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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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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).
VCAT_LOA

VCAT_LOA

Description

The VCAT_LOA is an alarm indicating that the virtual concatenation time delay crosses the threshold.

Attribute

Alarm Severity Alarm Type

Critical

Service alarm

Parameters

When you view an alarm on the network management system, select the alarm. In the Alarm Details field display the related parameters of the alarm. The alarm parameters are in the following format: Alarm Parameters (hex): parameter1 parameter2...parameterN. For details about each parameter, refer to the following table.

Name Meaning

Parameter 1

Indicates the logical port number, and the value is always 0x01.

Parameter 2, parameter 3

Indicates the VC trunk number that generates the alarm.

Impact on the System

During the service data transmission, when the alignment time of the virtual concatenation delay is over long, the timeslots cannot form a data frame. Accordingly, it causes the packet loss

Possible Causes

The possible cause of the VCAT_LOA alarm is as follows:

  • The SDH network delay crosses the compensation limit of the virtual concatenation delay.

Procedure

  1. Configure the cross-connect loopback to check whether the alarm is cleared.
  2. If the alarm persists, contact Huawei technical support engineers to handle the alarm.

Related Information

None

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Updated: 2019-01-21

Document ID: EDOC1100020975

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