No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

Configuration Guide - Device Management

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of Device Management, including device status query, hardware management, Information Center Configuration, NTP, Synchronous Ethernet Configuration, Fault Management Configuration, Energy-Saving Management Configuration, Performance Management Configuration, Maintenance Assistant Configuration, and OPS Configuration.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Alarm Correlation

Alarm Correlation

When an NE on the network is faulty, the system reports the predictable network faults to the NMS. Each fault triggers multiple alarms, affecting the efficiency for locating faults. Some alarms are triggered by the same fault, so they are associated with each other. The alarm correlation function can analyze the association among alarms generated in the system and determine root-cause and non-root-cause alarms. After alarm correlation suppression is configured, the system reports only root-cause alarms to the NMS, improving the efficiency for locating faults. Alarm correlation reduces the number of reported non-root-cause alarms, reducing the network load, and helping quickly locate faults.

Alarm correlation includes alarm correlation analysis and alarm correlation suppression.
  • Alarm correlation analysis

    Alarm correlation analysis is performed based on the alarm definition, including the fault time window, fault rectification time window, what the root-cause alarm is, and the method of association with the root-cause alarm. After receiving an alarm, the fault management module analyzes the alarm correlation within the duration specified by the fault time window, and sends the alarm with the analysis result to the NMS.

    Figure 7-1 shows the alarm correlation analysis flow.
    Figure 7-1 Alarm correlation analysis flow

    The status of an alarm can be:

    • Active & Independent: An active root-cause alarm is in the period specified by the fault time window.
    • Active & Dependent: An active non-root-cause alarm is in the period specified by the fault time window.
    • Persistent Event: An alarm enters the active alarm queue.
    • Filtered Out: An alarm and its clear alarm are both deleted from the active alarm queue.

    The process of alarm correlation analysis is as follows:

    1. If an alarm is considered as a root-cause alarm, it is suppressed for a period specified by the fault time window.
    2. If an alarm is considered as a non-root-cause alarm, it is suppressed for a period specified by the fault time window of its parent alarm.
    3. When the duration specified by the fault time window of the root-cause alarm expires, the system sends both the root-cause and non-root-cause alarms.
    4. If the clear alarm of a non-root-cause alarm is generated within the duration specified by the fault time window, the system deletes them both.
    5. If the clear alarm of a root-cause alarm is generated within the duration specified by the fault time window, the system deletes them both.
    6. If the root-cause alarm of an alarm is not generated within the duration specified by the fault time window, the system considers this alarm as a root-cause alarm.
    7. If the root-cause alarm of an alarm is generated within the duration specified by the fault time window, the system considers this alarm as a non-root-cause alarm.
  • Alarm correlation suppression

    When alarm correlation analysis is complete, an alarm carries an identifier indicating a root-cause alarm or a non-root-cause alarm. Before sending an alarm to the SNMP agent, the system checks whether NMS-based alarm suppression has been configured for non-root-cause alarms.

    • If so, the system filters out non-root-cause alarms and sends only root-cause alarms to the NMS.
    • If not, the system sends both root-cause alarms and non-root-cause alarms to the NMS.
Translation
Download
Updated: 2019-04-20

Document ID: EDOC1100075362

Views: 24967

Downloads: 102

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next