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I have a customer with a 6509 with a SUP 720 and planning to deploy a WLAN,I would like to have a WISM(with LWAPP) in the 65k as compared to the WLC.
What exactly you will like to know?
Choice between WISM and WLC depends upon the number of AP you want in your network and how scalable your future network and requirement is.
WLC 4404 can support max of 100 APs on each as compared to WISM which can support 300 APs on each wism.