Automatic frequency-band selection

As of LCOS9.00 you have the option to allow a managed AP to choose the preferred frequency band for the physical WLAN interface by itself.  In LANconfig the configuration is carried out in the dialog WLAN Controller > AP configuration > Access point table:

Mode WLAN ifc. 1
This setting allows you to configure the frequency band in which the AP operates the 1st physical WLAN interface. When set to Default, the AP independently selects the frequency band for the physical WLAN interface. The AP prefers the 2.4GHz band, if available.
Mode WLAN ifc. 2
This setting allows you to configure the frequency band in which the AP operates the 2nd physical WLAN interface. When set to Default, the AP independently selects the frequency band for the physical WLAN interface. The AP prefers the 5GHz band, if available.
Note: If a managed AP only has one physical WLAN interface, the AP ignores the settings for the 2nd physical WLAN interface.