I have a client with a two controller, master-local controller configuration. They have mesh APs using the Local as primary LMS, and the Master as a backup LMS. For non-mesh Aruba controller OS upgrades I normally simply push the code, and reload all controllers simultaneously. For this environment is there a better way? The client will be upgrading from 6.1.x to 6.3.x. The Mesh APs are all 175s.