FortiOS upgrade from 7.2.11 to 7.4.9

Question

There are already some upgrade issues realted with version 7.4.9.

Upgrade reason is, that fortigate cluster doesnt operate at all after every 14-20 days and only way to get it back, is to make power interruption.

I have heard, that if to upgrade from 7.2.11 to 7.4.9, fortigate can be stuck after upgrade. Somewhere was comment from Fortinet, that they investigate that problem.

I upgraded a model 60E and it was succesful. It makes me more confident, but only little, because model 600F is different and that is I'd like to upgrade next. Best case, there is no downtime at all and dual SFP tranceivers also are compatible. Worst case, that I have to manage via console and boot from older version and configuration and then I have old version back. Does anyone have expreiences, what models are related with this problem or is it just FortiOS case and not hardware related problem?

Toshi_Esumi · Answer

We were forced to upgrade our 1000D a-p HA pair from 7.2.12 to 7.4.9 last night since FTNT wouldn't implement some medium vulnerability fixes to 7.2.x any more. Since this particular cluster is not much doing UTM/UTP stuff other than VPNs also 7.2.12->7.4.9 was one-step upgrade, the upgrade was very "quiet" and there was no config errors during the config conversion. Nothing was alarming including CPU/memory usages.
We'll do the same for another 1000F a-p HA pair this week, then continue for the rest of our fleet because we're forced.
Of course, I've been running 7.4.9 on my 40F for last 2+ months without any particular problems.

Toshi

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