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[aniruddha]

We are working with a chain of restaurants, the restaurant owner wants to create an experience where in once any of his guests logins into the wifi they provide & he/she (guest) shouldn't need to login again into any of the stores owned by the company. The guest should be able to just walk near the restaurant & the wifi should get connected automatically to there phones. Let me know how we can do this. What kind of an infrastructure will be required.  

[Freerk Terpstra]

You need an authentication system which can keep track of the known clients up to months or even years. Because the WLC is not capable to do so, you need to look for a external authentication system. A good example is Cisco's ISE which is RADIUS based. With only just the WLC the guest will be treated as "new" basically everyday and will be redirected to the portal to enter their credentials (again).

The automatic reconnection itself is something which the device is responsible for to do so. As long as the Wi-Fi deployment itself is good and the end-user keeps it's Wi-Fi turned on, this reconnection should happen. Because the device is being known by the authentication system it will have network access right away.

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