configure FortiSwitch124 poe with FortiGate40c

[daj]

Hello,

  I have fortgate40C unit with fortios 5.3.15 running . Now i have a fortiswitch 124POE which needs to  be connected with this fortigate40c . In my fortigate I am not able to see fortiswitch controller. 

How can i configure fortiswitch and fortigate, so that i can access fortiswitch too from the same lan. 

[M_M_SW]

upgrade FortiOS to 6.0.9 or 6.2.3

[MikePruett]

Not going to lie, I would highly suggest getting rid of the 40C. It's incredibly old.