CUCM 12.5 image for upgrading from 11.0

[Jahangir Tahirov]

We are planning an upgrade from CUCM 11.0 to 12.5 via the OS admin page, do we need a bootable 12.5 or just 12.5 images from software.cisco.com?

[Jaime Valencia]

You should use MCE for that, this is from software.cisco.com

Version Upgrade using MCE New
Order major upgrades to software such as Unified Communications

[Nithin Eluvathingal]

You don't need a bootable image for upgrading through OS admin page, but as @Jaime Valencia  mentioned make a new upgrade order through MCE. 

AFIAK if you don't do it through MCE, the Cisco backed customer information will be on version 11 and it will effect us when renewing SWSS. I faced issues  renewing  the SWSSS with customer who didn't upgrade it through MCE/PUT.So open a upgrade request through MCE.

[Jahangir Tahirov]

Trying to install COP file for checking system for ready Upgrade, but it shows:  A valid upgrade file must be provided before an upgrade can be started.

tested Cop files but failed:

ciscocm.free_common_space_v1.5.cop.sgn

ciscocm.refresh_upgrade_v1.5.cop.sgn

[Nithin Eluvathingal]

Upgrade readiness file is not the one which you mentioned.its ciscocm.preUpgradeCheck-00024.cop.sgn

Check your SFTP and make sure the CUCM can access the file from SFTP.

[Jahangir Tahirov]

The cop file named ciscocm.preUpgradeCheck-00024.cop.sgn is in Sftp & CUCM read that file from SFTP storage. But after selecting this cop & above cops which I mentioned CUCM shows error:   "A valid upgrade file must be provided before an upgrade can be started."