In Plain English, With Smart licensing, Cisco sync your license status/inventory to cloud rather than PAK based/ tied to your device offline mode ( so no pain when you change general setting and license mac changes). CUCM 12.5.x), for some its still optional ( UCCX 12.5.x). Check Cisco live BRKUCC-2725 for more details.įor some servers/devices only Smart licensing is the option after specific version ( e.g.

Migrate your ELM/PLM licensing to Smart licensing.Check the list of Deprecated Phone models listed in document, if you have any, take care of that in advance ( upgrade, replacement.Check compatibility of other applications relying on CUCM/CUC/UCCX with target version ( SBC, Voice GW, 3rd party apps.).Check if any OVA template changes required ( RAM, CPU increase changes recommended or required).Check your esxi version compatibility with target version.Check your Platform / server hardware compatibility with target version.Check release notes for open bug / open security vulnerabilities. Rather than explain in detail, I let you contact Cisco TAC with bug ID and then will help you with actions, based on your scenario/specific issue. In version 12.X we expect to have itl and ctl signed by ITLRecovery cert, if you don’t see it then it also needs to be fixed. Contact Cisco TAC as they need to fix the permission issue using the root account. Run this command and if you see the error on the last line, then you are facing the bug.

Note – On CUCM12.5 SU2, we are facing the bug CSCth35648 ( and a few others), causing ITL issues. Keep Official upgrade guide handy for exhaustive list: Just logon with your cco account or signup. Cisco live on demand library is very useful, informative and free. Look for BRKUCC-2011 on Cisco live library, there are 2 prez/sessions contain all screenshots/details. In short, I am not responsible for any disaster 🙂 You may even hit different issues which I didnt come across.You may not have identical environment.I performed the upgrade few months ago so I might have forgot few things.Please dont consider this as step by step guide and be open to possibility that I may have missed few points: I will list existing resources available on the Internet and add few things from my experience.īefore making any changes, please consult with Cisco TAC or do your own research /testing in lab environment. This checklist gives you quick overview of all the steps you need to do for CUCM upgrade 11.5.x to 12.5.x.

Cisco uccx 11.5 downloads