I'm not able to find the OCUM 7.3 upgrade package, on the software portal it says it's pending to be released. Right now only the OVA is available. Do you have an estimated release date? We upgraded from 7.0 to 7.1 using the ISO but are now stuck to go to 7.3
We won't migrate any performance data so we won't need to go through 7.2.
I didn't create a proper upgrade plan, I just took a VM snapshot before starting, but the process is very straight-forward. You just login at OS level in the system and from the menu you choose to upgrade, it will guide you through the process, it actually askes you to shutdown the system and take the snapshot to be safe. Then you need to load the ISO file in the virtual drive and proceed, after some time you reboot and all is done