Limited information - AP name, Static IP address if configured, Primary, Secondary & Tertiary WLC controllers - if they have been primed. No WLAN,VLAN or encryption key information is kept on the Ap's.
The reason I ask is that we stage APs for the field and the question was asked, if you do all the configuration for the LWAP on the controller then what happens when you take the LWAP off the staging controller(configured exactly as the production controller in the field) and place it in the field on the production controller? Does the information such as LWAP nanme and other settings stay with the LWAP or do you have to reenter all this information into the production controller?
With all this being said, it appears that you still need to do some configuring once the LWAP has been plugged in on site.
It depends how you stage the AP's. Usually I will stage them on the production ap just to verify that the ap has joined and that the ap has all the configurations required. If you stage the ap on a test WLC and then put it into a production envoronment, you will most likely have to stage the ap again. By this, I mean, you have to have the ap jion the primary WLC so that the ap gets the mobility info from the primary which includes the secondary and tertiary wlc info. The ap name, ip address (static/dhcp) ,any info you configured under the ap will stay.