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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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ERRDOWN_1. hwErrordown

ERRDOWN_1. hwErrordown


ERRDOWN/4/ErrordownOccur: OID [oid] Error-down occured. (Ifindex=[INTEGER], Ifname=[STRING], Cause=[STRING])

The alarm was generated when an errordown event occurred.


Alarm ID Alarm Severity Alarm Type Warning communicationsAlarm(2)


Name Meaning


Indicates the MIB object ID of the alarm.


Index of an interface


Interface name


Cause of the errordown event

Impact on the System

After the errordown event occurs, traffic cannot be forwarded on relevant interfaces and services are interrupted.

Possible Causes

The faults detected by service modules triggered errordown events. The possible causes are as follows:
  • The MSTP edge port received BPDU packets.


  1. Locate the fault based on the value of the Cause field in the alarm.

    • If the value of the Cause field is bpdu-protection, go to Step 2.

  2. Check whether the interface is specified as an edge port.

    • If the interface is not specified as an edge port, go to Step 3.

    • If the interface is specified as an edge port, go to Step 4.

  3. Perform the following steps.

    • Run:

      interface interface-type interface-num

      The interface view is displayed.

    • Run:

      undo stp edged-port and undo shutdown

      The edge port configuration is removed. Check whether the log still exists. If the log still exists, go to Step 4.

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

Document ID: EDOC1100041475

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