What is the purpose of the 'Diagnose ha restart-int-sync' command?

The command 'Diagnose ha restart-int-sync' is specifically utilized in the context of High Availability (HA) configurations within Fortinet devices. Its primary function is to start or restart the HA synchronization process. This process is vital for ensuring that configuration changes and state information are consistently synchronized across all devices in the HA cluster.

When this command is executed, it effectively prompts the device to refresh and synchronize all its configuration settings with the peer unit in the HA setup. This is crucial for maintaining redundancy and high availability as it helps to ensure that both devices have the exact same configuration and status, reducing the risk of inconsistencies that could lead to network outages or failures.

The other options do not pertain to this command's specific functionality. For instance, initiating a complete system reset would involve different commands entirely, as would reloading device firmware. Restarting the cluster configuration is a broader action than what is intended with this command, which is solely focused on synchronization. Thus, the command serves a targeted purpose in managing HA configurations effectively.