Operation Manual

Idle Check Interval: The amount of time between each check. (Default: 30 seconds. Range: 10-3600 seconds.)
Monitor while connected: (Default: Off) Select from the following dropdown options:
Passive DNS (modem only): The router will take no action until data is detected that is destined for the WAN. When
this data is detected, the data will be sent and the router will check for received data for two seconds. If no data is
received the router behaves as described below under Active DNS.
Active DNS (modem only): A DNS request will be sent to the DNS servers. If no data is received, the DNS request
will be retried four times at five-second intervals. (The first two requests will be directed at the Primary DNS server
and the second two requests will be directed at the Secondary DNS server.) If still no data is received, the device
will be disconnected and failover will occur.
Active Ping: A ping request will be sent to the Ping Target. If no data is received, the ping request will be retried
four times at five-second intervals. If still no data is received, the device will be disconnected and failover will occur.
When “Active Ping” is selected, the next line gives an estimate of data usage in this form: “Active Ping could use as
much as 9.3 MB of data per month.” This amount depends on the Idle Check Interval.
Off: Once the link is established the router takes no action to verify that it is still up.
Ping IP Address: If you selected “Active Ping”, you will need to input an IP address. This must be an address that can
be reached through your WAN connection (modem/Ethernet). Some ISPs/Carriers block certain addresses, so choose
an address that all of your WAN connections can use. For best results, select an established public IP address. For
example, you might ping Google Public DNS at 8.8.8.8 or Level 3 Communications at 4.2.2.2.
IPv6 Failure Check (Advanced)
The settings for IPv6 Failure Check match those for IPv4 Failure Check except that the IP address for Active Ping is an
IPv6 address.
Failback Configuration (Advanced)
This is used to configure failback, which is the ability to go back to a higher priority WAN interface if it regains connection
to its network.
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