The company I am working for provides wireless hotspots at hotels, airports etc. They are using one separate wireless controller at each site but all the APs on each site are standalone APs (autonomous). So controller is not being used to manage APs but only for directing all traffice to radius server for landing page functionality and keeps AAA parameters returned from radius server for accounting and session handling.
So instead of using separate controller at each site, is there any server option available which will provide this funtionality (i.e. directing traffic to radius server and keeping AAA parameters). This server would be centerlised and all remote sites can access it through VPN.
NB: my company don't want to use big centeralised wireless controller due to the cost involved. so I think there no need for controller if some server can provide this basic funtionality, we are using controller for at the moment and it will save my company cost per site.
Thanks in advance