I am looking for a wireless LAN controller tha can do the following:
1) Need to able to work with existing cisco AP AIR-AP1242AG-E-K9 (x 4) , AIR-AP1242AG-S-K9 (x 3) , AIR-AP1242AG-C-K9 (x 1) and in future to be added Aironet 1250 ( 802.11n) devices which are spread across various offices both local and oversea and connected via a Wide Area Network
2) A single Wireless LAN controller will be in head office to intercept guest authentication traffic but internet traffic will either go via the branch office internet gateway or head office internet gateway. Staff access authentication traffic is via MS ISA radius sever working in conjuction with AD, PEAP and Certificate service(already set this up and is it working in a test environment).
3)Guest access is control by issuing a time expiration login credentials from the WLAN controller. A web https login page will be presented to guest for authentication upon launching the web browser (similar to some hotel hot spot concept) .This mean that a single SSID is broadcast which depending on whether the client is a staff or a guest, the setup must be able to response appropriately to authenticate these 2 group of users.
4)In head office, I am using a L3 4948 switch as a core switch connnecting a few L2 2960 edge switches without having any VLAN to segregate my subnet.I am turning on some of the port to a router interface.
In the branch office only L2 switches and one single subnet. Wireless network and wired network are shared in the same network for each subnet.
Based on these requirements, I think Cisco 4404 or Cisco 4402 WLAN controller can do the job. The question is do I need to have L2 VLAN in my environment to work to fufill the above requirement as I read from the cisco config example that there is some VLAN to be set in the initial config of WLAN controller.