Cisco Cisco Aironet 3700p Access Point Guía De Instalación

Locally stored controller IP address discovery—If the access point was previously joined to a 
controller, the IP addresses of the primary, secondary, and tertiary controllers are stored in the 
access point’s non-volatile memory. This process of storing controller IP addresses on an access 
point for later deployment is called priming the access point. For more information about priming, 
see the 

DHCP server discovery—This feature uses DHCP option 43 to provide controller IP addresses to 
the access points. Cisco switches support a DHCP server option that is typically used for this 
capability. For more information about DHCP option 43, see the 

DNS discovery—The access point can discover controllers through your domain name server 
(DNS). For the access point to do so, you must configure your DNS to return controller IP 
addresses in response to CISCO-CAPWAP-CONTROLLER.localdomain, where localdomain is 
the access point domain name. Configuring the CISCO-CAPWAP-CONTROLLER provides 
backwards compatibility in an existing customer deployment. When an access point receives an IP 
address and DNS information from a DHCP server, it contacts the DNS to resolve 
CISCO-CAPWAP-CONTROLLER.localdomain. When the DNS sends a list of controller IP 
addresses, the access point sends discovery requests to the controllers.

Before you mount and deploy your access point, we recommend that you perform a site survey (or use 
the site planning tool) to determine the best location to install your access point.

You should have the following information about your wireless network available:

Access point locations.

Access point mounting options: below a suspended ceiling, on a flat horizontal surface, or on a 
desktop.

You can mount the access point above a suspended ceiling but you must purchase 
additional mounting hardware: See 

 for 

additional information.

Access point power options: power supplied by the recommended external power supply (Cisco 
AIR-PWR-B), a DC power supply, PoE from a network device, or a PoE power injector/hub 
(usually located in a wiring closet).

Access points mounted in a building’s environmental airspace must be powered using PoE 
to comply with safety regulations.