successful boot process.
If the standby CSM is rebooted, it synchronizes with the active CSM upon a successful boot process.
When configuration or state changes occur, an incremental synchronization is conducted from the active CSM to the standby CSM.
If the synchronization fails, the standby CSM does not reboot automatically. The show redundancy synchronization command displays synchronization output information.
If the active and standby CSMs are not synchronized for some reason, users can manually synchronize the standby CSM by rebooting the standby by issuing the admin reboot standby command.