Wireless AP FlexConnect mode switchport mode
When configuring a wireless access point to function in FlexConnect mode, it can be connected to a switch using either an access port or a trunk port. In the case of a trunk port, the access point needs the management IP address on the Native VLAN to function.
Links
https://networklessons.com/wireless/cisco-wireless-ap-modes
https://forum.networklessons.com/t/cisco-wireless-ap-modes/8999/18?u=lagapides