Multiple Site Support
 
 
  
   Seamless inter-AP roaming is supported only between the APs in a site. For this reason, you
    should create your site so that the devices correspond to a physical location. For example, you
    can create a site consisting of all the devices on a floor or in a building.

Note   
For
     information about the number of sites supported, see 
System Limits.
 
 
   Different sites can have the same configuration or have distinct
    configurations. However, transparent roaming is only available between APs in a site, and not
    across multiple sites.
   The authentication infrastructure (RADIUS server) can be either local to
    the site or reachable by the network.
   Multiple site deployment for a school board managing several
     independent schools