Victor,
Do you know many devices were connected to that cluster?
I see now it mentions in the User Guide
As of Instant 4.1 relelase, Aruba recommends that networks with more than 128 APs should be designed as
multiple, smaller virtual-controller networks with Layer-3 mobility enabled between them.
I can't seem to find any sort of scalability guide in terms of number of clients, auths per sec and such like for the different AP models.
I am looking to deploy a cluster of 95, but thinking maybe I need to break that into separate ones.