AudioCodes Mediant 4000 SBC User Manual page 677

CHAPTER 32 HA Configuration
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The following procedure describes how to configure monitored network entities through the Web
interface. You can also configure it through ini file [HaNetworkMonitor] or CLI ( configure
network > high-availability network-monitor).
➢
To enable and configure monitoring of network entities using pings:
1. Open the HA Settings page (Setup menu > IP Network tab > Core Entities folder > HA
Settings).
2. From the 'HA Network Monitor' (HAPingEnabled) drop-down list, select Enable:
3. In the 'Monitor Threshold' (HaNetworkMonitorThreshold) field, enter the minimum number of
failed ("Not Reachable") monitored rows that are required to trigger an HA switchover:
4. Open the HA Network Monitor table (Setup menu > IP Network tab > Core Entities folder >
HA Network Monitor).
5. Click New; the following dialog box appears:
The HA Network Monitor feature is a license-based feature (which is part of the
general HA license) and is available only if it is included in the License Key that is
installed on the device.
Switchover decisions of the HA Network Monitor feature are non-functional under
the following conditions:
✔
HA is disabled (i.e., active device is in standalone mode).
✔
The HA Preempt Priority feature is used (enabled by the 'Preempt Mode' and
'Preempt Priority' parameters).
✔
The number of Ethernet Groups (Ethernet links) on the redundant device that
are in "up" status are less than on the active device.
Destinations that have never replied to the device's pings are not used to determine
reachability status and the unreachability threshold for triggering a switchover.
They need to reply at least once to the device's pings in order to participate in the
device's logic for this feature.
Once a switchover occurs, the device does not perform switchover loops due to
continued ping failures with the monitored row(s). Once a switchover occurs, the
device changes the status of the monitored row(s) to "Reachability Unverified". A
second switchover occurs only if the row(s) become reachable again and then
unreachable.
The following SNMP alarms are related to the HA Network Monitor feature:
✔
acHASystemFaultAlarm: This alarm is sent to indicate that you have
configured the HA Network Monitor feature, but switchover decisions are non-
functional (see above).
✔
acHANetworkMonitorAlarm: This alarm is sent to indicate that all destinations
of a specific row in the HA Network Monitor table that replied in the past to the
device's pings are now "unreachable".
✔
acHASystemSwitchOverAlarm: This alarm is sent to indicate that an HA
switchover has occurred due to the HA Network Monitor feature.
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Mediant 4000 SBC | User's Manual