Creating the second vNIC

In the FortiGate instance, click Attached VNICs > Create VNIC.
Create the vNIC by specifying the name, VNC, and internal subnet created earlier. Ensure Skip Source/Destination Check is selected.. Enter an IP address and click Create VNIC.

You now have the second network interface attached to the FortiGate.

In the FortiGate instance, click Attached VNICs > Create VNIC.
Create the vNIC by specifying the name, VNC, and internal subnet created earlier. Ensure Skip Source/Destination Check is selected.. Enter an IP address and click Create VNIC.

You now have the second network interface attached to the FortiGate.