Example: If the OVA defines 16 GB RAM, reserve all 16 GB.
If you’ve ever deployed Cisco Unified Communications Manager (CUCM) in production, you already know: this is not a “throw it on any VMware cluster” situation. cisco cucm virtualization requirements
Have a war story about a CUCM virtualization requirement you missed? Share it in the comments below. This post reflects best practices based on CUCM 12.x/14.x. Always check the latest Cisco documentation before deployment. Example: If the OVA defines 16 GB RAM, reserve all 16 GB
When in doubt:
show status show hardware show version active Then cross-reference with the (you’ll need a Cisco.com login). The Bottom Line CUCM in a VM is incredibly stable—if you follow the rules. Cisco’s requirements aren’t bloated; they exist because UC is real-time, intolerant of jitter, and demands deterministic resources. Share it in the comments below
Let’s break down exactly what you need to know. Cisco publishes a Unified Communications Virtualization Compatibility Matrix (updated quarterly). If your hardware, hypervisor, or CPU isn’t listed there for your specific CUCM version— it is not supported.