The S9500 series supports redundant backup. Once the active SRPU is faulty, the services will immediately switch over to the standby one, ensuring service continuity. The active and standby SRPUs must run the same software version. You can use the slave switchover command to conduct manual switchover.
<H3C>slave switchover
Caution!!! Confirm switch slave to master[Y/N]?y
Before the manual switchover, the standby board must have backed up the active board information, i.e., it is in the real-time backup state. If the backup process is going on, the system will prompt switchover failure. In that case, you can use the display switchover state command to view the status of the standby board:
<H3C>display switchover state
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