Information About Converting Autonomous Access Points to Lightweight Mode
You can convert any autonomous mode Cisco Aironet access point, to lightweight mode. When you upgrade one of these access points to lightweight mode, the access point communicates with a controller and receives a configuration and software image from the controller.
See the Upgrading Autonomous Cisco Aironet Access Points to Lightweight Mode document for instructions to upgrade an autonomous access point to lightweight mode:
All Cisco lightweight access points support 16 BSSIDs per radio and a total of 16 wireless LANs per access point. When a converted access point associates with a controller, wireless LANs with IDs 1 through 16 are pushed to the access point if the AP is part of the default AP group on the controller. You can use other AP group configurations to push other wireless LANs to the new AP.
When a 802.11ac module (the RM3000AC) is added to a 3600 AP, you can have only 8 wireless LANs on the 802.11a/n/ac radio.
Access points converted to lightweight mode must get an IP address and discover the controller using DHCP, DNS, or IP subnet broadcast.