display channel switch-record

Function

The display channel switch-record command displays channel switching records on the device.

Format

display channel switch-record { all | calibrate | ap-name ap-name radio radio-id | ap-id ap-id radio radio-id | reason reason }

Parameters

Parameter	Description	Value
all	Displays all channel switching records.	-
calibrate	Displays channel switching records for radio calibration.	-
ap-name ap-name	Displays channel switching records of the AP with a specified name.	The AP name must exist.
radio radio-id	Displays channel switching records of a specified AP radio.	The radio ID must exist.
ap-id ap-id	Displays channel switching records of the AP with a specified ID.	The AP ID must exist.
reason reason	Displays records of channel switching caused by a specified reason.	The enumerated values are: calibration: channel switching caused by radio calibration configuration: channel switching caused by configuration dfs: channel switching performed to avoid radar channels mesh: channel switching caused by channel negotiation on a Mesh network unsupported: channel switching performed because the AP does not support the channel delivered from the AC wds: channel switching caused by channel negotiation on a WDS network 3gpp-bs-notification: channel switching notified by a 3GPP base station iot-notification: channel switching notified by an IoT card

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run this command to check channel switching records on a device.

Run the display channel switch-record calibrate command to query channel or power switching records caused by radio calibration to check the calibration results.

Example

# Display all channel switching records.

<HUAWEI> display channel switch-record all
Old/New: Old channel/New channel
RfID   : Radio ID
----------------------------------------------------------------------------------------------
AP ID  AP name  RfID      Old/New  Switch reason  Switch time
----------------------------------------------------------------------------------------------
1      L2-4f     0        1/6      wds            11:03:30 2014/9/28
----------------------------------------------------------------------------------------------
Total : 1, printed : 1

**Table 1** Description of the **display channel switch-record** **all** command output
Item	Description
AP ID	AP ID.
AP name	AP name.
RfID	Radio ID.
Old/New	Channels used before and after switching.
Switch reason	Reason for channel switching. calibration: channel switching caused by radio calibration configuration: channel switching caused by configuration dfs: channel switching performed to avoid radar channels dfs (In AC): channel switching caused by channel delivery by the AC to avoid radar channels dfs recover: channel switching caused by DFS channel switchback mesh: channel switching caused by channel negotiation on a Mesh network unsupported: channel switching performed because the AP does not support the channel delivered from the AC wds: channel switching caused by channel negotiation on a WDS network iot-notification: channel switching notified by an IoT card
Switch time	Time when channel switching occurred.

# Display channel calibration records.

<HUAWEI> display channel switch-record calibrate
PCH : Pre channel 
CCH : Current channel
PBW : Pre bandwidth
CBW : Current bandwidth
PE  : Pre EIRP (dBm)
CE  : Current EIRP (dBm)
PR  : Pre RSSI (dBm)
CR  : Current RSSI (dBm)
RfID: Radio ID
-----------------------------------------------------------------------------------------------------------------------
AP ID AP name   RfID  PCH/CCH  PBW/CBW  PE/CE   PR/CR    Reason         Time                 Trigger ID(Radio)
-----------------------------------------------------------------------------------------------------------------------
0     AP1       0     11/6     80M/40M+ 27/127  -32/-40  Period recheck 19:30:00 2016/04/11  -
0     AP2       0     6/11     20M/20M  27/127  -40/-48  Bad env        19:21:53 2016/04/11  3(0)
-----------------------------------------------------------------------------------------------------------------------
Total : 2

**Table 2** Description of the **display channel switch-record** **calibrate** command output
Item	Description
AP ID	AP ID.
AP name	AP name.
RfID	Radio ID.
PCH/CCH	Channels before and after calibration. NOTE: PCH/CCH changes may be discontinuous for a radio.
PBW/CBW	Bandwidth before and after calibration.
PE/CE	Power before and after calibration. NOTE: PE/CE changes may be discontinuous for a radio.
PR/CR	Interference values before and after calibration.
Reason	Reason for triggering calibration. Period recheck: periodic calibration Bad env: environment deterioration Non-Wi-Fi report: non-Wi-Fi report Rogue AP report: rogue AP report Noise interfere: noise interference Global plan: trial operation AP online: The AP radio is on, the radio is switched (between 2.4 GHz and 5 GHz bands), the radio working mode changes, or the AP goes online. AP offline: The AP radio is off, the radio is switched (between 2.4 GHz and 5 GHz bands), the radio working mode changes, or the AP goes offline. Bad Channel: The channel deteriorates, causing a loss of Beacon frames. iot-notification: An IoT card notifies calibration. High interfere: Severe interference occurs. Unknown: unknown reason
Time	Time when calibration is triggered.
Trigger ID(Radio)	ID of the AP (radio) that triggers partial radio calibration. NOTE: If global radio calibration is triggered, this field displays -.