Alarm History; Cold Start Trap; Performance Measurements For A Third-Party System - AudioCodes Mediant 1000 User Manual

8.1.2.2

Alarm History

The board maintains a history of alarms that have been raised and traps that have been
cleared to allow an EMS to recover any lost raise or clear traps. Two views of the alarm
history table are supported by the agent:
acAlarmHistoryTable in the enterprise AcAlarm
nlmLogTable and nlmLogVariableTable in the standard NOTIFICATION-LOG-MIB
As with the acActiveAlarmTable, the acAlarmHistoryTable is a simple, one-row per alarm
table, that is easy to view with a MIB browser.
8.1.3

Cold Start Trap

Mediant 1000 technology supports a cold start trap to indicate that the unit is starting. This
allows the EMS to synchronize its view of the unit's active alarms. In fact, two different
traps are sent at start-up:
The standard coldStart trap - iso(1).org(3).dod(6).internet(1). snmpV2(6).
snmpModules(3). snmpMIB(1). snmpMIBObjects(1). snmpTraps(5). coldStart(1) sent
at system initialization.
The enterprise acBoardEvBoardStarted, which is generated at the end of system
initialization. This is more of an "application-level" cold start sent after all the initializing
process is over and all the modules are ready.
8.1.4

Performance Measurements for a Third-Party System

Performance Measurements are available for a Third-Party Performance Monitoring
System through an SNMP interface and can be polled at scheduled intervals by an external
poller or utility in the management server or other off board system.
The Mediant 1000 provides performance measurements in the form of two types:
Gauges - Gauges represent the current state of activities on the media server.
1.
Gauges unlike counters can decrease in value and like counters, can increase. The
value of a gauge is the current value or a snapshot of the current activity on the media
server at that moment.
Counters - Counters always increase in value and are cumulative. Counters, unlike
2.
gauges, never decrease in value unless the server is reset and then the counters are
zeroed.
The Mediant 1000 performance measurements are provided by several proprietary MIBs
(located under the "acPerformance" sub tree:
iso(1).org(3).dod(6).internet(1).private(4).enterprises(1).AudioCodes(5003).acPerform
ance(10).
There are two formats of Performance Monitoring MIBs:
Older Format
1.
Each MIB is made up of a list of single MIB objects, each relating to a separate
attribute within a gauge or counter. All counters and gauges give the current time
value only.
•
acPerfMediaGateway - a generic-type of PM MIB that covers:
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User's Manual
Control protocol
RTP stream
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Digital Mediant 1000
Document # LTRT-66401