What is the first step to manually configure a device as an HA cluster?

To manually configure a device as a High Availability (HA) cluster, the first step involves enabling the HA cluster in the device manager settings. This is essential because enabling HA initiates the process of setting up the devices to work together in a cluster for redundancy and load balancing.

Once HA is enabled, the devices can start sharing critical configuration parameters and synchronizing state information, which are vital for the cluster to function properly. This step establishes the framework necessary to later introduce additional configurations, such as defining roles, setting up the HA mode, and configuring network interfaces.

While entering a device serial number, performing a factory reset, and configuring network interfaces are important tasks in different contexts, they do not address the fundamental requirement of activating HA on the device. Each of these steps can follow after enabling HA in the device manager settings to ensure that the devices are correctly set up to work as a cluster.