Hi,
and welcome to the forums.
Apparently you' re very new to the forums and haven' t read a lot about current firmware versions. So I will help you: stay away from 4.3 for now! There have been a number of serious bugs and inconsistencies reported which have not been fixed yet; employing this release is asking for trouble. Just do a quick search on " 4.3" or " MR 3" .
The update process is easy: using the Web GUI, start the upgrade. The cluster itself will organize it in such a way that the least possible downtime will occur.
Specifically,
- the passive slave will be upgraded first and reboot
- the cluster will fail over to the upgraded slave
- the passive slave (ex master) will be upgraded and reboot
- depending on your settings, one last failover will happen (or not)
So actually, you will sit and watch all the time. Please read the Release Notes carefully and follow the recommended path through the intermediate releases.
It can' t be bad to check if the config has been converted flawlessly in between upgrades:
diag debug config-error-log read
Ede Kernel panic: Aiee, killing interrupt handler!