What I am thinking to create three three V-lans on L2 switch like :-
Now one of the interface 4, want to use as a Trunk port which will be connect with directly FW. Now is it possible that all Vlan data go through the trunk port to FW to Internet. If it is then please show me a one example with configuration, if possible. Thanks.
If you see my previous post I have mentioned about Subinterfaces, which are created on a physical interface e0.
Alnd you are connecting only 1 cable from the switch to the FW (int 4 in your case) to the FW (int e0), for the three vlans.