Right when the Wi-Fi access and security management are moving towards the controller-less architecture, another interesting architecture seems to have evolved at the other extreme. This architecture seems to be advocating not one, but two WLAN controllers in tandem – and that too from two different vendors. And, some optional (additional?) security management servers on top of the tandem. You think I am kidding? Then check this announcement from Aruba Networks, which is a leading controller-based WLAN vendor: http://www.arubanetworks.com/solutions/by-application/byod-services-on-your-existing-wi-fi/. The stated business case seems to be to put a band-aid on the Cisco WLAN’s (another leading controller-based WLAN vendor) insufficient security features.
In this case, the tandem is only for BYOD security, but as a matter of fact there are many more security gaps that will still remain to be addressed even after the twin tandem controllers are deployed. Would we need a third WLAN controller in the tandem to fill the remaining security gap, and who might provide that? Or, is it just easier to deploy a controller-less comprehensive WIPS solution (and that too with the onsite or cloud option) and secure the Cisco WLAN once and for all. Just a practical thought.