Cisco ISE 2.4 to 3.0 Upgrade Procedure
If you have ever read through Cisco ISE 3.0 Upgrade Guide you know that it involves a lot of decision points and having to reference many other Cisco reference documents just to build a complete implementation plan for upgrading Cisco ISE from 2.x to 3.x. It is a complicated process if you have never been through it before, and often times you're left with more questions than answers when researching how to proceed. This usually involves engaging Cisco TAC to help clarify points that aren't necessarily obvious in their documentation. Having gone through this upgrade path this past year, I thought that documenting the procedures that I followed may help others gain success in their own upgrades. Understand that all implementations are different, so use this as another piece of information as you research how to perform this upgrade.