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Step 1: Unpair the Machines
On the HA Master Node, delete the Peer node [HA Slave Node] that failed to upgrade.
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Step 2: Reinstall (fresh install) the failed machine
Before doing a fresh install on the failed Peer Node [HA Slave Node] machine, download the latest configuration backup.
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Install on the failed Peer Node [HA Slave Node] machine a fresh NSC version that was previously used.
Step 3: Restore from the configuration backup
Upload the backup to the Peer Node [HA Slave Node] machine
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Restore from the backup
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Restart the system
Step 4: Perform an update to the new release
On the Peer Node [HA Slave Node], upgrade NSC version that matches the version on the HA Master Node.
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Install the the update.
Step 5: Reattach to the peer node
On the Peer Node [HA Slave Node], generate an access key done on the HA settings page.
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On the HA Master Node, before committing to the HA copying configuration to Peer action make sure the all the other HA configurations are setup properly including HA configuration settings, Floating IP, and SIP profile that is used for HA. Refer to the High Availablity Failover to verify. Proceed to copy configuration to Peer, once HA Master Node is setup for HA.
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