WLAN_1.3.6.1.4.1.2011.6.139.16.1.1.1.2 hwRadioSignalEnvDeteriorationTrap

Description

WLAN/4/RADIO_ENV_DETERIORATE:OID [oid] Radio signal environment deteriorates. (APMAC=[OPAQUE], RadioID=[INTEGER], APName=[OCTET], PER=[INTEGER]%, RetransmissionRate=[INTEGER]%, APID=[INTEGER], NoiseFloor=[INTEGER]dBm, Reason=[OCTET], BadChannel=[INTEGER], InterferenceRate=[INTEGER])

Radio signal environment deteriorates.

Attribute

Alarm ID	Alarm Severity	Alarm Type
1.3.6.1.4.1.2011.6.139.16.1.1.1.2	Warning	other(1)

Parameters

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.
PER	Indicates the packet error rate on the wireless-side interface.
RetransmissionRate	Indicates the retransmission rate of a radio.
APID	Indicates the AP ID.
NoiseFloor	Indicates the noise floor value detected in the current environment.
Reason	Indicates the reason of the alarm. ConflictRate: High retransmission rate In this case, you only need to pay attention to the parameter RetransmissionRate. Other parameters with the value 0 can be ignored. Noise: High noise floor In this case, you only need to pay attention to the parameter NoiseFloor. Other parameters with the value 0 can be ignored. BadChannel: Channel deterioration In this case, you only need to pay attention to the parameter BadChannel. Other parameters with the value 0 can be ignored. InterferenceRate: High interference rate In this case, you only need to pay attention to the parameter InterferenceRate. Other parameters with the value 0 can be ignored.
BadChannel	Indicates the bad channel.
InterferenceRate	Indicates the interference rate.

Impact on the System

The frequency band of a radio is changed.

Possible Causes

Cause 1: The radio signal environment deteriorates. The AP automatically switches the frequency band and sends a message to the AC, which will update related attributes.
Cause 2: The AC switches the radio.
Cause 3: The AP detects that the number of Beacon Miss events reaches the threshold and notifies the AC.

Procedure

Run the display ap neighbor command to view the neighboring radio, and check whether there are APs using the same or neighboring radio.
- If so, run the channel command to reconfigure a channel or power for this radio to avoid the signal interference. Then go to 2.
- If not, go to 3.
Check whether a radio signal environment restoration alarm is generated.
- If so, go to 6.
- If not, go to 3.
Check whether there are devices that interfere with the radio signal or make noises.
- If so, remove these devices and then go to 4.
- If not, go to 5.
Check whether a radio signal environment restoration alarm is generated.
- If so, go to 6.
- If not, go to 5.
Collect the alarm information, log information, and configuration information, and then contact technical support personnel.
End.

Related Information

WLAN_1.3.6.1.4.1.2011.6.139.16.1.1.1.3 hwRadioSignalEnvResumeTrap