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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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MPLS_PW_OAMFAIL

MPLS_PW_OAMFAIL

Description

The MPLS_PW_OAMFAIL is an alarm indicating that the OAM protocol negotiation fails. This alarm is reported when the OAM protocol negotiation fails on NEs at both ends of a PW.

Attribute

Alarm Severity Alarm Type

Minor

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 type of an OAM protocol negotiation failure.

  • 0x01: indicates that the OAM protocol negotiation is in the initial status, that is, the OAM protocol negotiation on NEs at both ends of the PW fails.

Impact on the System

When this alarm occurs, the PW APS protection switching is triggered, and services are switched to the protection PW.

Possible Causes

The possible causes of the MPLS_PW_OAMFAIL alarm are as follows:

  • Cause 1: The OAM function is only enabled on the NE at one end of the PW.

    The alarm is reported only by the NE on which the OAM function is enabled. As shown in Figure 4-11, only the local NE reports the MPLS_PW_OAMFAIL alarm.

    Figure 4-11  MPLS_PW_OAMFAIL alarm detection (1)
  • Cause 2: The PW has been interrupted when enabling the OAM function.

    As shown in Figure 4-12, when the PW is interrupted in the forward direction or reverse direction, the peer or local NE reports the MPLS_PW_OAMFAIL alarm.

    Figure 4-12  MPLS_PW_OAMFAIL alarm detection (2)

Procedure

  1. Cause 1: The OAM function is only enabled on the NE at one end of the PW.
    1. On the NMS, query this alarm and check whether the OAM function is enabled on NEs at both ends of the PW. If the OAM function is enabled only on one NE, set OAM Status to Enabled for the other NE.
    2. Check whether the alarm is cleared. If the alarm persists, go to 2.
  2. Cause 2: The PW has been interrupted when enabling the OAM function.
    1. On the NMS, check whether tunnel-related alarms are reported on the two ends of the PW. For example, MPLS_TUNNEL_OAMFAIL. If any of these alarms exist, clear them before you proceed.
    2. Check whether service-related alarms are reported by NEs at both ends of the PW. For example, MPLS_PW_LOCV. If any service-related alarms are reported, clear them immediately.
    3. Check whether the alarm is cleared. 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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