> # Switchover Processes

> Switchovers occur by one of the following two processes:

> - The active supervisor module fails and the standby supervisor module automatically takes over.
> - You manually initiate a switchover from an active supervisor module to a standby supervisor module.

> Once a switchover process has started another switchover process cannot be started on the same switch until a stable standby supervisor module is available.

> Caution | If the standby supervisor module is not in a stable state (ha-standby), a switchover is not performed.

> This section includes the following topics:

> - Synchronizing Supervisor Modules
> - Manual Switchover Guidelines
> - Manually Initiating a Switchover

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