How TO - CUCM Upgrade from 8.0.3 to 8.5.1 ( Local Disk Install )

Upgrading CUCM from 8.0.3 to 8.5.1 

 1. Login to the CUCM OS Administration Page
 2. Select Software Upgrades (from menu)
 3. Select Install / Upgrade 

4. I'm installing from local disk so I select DVD/CD. ( Make sure the disk is actually in the CD Drive )
5. Click Next
6. The CUCM system should acknowledge the CD in the drive and point you to the 8.5.1 ISO. ( The ISO for upgrades can be downloaded through your Cisco CCO Account).
7. Click Next


8. The page will display letting you know a backup is recommended and verify the MD5 Hash for integrity of the install.  Make sure you have a backup of your system or a snapshot that you can quickly revert back to. 
9. Make sure " Do not reboot after upgrade" is selected 
10. Click Next
11. The system should now be trying to run the install package for your system.
12. The status will become complete once finishing the install. The new update is now applied to the inactive partition of CUCM. 

13. Click the Settings Menu
14. Click Version 
15. Click "Switch Versions"
16. The message box dialog should come up -- Click OK
17. Now your screen should look like the following as CUCM is trying to switch the version.
18. The upgrade is going and will be initiated. The server will reboot and switch the "inactive partition" to be the "active partition". Essentially this means you're upgrading from the installed version earlier.
19. After the reboot of the server reload the web page and you should have an upgraded version to 8.5.1 ( as long as nothing went wrong)

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