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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_LOM_VC4

VCAT_LOM_VC4

Description

The VCAT_LOM_VC4 alarm indicates that multiframe of the VC-4 virtual concatenation is lost. When the system detects that the multi-frame indicator (MFI) field of the H4 byte of VC-4 timeslots is illegal, the system reports the VCAT_LOM_VC4 alarm.

Attribute

Alarm Severity Alarm Type

Major

Communication 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-4 path number that generates the alarm.

Impact on the System

If the LCAS function is disabled, the services are interrupted during data transmission.

Possible Causes

Possible causes of the VCAT_LOM_VC4 alarm are as follows:

  • The MFI at the opposite end of the virtual concatenation is inconsistent with that at the local end.

  • Bit errors occur or the SDH physical path is interrupted.

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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