Please go through the below link :https://supportforums.cisco.com/blog/153181/high-availability-ap-sso-configuration-examples-using-cli-gui-and-pair-wireless-lan
Apply power to the access point:a. The access point is 802.3af (15.4 W) compliant and can be powered by any 802.3af-compliant device.Note The access point is downgraded to 3x3 when it is connected to a 15.4W supply. For the access point to operate at...