Upgrading a Cluster

To upgrade a CC-SG cluster, follow this recommended upgrade procedure. Only physical CC-SG units can be in a cluster.

A CC-SG cluster license is a special kind of license file that the 2 CC-SG units in the cluster share. See Cluster Licenses for details.

If the upgrade of your primary node fails while following this procedure, see Primary Node Upgrade Failure.

• To upgrade a cluster:

1. Force a failover from your primary node to the backup node by choosing Administration > Cluster Configuration. In the Configuration tab, click Switch Primary and Backup. See Switch the Primary and Secondary Node Status for details.
   • Your backup node becomes Primary. Your former primary node goes into Waiting status.
2. In your new primary node, shutdown the CC-SG application by choosing System Maintenance > Shutdown.
   • When you shutdown the CC-SG application, the unit is still powered on, and accessible through the Diagnostic Console. See CC-SG Shutdown for details.
3. Restart the former primary node, that has been in Waiting status. See Restart CC-SG with Diagnostic Console for details on restarting.
   • The restarted CC-SG unit goes into Primary status again. The backup node that you shutdown is recognized as Failed status.
4. Delete the cluster by choosing Administration > Cluster Configuration. Click Delete Cluster.
5. Enter Maintenance Mode, and then upgrade the primary node. See Entering Maintenance Mode and Upgrading CC-SG.
6. If the primary node upgrade succeeds, perform a factory reset of the backup node by accessing the Diagnostic Console and choosing Operation > Admin > Factory Reset > Full CC-SG Database Reset option. See Reset CC-SG Factory Configuration.
   • If the primary node upgrade fails, see Primary Node Upgrade Failure.
7. Upgrade the backup node that you reset. See Upgrading CC-SG.
8. Recreate the cluster. See Create a Cluster. The data from the primary node synchronizes with the backup node.