Verifying negotiated switchover

You can test the negotiated (planned) switchover operation to confirm uninterrupted data availability.

About this task

This test validates that data availability is not affected (except for Microsoft Server Message Block (SMB) and Solaris Fibre Channel protocols) by switching the cluster over to the second data center.

This test should take about 30 minutes.

This procedure has the following expected results:

The metrocluster switchover command will present a warning prompt.
If you respond yes to the prompt, the site the command is issued from will switch over the partner site.

For MetroCluster IP configurations:

For ONTAP 9.4 and earlier:
- Mirrored aggregates will become degraded after the negotiated switchover.
For ONTAP 9.5 and later:
- Mirrored aggregates will remain in normal state if the remote storage is accessible.
- Mirrored aggregates will become degraded after the negotiated switchover if access to the remote storage is lost.
For ONTAP 9.8 and later:
- Unmirrored aggregates that are located at the disaster site will become unavailable if access to the remote storage is lost. This might lead to a controller outage.

Procedure

Confirm that all nodes are in the configured state and normal mode: metrocluster node show

cluster_A::>  metrocluster node show

Cluster                        Configuration State    Mode
------------------------------ ---------------------- ------------------------
 Local: cluster_A               configured             normal
Remote: cluster_B               configured             normal

Begin the switchover operation: metrocluster switchover

cluster_A::> metrocluster switchover
Warning: negotiated switchover is about to start. It will stop all the data Vservers on cluster "cluster_B" and 
automatically re-start them on cluster "cluster_A". It will finally gracefully shutdown cluster "cluster_B".

Confirm that the local cluster is in the configured state and switchover mode: metrocluster node show

cluster_A::>  metrocluster node show

Cluster                        Configuration State    Mode
------------------------------ ---------------------- ------------------------
Local: cluster_A                configured             switchover
Remote: cluster_B               not-reachable          -
              configured             normal

Confirm that the switchover operation was successful: metrocluster operation show

cluster_A::>  metrocluster operation show

cluster_A::> metrocluster operation show
  Operation: switchover
      State: successful
 Start Time: 2/6/2016 13:28:50
   End Time: 2/6/2016 13:29:41
     Errors: -

Use the vserver show and network interface show commands to verify that DR SVMs and LIFs have come online.