FortiSwitch logging and useful events

Hi All,

I've moved one of our locations over to FortiGate managed FortiSwitches, as part of a 5.6 Security Fabric.  It's actually gone pretty smoothly, though I am doing some direct CLI setting of the FortiSwitches for a few things.

I found I needed to set 

    config switch-controller switch-log

        set severity notification

to get enough useful logs.  These show up as system events on the FortiAnalyzer.  Oddly, a bunch of them show up with level=information.

I added a custom event handler to the FortiAnalyzer so that BPDU Guard shutting down a port will notify me:

    Log Type: Event Log

    Generic Text Filter: msg ~ "BPDU Guard: BPDU detected"

I found this useful since I set BPDU Guard on all edge ports and it catches bad configurations or malicious devices.  It also helped me discover our Sonos system does its own BPDUs - fun, fun.

I'm curious what useful or non-standard FortiSwitch events others might have created custom events for?

Or docs with possible FortiSwitch events, beyond the four types listed in the CLI (event, router, system, user)?