MetroCluster IP controller upgrade workflow using system controller replace
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Beginning with ONTAP 9.13.1, you can use this guided automated MetroCluster switchover procedure to perform a non-disruptive controller upgrade on a four-node MetroCluster IP configuration using system controller replace commands. Other components (such as storage shelves or switches) cannot be upgraded as part of this procedure.
You can use this workflow to upgrade MetroCluster IP controllers running ONTAP 9.13.1 or later using switchover and switchback with system controller replace commands.
Review the supported upgrade combinations and requirements, and complete the required tasks to prepare your system for the controller upgrade. The automated controller upgrade process begins with a series of prechecks before you collect the configuration information and remove any existing monitoring software.
The automation operation initiates the switchover operations. After these operations complete, the operation pauses so you can prepare the network configuration of the old controllers, rack and install the new controllers, reassign the root aggregate disks, and boot the new controllers.
Complete the automated controller upgrade by verifying the network reachability, repeating the upgrade tasks on the second site, and restoring monitoring configuration.