How does FortiGate handle logging during a firmware upgrade?

During a firmware upgrade, FortiGate devices manage logging by ensuring that the log transmission continues seamlessly if the connection to FortiAnalyzer (FAZ) is still active. If this connection is lost, however, the device will stop logging to prevent data loss and ensure the integrity of the logs being sent. This behavior helps maintain accurate records and avoids complications that may arise from incomplete log transmissions during the upgrade process.

The ability to halt logging if the connection to FAZ is interrupted underscores the importance of maintaining a reliable connection during firmware updates, allowing the device to focus on stability and performance. This approach prioritizes the integrity of logging data over the potential for generating logs that might not be properly stored or categorized if the connection is unstable.