CUCM 11.5 - Add vCPUs from ova with 2,500 to 10,000 users

[Leah Sittig]

CUCM 11.5.1.15900-18

VMware ESXi, 6.0.0, 3073146

Due to CPU spikes, we would like to move from the original OVA of 2500 users to 10K users.  We have a maintenance window and I want to verify this is the correct procedure:

Gracefully turn off the CUCM Publisher Virtual Machine

Access the CUCM server using CLI --> utils system shutdown and enter yes

Access the vSphere client, Select the VM and Edit the settings.

Select the Hardware and update the CPUs, in this case 4 vCPUs.

Power on the virtual machine.

Access the CUCM Server using CLI --> show hardware to see the 4 vCPUs.

Repeat on the remaining subscribers

[Jaime Valencia · Accepted solution]

That's just 1/3 of what you need to to, you need to match vCPU, vRAM and vDisk to what is shown here for each OVA capacity:

https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/uc_system/virtualization/virtualization-cisco-unified-communications-manager.html

And to make sure that your HW is supported for the 10K specs that are required.

[Leah Sittig]

So if i can update the vcpu to 4 and vram to 8 and the vdisk to 110gb that is all i need to do?

[Jaime Valencia]

Yes, assuming you're running on HW that supports the 10K OVA.

[hicham kammah]

Hi Jaime,

I have the same case, the only change ils that m'y architecture are on v12.5, ans im switching to a méga cluster for 60000 users.

Actually, WE have an architecture with 6 serveurs, (pub + 2 tftp + 3 subscriber) and WE will switch to 14 serveurs as Cisco sizing tools ( fyi tha design IS validated by Cisco also).

My question, i want to know if i Can upgrade hardware capacité from (2500 users) to (10000 uers with 4vcpu+ 3vram + 110 vdisk) directory from vsphere, without insatllaing New ova 10k users + backup restor from thé old VM toi New one.

Beat regards

[hicham kammah]

There is a copfile for that case ?

Thanks for your help