ISE Upgrade from 2.6 to 3.0: Apply latest patch to 2.6 first?

[mattw]

Hi all,

I need to upgrade an ISE deployment from 2.6 patch 3 to ISE 3.0 patch 3.

I seem to remember either reading or being told by a TAC engineer that it is best practice to upgrade to the latest patch in the current major release, before upgrading to the target major release but I can't find this written down anywhere.

Therefore I should apply patch 10 to the ISE 2.6 deployment before starting the main upgrade to ISE 3.0.

Is this common knowledge? Does anybody else do this? Have I dreamed it and made it up?

Thanks!

[Mike.Cifelli · Accepted solution]

Is this common knowledge? 

IMO, yes, and I totally agree with TAC.  100% of the time on bundle upgrades I always install latest patch for version I am on and always suggest doing this.  Doing so will make your bundle upgrade time shorter in the long run.  HTH!

[mattw]

Thanks @Mike.Cifelli.