This article explains how to remove a VLAN from a FortiLink on a FortiSwitch managed by a FortiGate with console commands.
Scope
FortiSwitch, FortiGate, FortiLink
Solution
By default, the FortiGate will sync and put VLANs back on the FortiLink after they're removed. Use the following commands on the FortiSwitch (not the FortiGate) to permanently remove VLANs:
# config switch trunk
edit "_FlInKxxxx"
set static-isl enable
set static-isl-auto-vlan disable
end
Reboot the FortiSwitch after the above command, then run the following:
# config switch interface
edit "xxxxxxx" (the ID of the FortiLink interface)
set allowed-vlans 1,xx,xx,4088-4094
end
It will still be possible to use the VLAN on the FortiSwitch, but it will be pruned off the FortiLink (trunk).
