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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).
IMA_GROUP_LE_DOWN

IMA_GROUP_LE_DOWN

Description

The IMA_GROUP_LE_DOWN alarm indicates that the IMA protocol is not enabled on the local NE or the number of activated links in an IMA group is smaller than the preset minimum number of activated links.

Attribute

Alarm Severity Alarm Type

Major

Equipment alarm

Parameters

None.

Impact on the System

Services in the IMA group are interrupted.

Possible Causes

Possible causes of the IMA_GROUP_LE_DOWN alarm are as follows:

  • The IMA group configurations at the local end are different from those at the opposite end.
  • The number of activated links in the local IMA group is smaller than the preset minimum number of activated links.
  • The IMA group at the local end is in the blocked or startup state.

Procedure

  1. Check whether IMA group configurations at the local end are different from those at the opposite end.

    If... Then...

    The IMA group configurations are inconsistent

    1. Perform operations as described in Configuring IMA in the Feature Description.
    2. On the U2000, set IMA Protocol Enable Status to Enabled for the local NE.

    The IMA group configurations are consistent

    Go to the next step.

  2. On the U2000, check whether the ALM_IMA_LIF alarm has been reported.

    If... Then...

    This alarm persists

    1. Clear the ALM_IMA_LIF alarm and activate the member links in the local IMA group.
    2. When the actual number of activated links reaches the configured minimum activated link number, the IMA_GROUP_LE_DOWN alarm will be cleared automatically.
    3. Optional: Add member links in the local IMA group.

    The alarm is cleared

    Go to the next step.

  3. Check whether the local IMA group is in a blocked or startup state.

    If... Then...

    The T_ALOS or R_LOS alarm is reported

    Clear the T_ALOS or R_LOS alarm first. Check whether the IMA_GROUP_LE_DOWN alarm is cleared. If the IMA_GROUP_LE_DOWN alarm persists, go to the next step.

    No T_ALOS or R_LOS alarm is reported

    No further action is required.

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Updated: 2019-01-21

Document ID: EDOC1100020975

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