Hello,
It will depend on the WLAN configuration.
If the WLAN is a standard PSK network or is WPA2-Enterprise using the AP for RADIUS proxy, then the network will be unaffected.
If you are utilising tunnelling to the controller - of course this will be affected.
If you have a Captive Portal WLAN, this will not function during a controller outage.
If you are using DPSK this will also be affected by a controller outage.
This is why SmartZone has clustering functionality, to provide resilience and redundancy in case of failure of the controller or the network element that connects it.
