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SONICWALL SONICOS ENHANCED 2.5 ADMINISTRATOR’S GUIDE
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Hardware Failover > Settings
Sychronizing Firmware
Checking the Sychronize Firmware Upload and Reboot checkbox allows the Primary And Backup
SonicWALL security appliances in Hardware Failover mode to have firmware uploaded on both
devices at once, in staggered sequence to ensure security is always maintained. During the firmware
upload and reboot, you are notified via a message dialog box that the firmware is loaded on the
Backup SonicWALL security appliance, and then the Primary SonicWALL security appliance. You
initiate this process by clicking on the Synchronize Firmware button.
Monitoring Links
On the Hardware Failover>Monitoring page, you can specify IP addresses that the SonicWALL
security appliance performs an ICMP ping on to determine link viability.
When using logical monitors, the SonicWALL will ping the defined ‘Probe IP Address’ target from the
Primary as well as the Backup SonicWALL. If both can successfully ping the target, no failover
occurs. If both cannot successfully ping the target, no failover occurs, as the SonicWALLs will assume
that the problem is with the target, and not the SonicWALLs. But, if one SonicWALL can ping the
target but the other SonicWALL cannot, it will failover to the SonicWALL that can ping the target.
Hardware Failover Status
If failure of the primary SonicWALL occurs, the backup SonicWALL assumes the primary SonicWALL
LAN and WAN IP Addresses. There are three primary methods to check the status of the High
Availability pair: the Hardware Failover Status window, E-mail Alerts and View Log. These methods
are described in the following sections.
• Hardware Failover Status - One method to determine which SonicWALL is active is to check the
Hardware Failover Settings Status indicator on the Hardware Failover>Settings page. If the
primary SonicWALL is active, the first line in the page indicates that the primary SonicWALL is
currently Active. It is also possible to check the status of the backup SonicWALL by logging into
the LAN IP Address of the backup SonicWALL. If the primary SonicWALL is operating normally,
the status indicates that the backup SonicWALL is currently Idle. If the backup has taken over for
the primary, the status indicates that the backup is currently Active. In the event of a failure in the
primary SonicWALL, you can access the Management Interface of the backup SonicWALL at the
primary SonicWALL LAN IP Address or at the backup SonicWALL LAN IP Address. When the
primary SonicWALL restarts after a failure, it is accessible using the third IP address created