IP Network Failover statistics

The IP Network Failover page displays detailed IP Network Failover status and statistics that may aid in troubleshooting network communication problems. The IP Network Failover feature provides a dynamic method for selecting the default gateway. If IP Network Failover is properly configured and enabled, it overrides the Gateway Priority setting in the Advanced Network Settings. If failover is off/disabled, the non-failover gateway configuration is enabled. To configure IP Network Failover, use the Network > IP Network Failover page; see IP Network Failover settings. To configure the non-failover default gateway priority list, use the Configuration > Network > Advanced Network Settings page; see Advanced Network Settings.

Field	Description
Current Default Gateway Status	The current status of the default gateway, including the interface name, default gateway IP address, and how the default gateway was configured (Failover or Non-Failover).
Current Network Failover Status	The current status of the Network Failover feature's management of the default gateway. Failover State: The current configured state of IP Network Failover (On or Off). Fallback to Non-Failover: The current configured state of the IP Network Failover option to fall back to Non-Failover (On or Off). When an IP Network Failover cannot configure a default gateway, it uses the fallback option. Failure to configure a default gateway could occur if one or more interfaces are not enabled (On) for IP Network Failover use, or if those enabled interfaces are not Up or do not have a gateway associated with them. Interface Table: The current status of all available IP network interfaces. The table is displayed in order of the interface priority configured in the IP Network Failover settings. For each network interface, the following information is displayed: Priority: The interface priority that Network Failover uses. The highest priority is 1, which is the first interface in the configured Failover Interface Priority list. Interface: The name of the network interface. Status: The current failover status of this network interface. Status values include: 1 - Responding: The interface is up and configured in the system. It is currently responding to the link tests. This interface is suitable for use as the default gateway. 2 - Up: The interface is up and configured in the system. Its status has not been determined by the link tests, or no link tests are configured. This interface may be suitable for use as the default gateway. 3 - Not Responding: The interface is up and configured in the system. However, it is not currently responding to the link tests, and the number of consecutive test failures has reached the threshold number configured in the IP Network Failover settings. This interface may be suitable for use as the default gateway. 4 - Down: The interface is down or not configured in the system. However, it is not currently responding to the link tests. This interface is not suitable for use as the default gateway. 5 - Unknown: The interface is unknown (does not exist) in the system. This interface is not suitable for use as the default gateway. The number displayed for each status value indicates the priority of that status. Failover uses this value to select the interface for the default gateway. Status priority 1 is the most suitable for use, with lower priorities considered suitable if there are no interfaces at the highest priority. The interface list is maintained in the interface priority order configured in the Network Failover settings. When any interface changes status, the interface list is examined for the interface that has the highest status priority, nearest the start of the list. The highest priority interface with a Responding status becomes the default gateway. If there is no interface marked as Responding then the highest Up interface becomes the default gateway. Gateway: The gateway IP address associated with the interface, or 0.0.0.0 if the interface does not have an associated gateway. An interface with no gateway is not suitable for use as the default gateway. State: The Network Failover enabled state (On or Off) for this interface. The On state means failover is monitoring this interface, and the Off state means failover is not using this interface for failover purposes. Tests: The number of Link Tests (0, 1 or 2) that are configured for this interface.
Current Network Gateway Status (Non-Failover)	This information reports the status of the non-failover management of the default gateway. If Network Failover is enabled (On) and can successfully configure a default gateway, failover always overrides the non-failover Gateway Priority configuration. Interface Table: The current status of all available IP network interfaces. The table is displayed in order of the interface priority configured in the Advanced Network Settings. For each network interface, the following information is displayed: Priority: The priority of the interface configured in the Advanced Network Settings. The highest priority is 1, which is the first interface in the configured Advanced Network Settings Interface Priority list. Interface: The name of the network interface. Status: The current status of this network interface. Possible status values and their meanings: 1 - Up: The interface is up and configured in the system. This interface is suitable for use as the default gateway. 0 - Down: The interface is down or not configured in the system. This interface is not suitable for use as the default gateway. The Interface Priority order configured in the Advanced Network Settings maintains the interface list. When any interface changes status, the interface list is examined for the interface that has the highest status priority, nearest the start of the list. The highest priority interface with an Up status becomes the default gateway. Gateway: The gateway IP address associated with the interface, or 0.0.0.0 if the interface does not have an associated gateway. An interface with no gateway is not suitable for use as the default gateway.
Current Failover Link Test Statistics	These statistics indicate the successes and failures of the configured link tests. The Network Failover feature uses these statistics to manage the default gateway. For each network interface, the following counters are maintained and reported. The values indicate the total number for each interface and category, since the Digi device was last powered on or rebooted. Test Success: The total number of successful link tests. A link test is successful if either of the configured tests (primary or secondary destination) succeeds. When a link test succeeds, the interface is reported as “Responding”. Test Failure: The total number of failed link tests. A link test fails if both of the configured tests (primary or secondary destination) fail, or if only one link test is configured and it fails. If two link tests are configured, and both of them fail, that is counted as a single link test failure for the purpose of counting failures. Bypass Test: The total number of bypassed link tests that did not run for a number of possible reasons. A link test is bypassed if no destinations are configured, if the interface has no associated gateway, if the interface goes down while a test is in progress, or if failover is disabled (turned off) while a test is running (disabled as a feature or for the interface being tested). Consecutive Failures: The current number of consecutive link test failures for the interface. When the number of consecutive failures reaches the threshold configured in the Network Failover settings, the interface is reported as “Not Responding” and the default gateway may be changed as a result. When a link test is successful, or when the interface goes down and comes back up, the consecutive failures counter is reset to zero. Link Not Responding: The total number of link test failures that occurred for the interface after it has been reported as “Not Responding”. This counter allows you to determine how much time an interface is in the “Not Responding” state.