Vlan and Trunk

[Itaid]

Best Way to configure Fortinet 60f as per given topology. In this topology every Lan5 -Lan 7 is connected to L2 manageable switches. All client devices are connected through these L2 switches.  What will be the best possible configuration?

[ebilcari]

This will depend, are these Fortiswitches, do you need to span same VLANs through all the switches, is there any throughput requirement for horizontal traffic?

[Itaid]

No these are not Fortiswitches, they may be any other switches from different vendors such as cisco, ruijie etc. I need all VLANs through all switches and no throughput requirement.

[ebilcari]

The easiest way could be creating a hardware switch with these 4 interfaces and create VLANs on top of it, like this:

[Itaid]

you are using software switch in above diagram. Is hardware switch and software switch same?

[ebilcari]

Currently I have access to a FGT VM that doesn't support a HW SW :)

From the configuration perspective is the same, but there are differences and using a hardware switch is recommended in FGT models that support it. In the section of the guide here there is a table that list the differences.

[Itaid]

There is no option of hardware switch in some models. I'm not sure if it is available in 60F or not!

[ebilcari]

Based on the Hardware Acceleration guide and its architecture, this model should support hardware switch.

[Toshi_Esumi]

By the way, the 60F doesn't have LAN6-8. It has 1-5 LAN port, a/b fortilink ports, and DMZ port. So you have to utilize a/b and DMZ as LAN6-8 if LAN1-5 are pre-occupied.
All of them are under the same switching fabric so you can bind them into a hardware-switch(or VLAN switch by default) once you removed a and b from fortilink.
https://docs.fortinet.com/document/fortigate/7.6.1/hardware-acceleration/758378/fortigate-60f-and-61...

Toshi