Technical Tip: Fortiextender interface will not show up on FortiGate GUI

[bsai_FTNT]

Description
This article describes the reason why FortiExtender interface will not be visible on FortiGAte GUI for models that do not support VDOMs

Related link: 
FortiExtender release notes and admin guide: https://docs.fortinet.com/product/fortiextender/4.1

Scope
FortiGate-30D, FortiGate-30D-POE, FortiWifi-30D, FortiWifi-30D-POE.

Solution
For a FortiExtender to show up on the FortiGate GUI under Interfaces, the FortiExtender interface has to be mapped to root VDOM of the FortiGate.
For FortiGate which supports VDOM, here is how the config looks:

# config system interface
    edit "extender"
        set vdom "root" ==> this is missing.
        set mode dhcp
        set type fext-wan
   next  

For FortiGate which does not support VDOM “set vdom root” will be missing, hence FortiExtender interface will not be visible under FortiGate GUI -> Interfaces.

    edit "extender"
        set mode dhcp
        set allowaccess ping https
        set type fext-wan
    next

Notes.
Although FortiExtender interface will not show up on GUI, the FortiExtender will be up and operational on the FortiGate.