Accelerated 6310-DX, User Manual, Page: 29 / 235

Dual-WAN Configurations Dual-WAN Configurations
The DX-series cellular extender is a dual-WAN device, meaning it has two interfaces capable of
providing Internet access by default -- its WAN Ethernet port and the plug-in cellular modem --
though additional LAN ports may even be reconfigured for supplemental Internet access. Active
WAN connections can provide both failover and load balancing per user-defined parameters
Failover Failover
By default, this allows the plug-in modem to serve as a secondary (backup) WAN that becomes
the active connection once the Ethernet WAN port is detected as offline. The device then
monitors the offline connection to see when it comes back online, which prompts the backup
interface to once again become inactive.
Each interface has a Metric Metric value associated with its IPv4 configuration. The example on this
page is associated with the WAN interface, which will take priority over all other interfaces by
default (as seen by its Metric value of "1").
Connectivity Monitoring Connectivity 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 monitor
the primary connection. Both a Ping and HTTP test come built into the DX's WAN port
configuration by default. After 4 failed attempts, the secondary connection will take over
Internet access for the device. Similarly, the monitoring tests trigger the restoration of the
primary WAN connection when they detect that the interface with a higher metric has come
back up. Note: Note: 2 different tests are recommended to prevent false positives

NOTE: NOTE: Best practices dictate that redundant tests (with divergent failure conditions) will be the best way
to ensure proper connectivity monitoring/active recovery. With only a single test type, false positives
could be reported.
User Manual
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