ISE 1.4 to 2.1 Upgrade proccess

[Roger Base]

Hi Forum. I am about to upgrade my distributed ISE installation from version 1.4 to version 2.1. In this case I would hear about your experiences with it.

Since the GUI upgrade are not supported from version 1.4 to 2.1. I guess this should be done via CLI.

Which Node should I start with to minimize downtime? And will the upgraded nodes automatically register them self again in version 2.1?

ISE setup:

Node1: PriAdm/SecMon

Node2: SecAdm/PriMon

Node3: PSN1

Node4: PSN2

Node5: PSN3

Node6: PSN4

[Gagandeep Singh]

First do secondary admin then all PSNs' and finally primary admin.

Yes, the moment you'll do upgrade, they start forming new deployment.

http://www.cisco.com/c/en/us/td/docs/security/ise/2-1/upgrade_guide/b_ise_upgrade_guide_21/b_ise_upgrade_guide_21_chapter_00.html

Regards

Gagan

ps: rate if it helps!!!!