Primary Interface; Failover Settings - SonicWALL TELE3 SP Installation Manual

Primary Interface

The SonicWALL TELE3 SP automatically detects if a WAN Ethernet connection exists when the
SonicWALL is powered on. Because it can automatically detect the Ethernet connection, the
Primary Interface is Ethernet.

Failover Settings

You can enable WAN failover for the SonicWALL by configuring settings in this section. Select
Enable WAN Failover to use this feature on the SonicWALL. Use the following instructions to
configure the Failover Settings:
1. Select Enable WAN Failover.
2. Enter the IP address for the probe target in the Probe Target (IP Address) field. The
Probe IP address is a static IP address on the WAN. If this field is left blank, or 0.0.0.0 is
entered as the address, the Probe Target is the WAN Gateway IP address.
Note: The probe is a ping sent to the IP address and is used, along with the response, as a
method of determining Internet connectivity.
3. In the Probe Interval (seconds) field, enter the amount of time between probes to the
Probe Target. Five (5) seconds is the default value. To deactivate the Probe Detection
feature, enter zero (0) as the value. In this case, the WAN Failover only occurs when loss
of the physical WAN Ethernet connection occurs on the TELE3 SP.
4. Enter a value for the number of successful probes required to reactivate the primary
connection in the Successful Probes to Reactivate Primary field. The default value is
five (5). By requiring a number of successful probes before the SonicWALL returns to its
primary connection, you can prevent the SonicWALL from returning to the primary
connection before the primary connection becomes stable.
5. Enter the number of missed probes required for the WAN failover to occur in the Failover
Trigger Level (missed probes) field.
6. Enable Preempt Mode if you want the primary WAN Ethernet interface to take over from
the secondary modem WAN interface when it becomes available after a failure. If you do
not enable Preempt Mode, the secondary WAN modem interface remains active as the
WAN interface until you click Disconnect.
7. Click Update for the settings to take effect on the SonicWALL.
Page 44 SonicWALL TELE3 SP Installation Guide