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I want to use VLAN with Fortigate 40C.

With the Fortigate 40C under the upper router (Cisco 841M),
When setting a VLAN on the router side, the trunk cannot be received by Fortigate 40C.

What I tried

I made the following settings in the Fortigate CLI, but it did not work.

config system interface
edit vlan100_int1
   set type vlan
   set vlanid 100
   set interface internal1
edit vlan100_wan1
   set type vlan
   set vlanid 100
   set interface wan1
edit vlan101_int1
   set type vlan
   set vlanid 101
   set interface internal1
edit vlan101_wan1
   set type vlan
   set vlanid 101
   set interface wan1
end
Supplemental information (FW/tool ​​version, etc.)

FW:v5.2.11,build754(GA)

  • Answer # 1

    I imagine the following configuration, is it correct?

    Router ⇔ Forti40c ⇔ L2 switch

    Connection port with router: wan1
    Connection port with L2 switch: internal1

    Router ⇔ Forti40c: Tagged VLAN 100, 101
    Forti40c ⇔ L2 switch: Tagged VLAN 100, 101

    In the above configuration, the access port VLAN 100 or 101 is set in the L2 switch, the terminal is connected to the access port VLAN, and the IP address of the router is pinged.

    In this configuration, the most suspicious thing is that I have not created a FW policy between Forti40c wan1 and internal1.
    It depends on memory, but it seems that all packets were dropped by default...