Upgrading Redhat with no internet connection
I am trying to run an upgrade to my redhat, the problem is that I don't have an internet connection and after the upgrade finishes the machine does not work.
I got an answer from support that this kind of upgrade is not supported (with no internet).
Is it true ?
If not (and I beleive its not), what do I have to do in order to upgrade correctly.
I must say, that when I do a full installation, everything works fine, the problem happen only when I upgrade my current version.