Hi we have PAN SAN and several service nodes of ISE, which all need to upgrade from 2.4 to high level. Reviewing cisco protocol to upgrade these ios, it seems more steps for the upgrading. So we think if we can do it like this: since all nodes are VM, can we create new nodes and transfer all license, certificates and config to the new nodes? After testing all nodes are good, then shutdown old nodes. Is this practical? Thank you