So as you may have noticed, your logs can often be filled with local broadcasts and traffic of that sort. You can remove these from your logging to help clean things up. This never crossed my mind until I was reading some other blogs that belong to Fortinet TAM’s, consultants etc. This little tid bit is thanks to FireWall GURU. Below you will see commands on how to do this for specific devices:

FortiAnalyzer:
config log fortianalyzer filter
set local-traffic disable
end

Log Disk
config log disk filter filter
set local-traffic disable
end

Memory:
config log memory filter
set local-traffic disable
end

Syslog
config log syslogd filter
set local-traffic disable
end