Same VLAN's on multiple switches

[Forti-Mon]

We have 2 fortiswitches for wireless AP's

1 switch is installed

When i come to installing the second switch, I just want the same VLAN's available for the WIFI.

Is this achievable?

Do I just create the same VLANs? 

I have a feeling it will tell me they are already in use. 
I read about Subnet overlap....is this something I need to enable?

Thanks

[ebilcari]

Spanning same VLAN IDs over different switches is a normal/most common configuration. How are the switch connected to each other, is there a FGT that manages them?

[Forti-Mon]

Yes the Fortigate is the Manager of the switches

Do I need to connect the switches to each other as well as to the Fortigate?

Thanks

[ebilcari · Accepted solution]

The topology will depend on the network requirements. You can find a list of suggested topologies in the guide. In this simple scenario, I think you can choose one of these options:

• Single FortiGate unit managing multiple FortiSwitch units (using a hardware or software switch interface)
• Single FortiGate unit managing a stack of several FortiSwitch units

[Forti-Mon]

Excellent, thank you