dca-channel channel-set
Function
The dca-channel channel-set command configures a calibration channel set.
The undo dca-channel channel-set command restores the default calibration channel set.
By default, a calibration channel set contains channels 1, 6, and 11 on the 2.4 GHz radio and contains all channels supported by the corresponding country code on the 5 GHz radio. If the country code is CN, the default calibration channel set does not contain channels 36 to 64. When configuring a calibration channel set, you can specify channels as prompted.
Format
dca-channel { 2.4g | 5g } channel-set channel-value
undo dca-channel { 2.4g | 5g } channel-set
Parameters
| Parameter | Description | Value |
|---|---|---|
2.4g | 5g |
Specifies the frequency band on which radio calibration is performed. The options are as follows:
|
- |
channel-set channel-value |
Specifies a calibration channel set. |
The value is a character string. You can select calibration channels as prompted. If you select multiple channels, use commas (,) to separate channel names. |
Usage Guidelines
The 5 GHz frequency band has richer spectrum resources. In addition to 20 MHz channels, APs working on the 5 GHz frequency band support 40 MHz and 80 MHz channels. Larger-bandwidth channels mean higher transmission rates. However, at least three channels are required in radio calibration to achieve the optimal calibration effect. When configuring the calibration bandwidth, ensure that enough calibration channels are available for use.
You can run this command to specify a calibration channel set for an AP. The AP selects channels from the channel set to calibrate. This reduces the burden on the AP.
To ensure a good calibration effect, you are advised to configure at least three calibration channels.
To prevent signal interference, ensure that adjacent APs work in non-overlapping channels. The 2.4 GHz frequency band has overlapping channels. When configuring calibration channels, you are advised to configure a non-overlapping calibration channel set containing channels 1, 6, and 11 or containing channels 1, 5, 9, and 13.
To specify a 40 MHz calibration channel, you need to specify two consecutive 20 MHz channels. To specify an 80 MHz calibration channel, you need to specify four consecutive 20 MHz channels. The combinations of 20 MHz channels making up the 40 MHz and 80 MHz channels are fixed.
You can also use the dca-channel bandwidth command to configure the calibration bandwidth and the dca-channel channel-set command to configure calibration channels as prompted.
If no calibration channel set is configured, the device probes channels based on the calibration channels corresponding to the country code.
When configuring a calibration channel set, avoid using radar channels.
The channels you configure must be supported by the terminals; otherwise, the terminals cannot discover wireless signals.
Channels 184, 188, 192, and 196 on the 4.9 GHz frequency band can be used for radio scanning but cannot be used for channel calibration.
If the AP has three 5 GHz radios, configure at least five calibration channels. If the AP has two 5 GHz radios, configure at least three calibration channels.
Example
# Configure a calibration channel set composed of 40 MHz channels 149, 153, 157, and 161 on the 5 GHz frequency band.
<HUAWEI> system-view [HUAWEI] wlan [HUAWEI-wlan-view] regulatory-domain-profile name huawei [HUAWEI-wlan-regulate-domain-huawei] dca-channel 5g bandwidth 40mhz [HUAWEI-wlan-regulate-domain-huawei] dca-channel 5g channel-set 149,153,157,161