What does 'diagnose ha debug-sync on' do?

The command 'diagnose ha debug-sync on' is utilized within a high-availability (HA) environment in Fortinet devices. When this command is executed, it enables debugging specifically for the synchronization process between HA clusters. This is crucial for troubleshooting purposes, as it provides detailed logs regarding the synchronization of state and data between the primary and secondary units.

By engaging this debug mode, network engineers can closely monitor the synchronization process, identify issues, and analyze any discrepancies that might arise during the HA operation, thereby facilitating effective resolution of potential problems. This insight is especially valuable when diagnosing synchronization failures or delays, ensuring that both units in the HA cluster are aligned and functioning correctly.

In contrast, enabling user authentication, disabling synchronization, or displaying device uptime involves different commands and functionalities that do not pertain to the specific task of troubleshooting synchronization issues. Thus, the correct context and functionality associated with 'diagnose ha debug-sync on' directly aligns with enabling sync data debugging for troubleshooting.