When prompted, choose Result. Upgrade type Switching type Usethisoptiononlyif youareperforminga refreshupgradeinstages. Whenyouchoosethis optionthesystemreboots. Solved: CUCM 11.5 installation Questions. Community.cisco.com DA: 19 PA: 50 MOZ Rank: 70. I used the CUCM 11.5 ova to build the VM for it; I need the 11.5 iso file to mount so it will install on startup; At first, I was under the impression I needed to use the Cisco PUT in order to receive a link to download everything I need for the.

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This checklist gives you quick overview of all the steps you need to do for CUCM upgrade 11.5.x to 12.5.x. I will list existing resources available on the Internet and add few things from my experience.
Before making any changes, please consult with Cisco TAC or do your own research /testing in lab environment.

Please dont consider this as step by step guide and be open to possibility that I may have missed few points:

I performed the upgrade few months ago so I might have forgot few things. I am human 🙂
You may not have identical environment.
You may even hit different issues which I didnt come across.

In short, I am not responsible for any disaster 🙂

Look for BRKUCC-2011 on Cisco live library, there are 2 prez/sessions contain all screenshots/details. Cisco live on demand library is very useful, informative and free. Just logon with your cco account or signup.

Keep Official upgrade guide handy for exhaustive list:

Note – On CUCM12.5 SU2, we are facing the bug CSCth35648 ( and a few others), causing ITL issues.
Run this command and if you see the error on the last line, then you are facing the bug. Contact Cisco TAC as they need to fix the permission issue using the root account. Also a few other things maybe.
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.
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.
admin: show itl
“Failed or interrupted I/O operations.
Error parsing the ITL File.”

Pre-req

Figure out your target version. Know your WHY. Check release notes for open bug / open security vulnerabilities.
Check your Platform / server hardware compatibility with target version.
https://www.cisco.com/c/en/us/support/unified-communications/unified-communications-manager-version-12-5/model.html#CompatibilityInformation
Check your esxi version compatibility with target version. ( check BRKUCC-2011 prez).
Check if any OVA template changes required ( RAM, CPU increase changes recommended or required).
https://www.cisco.com/web/software/283088407/145119/cucm.ova.README.pdf
https://docwiki.cisco.com/docwiki-eol.html#VMware_vSphere_ESXi_Version_Support_for_Call_Processing_and_System_Management_Applications
Check compatibility of other applications relying on CUCM/CUC/UCCX with target version ( SBC, Voice GW, 3rd party apps..).
Check the list of Deprecated Phone models listed in document, if you have any, take care of that in advance ( upgrade, replacement ..).
Migrate your ELM/PLM licensing to Smart licensing. Check Cisco live BRKUCC-2725 for more details.
If you decide, Deploy CSSM in advance.

For some servers/devices only Smart licensing is the option after specific version ( e.g. CUCM 12.5.x) , for some its still optional ( UCCX 12.5.x).
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). You need to decide whether you want to sync your Infra devices to Cisco licensing portal directly ( device having internet access), via http proxy or you can deploy CSSM on prem ( lightweight VM) which can sync license from Cisco and with your infra ( Man in the middle 🙂 ).

Smart licensing goes beyond UC servers You can deploy 1 CSSM and use for entire Org. You will need to organize and clarify the Smart Account Structure in advance. Check Cisco live BRKUCC-2725 for more details.

Example – Top – Smart account = ABC.com
Sub level:
Virtual account = AP Collab
Virtual account = EU Collab

CSSM is simply a router/proxy which talks to internal devices with identifier and sync available licenses for your Smart accounts.

If you decide to use CSSM with Smart licensing, I suggest create a Smart account with Cisco and deploy/configure CCSM in advance then focus on license migration.

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BRKUCC-2725 has all details on how to do license migration. If you get the error while doing the migration, open a case with licensing ( few times I got an error and licensing team helped doing from back end), they will deposit the licenses to your smart account. Probably you will need to provide, Smart account name, Smart account domain name, Virtual account name.

Plan your upgrade

Plan your change window, open a change etc etc.
Keep note that with RU upgrade, Server is down while upgrade is taking place on inactive partition. RU = refresh upgrade = Underlying Linux version is changing. Plan your downtime window accordingly.
Decide your upgrade method – Direct or PCD. PCD = Prime Collaboration Deployment, VM you can deploy to orchestrate the migration/upgrades for you.
Download the Software images and keep on sftp server. Notice the difference in between Restricted VS Unrestricted version, use the correct image.
https://software.cisco.com/download/home/286322286/type/286319236/release/12.5(1)SU3
Keep a OVA file/ bootable image of your existing version on sftp just in case you will need to rebuild the server. If you have Enterprise Agreement with Cisco, you can download by yourself or else, open a Cisco TAC and ask for images.
Bootable images arent available/same under download page.
From 12.x CUCM and Unity connection ISO are separate.
Either verify that you have rights to deploy new VM or keep your team ready who can create a new VM in change window, if you have to rebuild a server ( worst case scenario).
If your server has a uptime of more than 365 days, Its nice to plan and give it a reboot in advance to your upgrade.
Verify you have rights to remove existing/old VM snapshots before upgrade.
Verify the free space. You will need ~43 GB space. Some ways to clean space are:
Run a cop file which cleanup the space( may need to do in downtime). Ask Cisco TAC before you do it, it might delete your inactive partition sw.
Reduce the log size.
https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/200581-Procedure-to-Adjust-WaterMark-in-RTMT-of.html
Delete unused load files from CUCM O.S admin –> load management.
Open a Cisco TAC case for support in advance and inform them to requeue the case to engineer who is available in your change window. Put basic details about what you are doing in that case, it will save your time in change window.
Note that you may need to call TAC frontline and may or may not need to raise a Sev in change window as Cisco TAC could be busy with multiple cases.
Read the upgrade guide carefully.
Review the Recommended Sequence in advance from upgrade doc. See some notes here:
Publisher node MUST be Upgraded first.
Switchover options depends on the collaboration product.
CUCM Publisher can be switched over before Subscriber(s) Upgrade Startup.
DRU Only –> Switchover IM&P Publisher after CUCM Cluster Database Replication Completes.
CUC Publisher must NOT be switched over before Subscriber Upgrade Completes.
Try the upgrade in lab/ Pre-pod to avoid any surprises.
Prepare your test plan in advance. What you are gonna test and how are you gonna test it.

Pre-req

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Plan your upgrade

1 day before or in same change window