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Alarm Handling

AR100, AR120, AR160, AR1200, AR2200, AR3200, and AR3600 V300R003

This document provides the trap description, attributes, parameters, impact on the system, possible causes, procedures, and references. This document provides a complete set of traps, through which intended readers are kept of the running status of the device so as to locate faults.

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L2V_1. hwPWVcSwitchWtoP

L2V_1. hwPWVcSwitchWtoP


L2V/4/PWE3VC_W2P_T:OID [oid] The status of the PWE3 VC turned protecting from working. ( VcId=[GAUGE], VcType=[INTEGER], CtrlWord=[INTEGER], SecondaryPwId=[GAUGE], HWL2VpnStateChangeReason=[INTEGER], InterfaceName=[STRING])

Indicates that a PW changes from the primary state to the secondary state.


Alarm ID Alarm Severity Alarm Type




Name Meaning
oid Indicates the MIB object ID of the alarm.
VcId Indicates the ID of a VC.

Indicates the type of a VC:

  • 0: Initial value
  • 1: FR
  • 2: ATM AAL5
  • 3: ATM cell relay
  • 4: VLAN
  • 5: Ethernet
  • 6: HDLC
  • 7: PPP
  • 9: ATM cell VCC
  • 10: ATM cell VPC
  • 11: IP-layer 2 (used for heterogeneous IP-interworking between Huawei devices and non-Huawei devices)
  • 12: ATM, 1-to-1 VCC cell mode
  • 13: ATM, 1-to-1 VPC cell mode
  • 14: ATM, AAL5 PDU VCC Transport
  • 64: Heterogeneous IP-interworking

Indicates whether the control word is enabled:

  • 1: enabled
  • 2: disabled
SecondaryPwId Indicates the remote CE ID of the VC in the Protecting state.
HWL2VpnStateChangeReason Indicates the cause for the VC status change. For details, refer to hwPwStateChangeReason in the appendix of HUAWEI-PWE3-MIB.
InterfaceName Indicates the interface name.

Impact on the System

Packet loss in millisecond may occur in the switching process. The packet loss, however, affects little to the PWE3 service.

Possible Causes

The VLL service is switched from the primary PW to the secondary PW.


  1. Rectify the fault according to the solution to the hwPWVcDown trap. Then, check whether the fault is rectified.

    • If so, go to Step 3.
    • If not, go to Step 2.

  2. Collect alarm information and configuration information, and then contact technical support personnel.
  3. End.
Updated: 2019-03-06

Document ID: EDOC1100041475

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