No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


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.

Rate and give feedback:
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).
WLAN_1. hwRadioChannelChangedTrap

WLAN_1. hwRadioChannelChangedTrap


WLAN/4/RADIO_CHANNEL_CHANGE_NOTIFY:OID [oid] Channel of radio is changed. (APMAC=[OPAQUE], RadioID=[INTEGER], APName=[OCTET], Channel1=[INTEGER], Channel2=[INTEGER], CauseId=[INTEGER], CauseStr=[OCTET], PreChannel1=[INTEGER], PreChannel2=[INTEGER], APID=[INTEGER])

The AP channel was changed.


Alarm ID Alarm Severity Alarm Type Warning environmentalAlarm(6)


Name Meaning
OID Indicates the ID of the MIB object.
APMAC Indicates the MAC address of an AP.
RadioID Indicates the radio ID.
APName Indicates the AP name.
Channel1/Channel2 Indicates the actual working channel of the AP.
CauseId Indicates the channel change reason.
  • 1: unknown(1) - The channel was changed due to an unknown reason.
  • 2: dfs(2) - The channel was changed due to Dynamic Frequency Selection (DFS).
  • 3: wds(3) - The channel was changed due to WDS network establishment.
  • 4: config(4) - The channel was changed due to manual configurations.
  • 5: calibrate(5) - The channel was changed due to radio calibration.
CauseStr Indicates a character string describing channel change reasons.
PreChannel1/PreChannel2 Indicates the channel before change.

When an AP goes online on an AC for the first time, the channel of the AP before change is not saved on the AC. Therefore, when a channel change alarm is generated for the first time, the original channel of the AP is displayed as 255 in the alarm.

APID Indicates the AP ID.

Impact on the System

The working channel of the AP was changed, which may affect the other APs.

Possible Causes


The radio was calibrated.


Users changed the channel.


Radar signals conflicted.


The channel changed in WDS mode.


  1. No action is required.

Related Information


Updated: 2019-03-06

Document ID: EDOC1100041475

Views: 101123

Downloads: 61

Average rating:
This Document Applies to these Products

Related Version

Related Documents

Previous Next