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Upgrade CUCM 8.5 (RH 4 OS) to CUCM 8.6 (RH 5 OS)


Hi all,

When installing a CUCM making use of hte OVA template, this uses RedHat 4 etc.

When upgrading towards CUCM 8.6, this effectively uses Refresh Upgrade to RedHat 5.

Should we updat the OVA template? Is there an impact?


1 Comment
Cisco Employee

there is a specific step in release notes for this situation.  Here is the information found at

Upgrading to Unified CM 8.6(1) on a Virtual Server


If you run Cisco Unified Communications Manager on a virtual server, and are upgrading to the 8.6.1 release, you must make sure that the virtual server's Guest Operating System and RAM meet the requirements for the latest release.


To upgrade Cisco Unified Communications Manager on a virtual server, do the following:


Step 1 Upgrade the virtual machine to the latest release. For information on installing or upgrading Cisco Unified Communications Manager on virtual servers, refer to the document Cisco Unified Communications Manager on Virtualized Servers.


Step 2 After you finish the upgrade, shut down the virtual machine.


Step 3 Change the Guest Operating System to Red-Hat Enterprise Linux 5 (32-bit).


Step 4 Check the RAM on the virtual machine and make sure that it meets the minimum RAM requirements for this release. Refer to the readme file that accompanied this release's OVA file for minimum RAM requirements at: Products\Voice and Unified Communications\IP Telephony\Call Control\Cisco Unified Communications Manager (CallManager)\Cisco Unified Communications Manager Version 8.6\Unified Communications Manager Virtual Machine Templates.


Step 5 Save changes.


Step 6 Restart the virtual machine.


Dan Keller

Technical Marketing Engineer

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