I can't easily find this part of FGT-Managed FSW operation in the guid books or somewhere else. So I decided to post this.
I was trying to figure out how to duplicate Cisco CBS switch's default QoS behaviors with FSWs and looked like I messed up config probably because I was touching both FGT and FSW config via console. So I decided to start over from scratch. Then encountered some difficulty because a simple Factory reset of those managed switches via GUI doesn't erase whatever configured under "config switch-controller". Especially under "config switch-controller managed-switch".
Even when I "Delete" each FSW at WiFi&Switch Controller->Managed FortiSwitches in GUI, the config under "config switch-controller managed-switch" stays there. And maybe because of that, I don't seem to be able to re-register/re-authorize the FSWs. In this situation, do I have to go in CLI and delete all of them one by one (or just "purge")?
Or, is there a simple button to erase all FSW related config without factory-resetting the entire FGT config?