Failover - D-Link DWR-921 User Manual

Section 4 - Configuration
The DWR-921's WAN failover feature allows the router to switch to a 3G/4G connection as a backup if the WAN connection is down or unavailable.
Failover type: Select Failover to enable the failover function.
Remote Host for
This option should be set to an external IP address that can be
Keep Alive:
used to ensure that the 3G/4G LTE connection will be kept from
going offline due to inactivity. An example would be Google's
public DNS servers (8.8.8.8 or 8.8.4.4) or your Internet service
provider's DNS servers.
Primary WAN:
This will automatically be set to the currently configured Internet
connection type.
Secondary WAN: This can be set by clicking on Add, the available options will be
shown in the drop down box that appears.
Click Apply to save your settings, or Refresh to revert to your
previous settings.
D-Link DWR-921 User Manual

Failover

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