display ap radio-environment

Function

The display ap radio-environment command displays air interface environment information about AP radios.

Format

display ap radio-environment { ap-name ap-name | ap-id ap-id } [ radio radio-id ]

Parameters

Parameter	Description	Value
ap-name ap-name	Displays air interface environment information about radios of the AP with a specified name.	The AP name must exist.
ap-id ap-id	Displays air interface environment information about radios of the AP with a specified ID.	The AP ID must exist.
radio radio-id	Displays air interface environment information about the AP radio with a specified ID.	The radio ID must exist.

Views

All views

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When WLAN access experience is poor, you can run this command to view air interface environment information and Wi-Fi interference sources. The interference can be determined based on the noise floor, signal to interference plus noise ratio (SINR), co-channel interference, and adjacent-channel interference. After this command is executed, radio scanning of the AP is automatically enabled, and the AP starts to scan the air interface environment of radios. You can run this command again to view air interface environment scanning results.

Precautions

When you run this command for the first time, no air interface environment scanning result is displayed. To view air interface environment scanning results, run this command again.

After AP radio scanning is enabled using this command, the air interface performance of an AP is affected. If this command is not executed again after five minutes, AP radio scanning is automatically disabled.

If the radio radio-id parameter is not specified, air interface environment information about all radios of the AP is displayed.

In the scanning result, the channel utilization, co-channel interference, and adjacent-channel interference are calculated with the impact of non-Wi-Fi interference. However, non-Wi-Fi interference devices are not displayed in the interference source list.

Example

# Display air interface environment information about radio 0 of AP 1.

<HUAWEI> display ap radio-environment ap-id 1 radio 0
Warning: This operation will enable scanning for the specified radio, affecting AP's air interface performance. 
Scanning will be automatically disabled 5 minutes after you run this command. Continue? [Y/N]y 
Info: This operation may take a few seconds. Please wait for a moment.done.
p:            permit
i:            interference
Ch:           Channel
CU:           Channel Utility
NF:           Noise Floor
CommIf:       Common-Channel Interference
AdjaceIf:     Adjacent-Channel Interference
SINR:         Signal to Interference and Noise Ratio 
#AP:          Number of APs detected
Radio:        0
ScanChannel:  1
WorkChannel:  1
ScanCycle:    1
---------------------------------------------------------------------------
Ch  NF   CU(%) CommIf(%) AdjaceIf(%) SINR      #APs
---------------------------------------------------------------------------
1   -105 75    19        -           245       57 
---------------------------------------------------------------------------
Total: 1
---------------------------------------------------------------------------
Ch    MAC            Type  RSSI  SSID
---------------------------------------------------------------------------
1     c88d-833a-8d41 i     -65   xw9-2g-tunnel 
------------------------------------------------
Total: 1

**Table 1** Description of the **display ap radio-environment** { **ap-name** *ap-name* | **ap-id** *ap-id* } [ **radio** *radio-id* ] command output
Item	Description
Radio	Radio on which the air interface environment is scanned.
ScanChannel	Scanning channel.
WorkChannel	Working channel of the AP.
ScanCycle	Scanning count.
Ch	Channel that has scanned a device.
NF	Noise floor.
CU(%)	Channel utilization.
CommIf(%)	Co-channel interference.
AdjaceIf(%)	Adjacent-channel interference.
#APs	Number of scanned APs.
SINR	Signal to interference plus noise ratio (SINR).
MAC	MAC address of the scanned device.
Type	Type of the scanned interference device. i: WIDS device p: Non-WIDS device
RSSI	RSSI of the scanned device.
SSID	SSID to which the scanned device is connected.

If an AP detects that a channel has a high co-channel interference (higher than 50%), another Wi-Fi device is using this channel and affects the local AP. In this case, it is recommended that the AP channel be switched using radio calibration or other methods.