- Which version would you recommend? Should I ask why? - Were there any published guides/videos that you found particularly useful to follow for your upgrade - Any "gotchas" you ran into and you thought - Man, how come they didn't mention this ****? - Did you develop any inhouse upgrade guide that you would be willing to share? - Of course, any other thoughts/comments/banter are welcomed 1. I'd go with 9.1 as it is practically the same code train as 9.0 (they only added sdwan and some minor features) and it's already pretty mature, plus it's EoL date is still far away (9.0 ends next year) 2. this is a solid article https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClRrCAK 3. lock-step the upgrade, don't go all the way on one member only unless you're ok to have downtime, make sure the content packages are up-to-date. Go for the latest maintenance release in 9.0, even though you're headed for 9.1. nothing sucks more than getting stuck on an early 9.0 bug while upgrading to 9.1 . Make backups and download them off the box 4. yep, look at my signature 😉 5. see 3.
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