Using FortiAnalyzer units running older versions
When using FortiOS 6.0.18 with FortiAnalyzer units running 5.6.5 or lower, or 6.0.0-6.0.2, FortiAnalyzer might report increased bandwidth and session counts if there are sessions that last longer than two minutes.
For accurate bandwidth and session counts, upgrade the FortiAnalyzer unit to the latest version.