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74 Chapter 2 Fault Management System

P0609330 2.0

SNMP Traps

A trap is a signal that tells a program that an event occurred in the system. When a program

receives a signal, a specific set of activities take place.

The SNMP system enables SNMPv1 traps to be generated based on all or a subset of NT Events

generated on the Business Communications Manager. Any information sent to the BCM Windows

NT event log and shown in the Alarm Banner and Alarm Browser can generate an SNMP trap.

SNMP traps received from Business Communications Manager contain descriptions of the alarms

that occur in the system. Additionally, SNMP generic traps such as coldStart, linkDown, linkup,

authenticationFailure, are also generated from the Business Communications Manager, depending

on the user’s configuration.

For the BCM to generate SNMP traps, you must configure how the system handles SNMP trap

notifications. When SNMP is enabled, events arriving in the alarm database trigger an SNMP trap

message to be generated. Use the alarm manager to enable or disable sending of all or some types

of SNMP traps.

The trap format is specified in the BCM “Small Site Event MIBs” on page 472 and is captured and

viewed through any standard SNMP fault monitoring framework or trap watcher (see “Appendix

A Management Information Base (MIB) System).

BCM alarm and SNMP trap list

The complete set of BCM Alarms and SNMP traps is provided (see “Component ID (alarm)

summary information” on page 92). You can also view the BCM Alarms list using the following

methods:

1 Access the Unified Manager Maintenance page. Select the heading “Alarms and Traps”. The

Alarms and Traps selection presents a list of the events (see Table 12 on page 92).The events

are organized by event source.

2 Contact your Business Communications Manager Nortel Networks Systems Engineer,

Services organization, or PLM and request a list in Excel spreadsheet format.

Alarm banner, NT event database, and SNMP trap correlation

Although the same events (alarms) are reported in the Unified Manager Alarm System, made

available remotely via SNMP traps and recorded in the NT Event logs, the terminology used to

denote severity levels is not the same.

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