VLANs

In the FortiGate UI, navigate to WiFi & Switch Controller > FortiSwitch VLANs.
Ensure VLANs are configured and working on the FortiSwitch for all FortiNAC states desired to be enforced (Registration, Remediation, etc).
Enable Device Detection for each applicable VLAN interface on the FortiGate. This enables FortiGate to see connected devices on the FortiSwitch for that VLAN.
1. Select the VLAN interface, right-click and select Edit.
2. Enable Device Detection and click OK.

In the FortiGate UI, navigate to WiFi & Switch Controller > FortiSwitch VLANs.
Ensure VLANs are configured and working on the FortiSwitch for all FortiNAC states desired to be enforced (Registration, Remediation, etc).
Enable Device Detection for each applicable VLAN interface on the FortiGate. This enables FortiGate to see connected devices on the FortiSwitch for that VLAN.
1. Select the VLAN interface, right-click and select Edit.
2. Enable Device Detection and click OK.