To upgrade the machines you just need to push upgrade button, right?
Is there any dependency of SP infrastructure?
Is it recommended to upgrade firmware from 2.2.30 to last version (2.2.47)?
Yeah, where are the precise instructions to perform the upgrade? I don't want to start this and end up with a brick. Especially since it is now running fine.
In the management console, under firmware upgrade, there is a button that you can click to upgrade your firmware. clicking the button will upgrade to the latest version available.