I just completed a major upgrade from CCM 4.x to 5.x and IPCC 4.x to 5.x. This was one heck of an upgrade process! There were a few issues with IPCC, specifically enterprise data pop for the agents didn't work, recorded calls were not purged after 7 days and some other items. CallManager had a few unpublished steps that had to take place to allow the new IPCC box. All this to say, the upgrade had some, "hitches."
I would like to upgrade from CCM 5.1 to 6.0(1a) and would like to know if there are ANY known issues maybe published or not or any advise from someone who has done the same.
1. We have IPCC 5.01 sr2
2. Unity 4.x (with latest DST)
3. We use extension mobility heavily with our support center and IPCC.
Are there any issues with integrating the other systems, changes that need to be made, licensing etc...???
Thank you in advance for your response...
I just wanted to add this note to the good info from Mike. I'm not sure what 5.x release you upgraded to but be careful with the Caveat for 5.1(3);
This restriction does not apply to CCM 5.1.2 (as it does to CCM 5.1.3) :)
Release Notes for Cisco Unified CallManager Release 5.1(2b)
Here is the CCM 5.1.3 note;
Do Not Upgrade from Cisco Unified CallManager 5.1(3) to Cisco Unified Communications Manager 6.x
It is not possible to successfully upgrade from Cisco Unified CallManager Release 5.1(3) to Cisco Unified Communications Manager Release 6.x.
Release Notes for Cisco Unified CallManager Release 5.1(3)
Hope this helps!