https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/215681-configure-oeap-and-rlan-on-catalyst-9800.html

https://mrncciew.com/2013/01/12/office-extend-overview/ https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-3/b_Cisco_OfficeExtend_Access_Point_/b_Cisco_OfficeExtend_Access_Point__chapter_01.html

It is always recommend to use a wireless management VLAN and configure WMI as a Switched VLAN Interface (SVI). If the uplink port or port-channel to the next-hop switch is configured as a dot1q trunk, the wireless management VLAN would be one of the ...

What he ^ said. You can be more specific in your search. For example I typed "site: cisco.com 4500-2 user guide" on google and the first option should be what you are looking for https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/50...