unttaged port

You have todo nothing, by default the port is not "tagged". Just assign your layer3 address to the port and connect it to a non-TAGGED switch interface

Ken

So, is the port tagged ( trunk  or not? If not just plug your fortigate port to the  switch port that's in vlan2.

i.e ( cisco )

config t

   int gi 0/2

      switch mode access

      switch access vlan 2

      description " MY FGT APPLIANCE PORT XYZ "

   end

 ( ie  fortigate )

config sys int

edit "port2"         set vdom "root"         set type physical         set ip 1.1.1.1/24     next end

Ken