I have a virtual smartzone-high scale controller running on version 184.108.40.206.302. The APs associated to the controller are mainly R320. I am planning to upgrade the controller, would you kindly inform me about the latest release that would be possible to upgrade to in my case ? besides, what are the steps required to perform the upgrade from GUI ? and will there be any downtime regarding the APs service ?
Thanks for your valuable responses in advance !