S5720-56C-HI-AC AP switch to Low frequency channel after set the calibrate 5G channel to high frequency channel

S5720-56C-HI-AC AP switch to Low frequency channel after set the calibrate 5G channel to high frequency channel

Some of the APs are still showing 5GHz on channel 36 (20MHz) after set the calibrate 5G channel to high frequency channel.

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regulatory-domain-profile name default

  dca-channel 5g channel-set 100,104,108,112,116,120,124,128,149,153,157,161

  dca-channel 5g bandwidth 40mhz

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1. Checking the regulatory-domain-profile, all of the channel is high frequency channle. And calibrate enable on the device. 

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regulatory-domain-profile name default

  dca-channel 5g channel-set 100,104,108,112,116,120,124,128,149,153,157,161

  dca-channel 5g bandwidth 40mhz

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2. Checking the channel switch of the AP, it shows that the switch reason is dfs, it means that the AP detect radar and after that the channel switch. It is normal that the AP switch channel when it detect radar signal. Current software version of the switch is S5720 V200R010C00SPC600 and it doesn't support radar channel choose and channel switch back, so after channel change to low channel, before next calibration, the AP will keep on low channel. 

3. Recommend upgrade software of the switch to V200R011C10SPC600 and install patch V200R011SPH005. After upgrade,enable calibration bandwidth function, it is enable by default. With this way, after the AP detect radar signal, it will switch to other random channel, if the channel is low channel, the AC will enable calibrate bandwidth and change to high frequency channel. 

<HUAWEI> system-view

[HUAWEI] wlan 

[HUAWEI-wlan-view] regulatory-domain-profile name huawei

[HUAWEI-wlan-regulate-domain-huawei] dca-channel 5g bandwidth 40mh

Recommend upgrade software of the switch to V200R011C10SPC600 and install patch V200R011SPH005. After upgrade,enable calibration bandwidth function, it is enable by default. With this way, after the AP detect radar signal, it will switch to other random channel, if the channel is low channel, the AC will enable calibrate bandwidth and change to high frequency channel. 

<HUAWEI> system-view

[HUAWEI] wlan 

[HUAWEI-wlan-view] regulatory-domain-profile name huawei

[HUAWEI-wlan-regulate-domain-huawei] dca-channel 5g bandwidth 40mhz