Hello Andre,
how many AP's do you plan to use? 100 C5210 controllers would support a maximum number of 100.000 APs - thats a really great number.
You can pair two controllers to one avaiblity pair (primary, secondary contr.) to support 2000 APs in failover mode. I think you need 50 different controller pairs in such a large setup. In the AP configuration you can add up to 3 controller ip addresses (controller search list). I'm not sure whats maximum number that can be managed by Netsight.
