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Page 228 SonicWALL Internet Security Appliance Administrator’s Guide
Alert It is important during initial configuration that the backup SonicWALL has not been previously
configured for use. If the backup SonicWALL has previous network settings, it is recommended to
reset the SonicWALL to the factory default settings using Restore Factory Default Settings located
in the Tools section. Additionally, the password must be changed back to the default password of
“password” using the Password tab in the General section.
10. Power on the backup SonicWALL used for High Availability. After completing the diagnostic
cycle, the primary SonicWALL auto-detects the presence of the backup SonicWALL and
synchronizes the settings.
11. To confirm that the synchronization is successful, check the primary SonicWALL log for a High
Availability confirmation message. Alternatively, you can log into the backup SonicWALL using
its unique LAN IP address and confirm that it is the backup SonicWALL.
If the primary SonicWALL fails to synchronize with the backup, an error message is displayed at the
bottom of the screen. An error message also appears on the Status tab. To view the error message
on the Status tab, click General on the left side of the browser and then Status at the top of the
window.
To check the backup SonicWALL firmware version or serial number, log into the backup SonicWALL,
click General on the left side of the browser window and then click Status at the top of the window.
Both the firmware version and the SonicWALL serial number are displayed at the top of the window.
If the backup SonicWALL serial number was incorrectly specified in the primary SonicWALL Web
Management Interface, log into the primary SonicWALL and correct the backup SonicWALL Serial
Number field.
At this point, you have successfully configured your two SonicWALLs as a High Availability pair. In the
event of a failure in the primary unit, the backup unit takes over operation and maintains the
connection between the protected network and the Internet.
Configuration Changes
Configuration changes for the High Availability pair can be made on the primary or the backup
SonicWALL. The primary and backup SonicWALL appliances are accessible from their unique IP
addresses. A label indicates which SonicWALL appliance is accessed.