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

NE40E V800R010C00 Feature Description - WAN Access 01

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).
Basic Concepts

Basic Concepts

Network Flapping

Network flapping occurs when the physical status of interfaces on a network frequently alternates between Up and Down.

Alarm Burrs

An alarm burr is a process in which alarm generation and alarm clearance signals are received in a short period (The period varies with specific usage scenarios, devices, or service types).

For example, if a loss of signal (LOS) alarm is cleared 50 ms after it is generated, the process from the alarm generation to clearance is an alarm burr.

Alarm Flapping

Alarm flapping is a process in which an alarm is repeatedly generated and cleared in a short period (The period varies with specific usage scenarios, devices, or service types).

For example, if an LOS alarm is generated and cleared 10 times in 1s, alarm flapping occurs.

Key Parameters in Flapping Suppression

  • figure of merit: stability value of an alarm. A larger value indicates a less stable alarm.

  • penalty: penalty value. Each time an interface receives an alarm generation signal. Each time an interface receives an alarm clearance signal, the figure of merit value decreases exponentially.

  • suppress: alarm suppression threshold. When the figure of merit value exceeds this threshold, alarms are suppressed. This value must be smaller than the ceiling value and greater than the reuse value.

  • ceiling: maximum value of figure of merit. When an alarm is repeatedly generated and cleared in a short period, figure of merit significantly increases and, therefore, takes a long time to return to reuse. To avoid long delays returning to reuse, a ceiling value can be set to limit the maximum value of figure of merit. figure of merit does not increase when it reaches the ceiling value.

  • reuse: alarm reuse threshold. When this value is greater than that of figure of merit, alarms are not suppressed. This value must be smaller than the suppress value.
  • half-time: time used by figure of merit of suppressed alarms to decrease to half.

  • decay-ok: time used by figure of merit to decrease to half when an alarm clearance signal is received.

  • decay-ng: time used by figure of merit to decrease to half when an alarm generation signal is received.

Download
Updated: 2018-07-04

Document ID: EDOC1100027168

Views: 12068

Downloads: 40

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