Monitoring Ip Entity And Ha Switchover Upon Ping Failure - AudioCodes Mediant 4000 SBC User Manual

User's Manual
33.4 Monitoring IP Entity and HA Switchover upon Ping
Failure
The device can monitor a specified network entity, using pings. If the device does not
receive a ping response from the entity, a switchover to the redundant device occurs. The
switchover happens only if a ping was initially successful and then a subsequent ping
failed. The feature is referred to as HA Network Reachability. The feature can be used, for
example, to check connectivity with a nearby router (first hop) that the device uses to reach
other destinations.
The network entity is defined by IP address. The IP interface from where the ping is sent
can be selected from one of the device's configured network interfaces in the IP Interfaces
table.
Note:
•
The HA Network Reachability feature is not functional under the following
conditions:
√
√
√
•
If you have configured the HA Network Reachability feature, but the feature is not
operational (see note above), the device sends the SNMP trap event,
acHANetworkWatchdogStatusAlarm to notify of the situation.
•
If a switchover occurs due to no ping reply, the device sends the SNMP trap
alarm, acHASystemFaultAlarm to notify of the switchover due to the HA Network
Reachability feature.
•
For a detailed description of the HA ping parameters, see ''HA Parameters'' on
page 836.

To configure monitoring of IP entity using pings:
1. Open the HA Settings page (Setup menu > IP Network tab > Core Entities folder >
HA Settings).
2. Configure the following:
•
From the 'HA Network Reachability' (HAPingEnabled) drop-down list, select
Enable.
•
In the 'Destination Address' field, enter the address of the IP entity that you want
to monitor.
•
In the 'Source Interface Name' field, enter the device's IP network interface from
where you want to ping the destination entity.
•
In the 'Ping Timeout' field, enter the timeout for which the ping request waits for a
response.
Version 7.2
HA is disabled (i.e., active device is in standalone mode).
HA Preempt Priority is used (to prevent endless loops of switchovers).
Number of Ethernet Groups in the redundant device that are in "up" state are
less than on the active device (to prevent endless loops of switchovers).
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33. HA Configuration
Mediant 4000 SBC