I have active SIM cards in all my MX67C appliances, to act as internet backup if my wired WAN internet service goes down.  My assumption is that if the wired WAN goes down, the device should automatically failover to the cellular internet service.  The only way I've been able to get the failover to work is to physically unplug the wired WAN ethernet cable, or disable the port.  It seems the 'trigger' for the cellular backup to kick-in is a loss of layer 1 on the wired WAN port.  In most cases, when the wired internet service goes down, the layer 1 connection is still intact between the MX67C and the ISP router, so the MX 'thinks' the connection is still active and does not fail over to the cellular service.  Is anyone aware of a way to setup a heartbeat ping to something on the internet or another 'logical' way for the MX to verify wired WAN internet service?  I need the failover to be triggered by something at the layer 2 or 3 level.  Having to have someone physically unplug the cable is a nuisance, and administratively disabling the WAN port is dangerous, as I would have no way to get back into the appliance if the cellular backup did not come online.  Also - I do NOT want to run the two WAN connections in an active/active or load balancing config, as I pay by the GB when the cellular connection is active.  I only want the cellular service to come on if the primary wired WAN connection fails.   ... View more