Cradlepoint CBA750B Product Manual page 26

CBA750B| USER MANUAL Firmware version 4.2
CRADLEPOINT
7) Configuring Failure Check:
It is possible for a WAN interface to go down without the
router recognizing the failure. (For example: the carrier
for a cellular modem goes dormant.) Enable Failure
Check to ensure that you can get out to the Internet via
your primary WAN connection. This option is disabled
by default because it may use data unnecessarily. Use
this in combination with failover or Aggressive Reset
(Internet ! Connection Manager under Modem
Settings in the interface/rule editor).
Idle Check Interval: Set the number of seconds the router will wait between checks to see if the WAN is still available.
(Default: 30 seconds. Range: 10-3600 seconds.)
Monitor while connected: Select from the dropdown menu. (Default: Off)
• Active Ping: A ping request will be sent to the Ping Target. If no data is received, the ping request will be
retried 4 times at 5-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 that will respond to a ping request.
This IP address must be an address that can be reached through your WAN connection. 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.
Click NEXT.
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For example, you might ping Google Public DNS at 8.8.8.8 or Level 3 Communications at 4.2.2.2.
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