Troubleshooting Tip: Unable to assign a native VLAN if the VLAN is on a different VDOM

In the following example, on the managed FortiSwitch config, when attempting to assign VLAN 128 as a native VLAN, it does not appear in the GUI for selection.

VLAN 128 is in a different VDOM, so it does not appear in the GUI for native VLAN selection. VLANs that belong to different VDOMs are not displayed in the GUI for this purpose. To configure VLAN 128 as a native VLAN, it must be done via the CLI, as this cannot be performed through the GUI; this is by design.

FortiGate-60F-Master # config switch-controller managed-switch
FortiGate-60F-Master (managed-switch) # edit S108FPTVXXXXXXX

FortiGate-60F-Master (S108FPTVXXXXXXX) # config ports

FortiGate-60F-Master (ports) # edit port5

FortiGate-60F-Master (port5) # set vlan vlan128

FortiGate-60F-Master (port5) # end

After making changes from the CLI, the configuration was applied.