Dual-WAN ConfigurationsDual-WAN ConfigurationsThe MX-series router is a dual-WAN device, meaning it has two interfaces capable of providingInternet access by default -- its WAN Ethernet port and the plug-in cellular modem -- thoughadditional LAN ports may even be reconfigured for supplemental Internet access. Active WANconnections can provide both failover and load balancing per user-defined parametersFailoverFailoverBy default, this allows the plug-in modem to serve as a secondary (backup) WAN that becomesthe active connection once the Ethernet WAN port is detected as offline. The router thenmonitors the offline connection to see when it comes back online, which prompts the backupinterface to once again become inactive.Each interface has a MetricMetric value associated with its IPv4 configuration. The example on thispage is associated with the WAN interface, which will take priority over all other interfaces bydefault (as seen by its Metric value of "1").Connectivity MonitoringConnectivity Monitoring Both tests are set via the default group config in Accelerated View -- it is not built into the firmware.Devices that have not synced with AView will not have these tests enabled by default.To properly trigger a failover (or failback) scenario, test parameters must be defined to monitorthe primary connection. Both a Ping and HTTP test come built into the MX's WAN portconfiguration by default. After 4 failed attempts, the secondary connection will take overInternet access for the router. Similarly, the monitoring tests trigger the restoration of theprimary WAN connection when they detect that the interface with a higher metric has comeback up.Accelerated NoticesPage 31Page 316330-MX / 6335-MX