Introduction To Fault Management; Principles; Concepts - Huawei AR530 Series Configuration Manual

Huawei AR530&AR550 Series Industrial Switch Routers
Configuration Guide - Device Management

5.1 Introduction to Fault Management

This section describes the definition and functions of fault management.
Definition
Fault management efficiently manages and reports alarms or events generated on a device in a
centralized manner.
Purpose
The network expands and becomes more complex. When a module on a device is faulty, a great
number of alarms may be generated on one or more devices. The alarms, however, may be lost
when being sent to the NMS due to limited capability of handling alarms on the devices or the
NMS. As a result, certain needed alarms cannot be displayed, which inconveniences network
management.
To collect valid fault information on the NMS in an efficient way, configure the alarm severity
and alarm reporting delay function to efficiently manage and report alarms and events in a
centralized manner.

5.2 Principles

This section describes the implementation principle of fault management.

5.2.1 Concepts

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Alarm:
An alarm is generated when a device notifies users of a fault. Maintenance personnel learn
the device running status and locate faults based on alarms.
Active alarm:
An active alarm is the notification of generating an alarm. For example, the hwFanInvalid
alarm indicates that the fan is faulty.
Clear alarm:
A clear alarm is the notification of clearing an alarm. For example, the
hwFanInvalidResume alarm indicates that the fan fault is rectified.
NOTE
Each active alarm maps a clear alarm.
Root-cause alarm:
A root-cause alarm causes other alarms. For example, an unreachable route is caused by
the interface fault. The alarm generating due to an interface fault is a root-cause alarm.
Non-root-cause alarm:
Non-root-cause alarms are caused by the root-cause alarm. For example, an unreachable
route is caused by the interface fault. The alarm generating due to the unreachable route is
a non-root-cause alarm.
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