[cisco-voip] Upgrade Analysis for CUCM 8.5(1) to 8.6(2a), 9.0(1), or 9.1(1a)

[Erick B.]

I've done a upgrade from 8.5.1 to 9.1.1a with no issues. Licensing is
different as you know, but basically installed the refresh_upgrade cop file
then did the 9.1.1 upgrade file and booted on new version and went fine.
VM's are on UCS B as well. Separate ELM server.  Upgrade from 8.5.1 to
9.1.1 did not take much longer than a normal 8.5 SU took. For our setup,
that is about 1.5 hr to 2 hrs for publisher install and 1 hour for each
subscriber. The switch version for each server took 20-30 minutes to
complete per server.




On Wed, Apr 24, 2013 at 2:08 PM, Dave Wolgast <dwolgas1 at rochester.rr.com>wrote:

> Has anyone done any analysis like this that they would be willing to
> share? We are trying to determine upgrade complexity among these 3 options,
> considering licensing, any upgrade caveats, and potential user-facing
> changes. We'll be performing the potential upgrade on UCS-B platforms, and
> essentially, we need to choose one of these options to maintain UCCE
> compatibility, while keeping disruption to a minimum.
>
> --
> Dave Wolgast
> Livonia, NY
>
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>
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