Page 228 SonicWALL Internet Security Appliance Administrator’s Guide
Alert It is important during initial configu ration that the backup So nicWALL has not been pre viously
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 i n the General section.
10. Power on the backup SonicWALL used for High Avail ability. After completing the diagnostic
cycle, the primary SonicWALL auto-detects the presence of the backup SonicWALL and
synchronizes the settings.
11. To confirm tha t t h e syn chronization is successful, chec k 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 t he 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 chec k the back up SonicW ALL firmw are versio n or seria l number, log into t he backup SonicWAL L,
click General on the left side of the browser window and then click Statu s at the top of the window.
Both the firmware version an d the Son ic WA LL ser ial number ar e disp l ayed a t th e top of the wi nd ow.
If the backup S onicWA LL se rial nu mber w as inc orrect ly spec ified in the primar y Soni cWALL Web
Management Interface, log into the primary SonicWALL and correct the backup SonicWALL Serial
Number field.
At this point, y ou have successfull y 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 fo r 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 lab e l indicates which SonicWALL appliance is accessed.