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xDSL Network Module for the UTM9S and UTM25S
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ProSecure Unified Threat Management (UTM) Appliance
When the UTM9S or UTM25S is configured in auto-rollover mode, it uses the selected WAN
failure detection method to detect the status of the primary link connection at regular
intervals. Link failure is detected in one of the following ways:
• DNS queries sent to a DNS server
• Ping request sent to an IP address
• None (no failure detection is performed)
From the primary interface, DNS queries or ping requests are sent to the specified IP
address. If replies are not received after a specified number of retries, the primary interface is
considered down, and a rollover to the backup interface occurs. When the primary interface
comes back up, another rollover occurs from the backup interface back to the primary
interface. The WAN failure detection method that you select applies only to the primary
interface, that is, it monitors the primary link only.
Configure Auto-Rollover Mode
To configure auto-rollover mode:
1. Select Network Config > WAN Settings > WAN Mode. The WAN Mode screen
displays:
Figure 330.
2. In the Load Balancing Settings section of the screen, configure the following settings:
a. Select the Primary WAN Mode radio button.
b. From the corresponding drop-down list on the right, select the DSL interface or a
WAN interface to function as the primary WAN interface.
If you select the DSL interface, both WAN interfaces become disabled; if you select a
WAN interface, the DSL interface and the other WAN interface become disabled.
c. Select the Auto Rollover check box.