Manually Initiating a Switchover

To manually initiate a switchover from an active supervisor module to a standby supervisor module, use the active supervisor module using Device Manager. After you enter this command, another switchover process cannot be started on the same switch until a stable standby supervisor module is available.

To perform a switchover using Device Manager, follow these steps:

Ensure that an HA switchover is possible by selecting Physical > Modules to verify the presence of multiple modules.

In the main Device Manager screen, select Admin > Reset Switch.

Click Switch to Standby.

The following conditions identify when automatic synchronization is possible:

If the internal state of one supervisor module is Active with HA standby and the other supervisor module is HA standby, the switch is operationally HA and can do automatic synchronization.

If the internal state of one of the supervisor modules is none, the switch cannot do automatic synchronization.

Table 8-1 lists the possible values for the redundancy states.

Table 8-1 Redundancy States
State	Description
Not present	The supervisor module is not present or is not plugged into the chassis.
Initializing	The diagnostics have passed and the configuration is being downloaded.
Active	The active supervisor module and the switch is ready to be configured.
Standby	A switchover is possible.
Failed	The switch detects a supervisor module failure on initialization and automatically attempts to power-cycle the module three (3) times. After the third attempt it continues to display a failed state. Note You should try to initialize the supervisor module until it comes up as HA-standby. This state is a temporary state.
Offline	The supervisor module is intentionally shut down for debugging purposes.
At BIOS	The switch has established connection with the supervisor and the supervisor module is performing diagnostics.
Unknown	The switch is in an invalid state. If it persists, call TAC.

Table 8-2 lists the possible values for the supervisor module states.

Table 8-2 Supervisor States
State	Description
Active	The active supervisor module in the switch is ready to be configured.
HA standby	A switchover is possible.
Offline	The switch is intentionally shut down for debugging purposes.
Unknown	The switch is in an invalid state and requires a support call to TAC.

Table 8-3 lists the possible values for the internal redundancy states.

Table 8-3 Internal States
State	Description
HA standby	The HA switchover mechanism in the standby supervisor module is enabled (see the "Synchronizing Supervisor Modules" topic).
Active with no standby	A switchover is not possible.
Active with HA standby	The active supervisor module in the switch is ready to be configured. The standby module is in the HA-standby state.
Shutting down	The switch is being shut down.
HA switchover in progress	The switch is in the process of changing over to the HA switchover mechanism.
Offline	The switch is intentionally shut down for debugging purposes.
HA synchronization in progress	The standby supervisor module is in the process of synchronizing its state with the active supervisor modules.
Standby (failed)	The standby supervisor module is not functioning.
Active with failed standby	The active supervisor module and the second supervisor module is present but is not functioning.
Other	The switch is in a transient state. If it persists, call TAC.