Sorry to bring up this thread from the past, but I'm in the middle of an Aruba deployment, and the ArubaOS manual isn't really clear on that topic, at least not for me.
We have two Aruba 7030 controllers (only one configured right now), and some 50 APs, and I'm not sure which route to go for redundancy.
Master Redundancy / HA Groups / Local Redundancy? All of them?
EDIT: Never mind, I should open a new thread.