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SonicOS 5.8.1 Administrator Guide
When using logical monitoring, the HA Pair will ping the specified Logical Probe IP address
target from the Primary as well as from the Backup SonicWALL. The IP address set in the
Primary IP Address or Backup IP Address field is used as the source IP address for the ping.
If both units 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, the HA Pair will failover to the SonicWALL that can ping the target.
The configuration tasks on the High Availability > Monitoring page are performed on the
Primary unit and then are automatically synchronized to the Backup.
To set the independent LAN management IP addresses and configure physical and/or logical
interface monitoring, perform the following steps:
Step 1 Login as an administrator to the SonicOS user interface on the Primary SonicWALL.
Step 2 In the left navigation pane, navigate to High Availability > Monitoring.
Step 3 Click the Configure icon for an interface on the LAN, such as X0.
.
Step 4 To enable link detection between the designated HA interfaces on the Primary and Backup
units, leave the Enable Physical Interface Monitoring checkbox selected.