CRADLEPOINT
CBA750B | USER MANUAL Firmware version 5.0
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PAGE 27
8)
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.
For example, you might ping Google Public DNS at 8.8.8.8 or Level 3 Communications at 4.2.2.2.
Click
NEXT
.
Summary of Contents for CBA750B
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