Cold Start Trap; Third-Party Performance Monitoring Measurements - AudioCodes Mediant 1000 User Manual

16.3

Cold Start Trap

Mediant 1000 technology supports a cold start trap to indicate that the device is starting.
This allows the manager to synchronize its view of the device's active alarms. 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 the entire
initializing process is complete and all the modules are ready.
16.4

Third-Party Performance Monitoring Measurements

Performance measurements are available for a third-party performance monitoring system
(or EMS) through an SNMP interface. These measurements can be polled at scheduled
intervals by an external poller or utility in a media server or other off-device system.
The device provides two types of performance measurements:
Gauges: Gauges represent the current state of activities on the device. 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 device.
Counters: Counters always increase in value and are cumulative. Counters, unlike
gauges, never decrease in value unless the off-device system is reset. The counters
are then zeroed.
Performance measurements are provided by several proprietary MIBs that are located
under the acPerformance sub tree:
iso(1).org(3).dod(6).internet(1).private(4).enterprises(1).audioCodes(5003).acPerformance(
10)
Two formats of performance monitoring MIBs are available:
Old format (obsolete as of version 4.6):
Each MIB is composed of a list of single MIB objects, each relates to a separate
attribute within a gauge or a counter. All counters and gauges provide the current time
value only.
•
acPerfMediaGateway: a generic-type of PM MIB that covers:
♦
♦
♦
•
acPerfMediaServices: media services devices specific performance MIB.
•
acPerfH323SIPGateway: holds statistics on Tel to IP and vice versa.
New format:
The following MIBs feature an identical structure. Each includes two major sub-trees.
•
Configuration sub tree – enables configuration of general attributes of the MIB
and specific attributes of the monitored objects.
•
Data sub tree
The monitoring results are presented in tables. Each table includes one or two indices.
When there are two indices, the first index is a sub-set in the table (e.g., trunk number)
and the second (or a single where there is only one) index represents the interval
number (present - 0, previous - 1 and the one before - 2).
The MIBs include:
•
acPMMedia: for media (voice) related monitoring (e.g., RTP, DSP's).
•
acPMControl: for Control-Protocol related monitoring (e.g., connections,
commands).
SIP User's Manual
Control protocol
RTP stream
System packets statistics
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Mediant 1000
Document #: LTRT-83301