Dual modems mean that a FortiExtender unit comes with two LTE interfaces for internet connectivity. These two LTE interfaces can be used for link load balancing. FortiExtender works in local IP pass-through mode, as an extended modem of any router. In this mode, FortiExtender must be connected directly to the WAN port of the router and the router WAN port must be in DHCP mode.
To enable local IP pass-through mode:
FX212E5919000009 # config system management local
FX212E5919000009 (local) # set mode ip-passthrough
FX212E5919000009 (local) # end
FX212E5919000009 # config system management
FX212E5919000009 # set discovery-type local
FX212E5919000009 # end
A virtual wire pair configuration is necessary to enable the IP Pass-through forwarding between two ports.
FX212E5919000009 # config system virtual-wire-pair
FX212E5919000009 (virtual-wire-pair) # set lte1-mapping lan
FX212E5919000009 (virtual-wire-pair)# end