Cucm Virtualization [exclusive] Guide

Mariana leaned back. The virtualized CUCM wasn't just a backup—it was better . No more spinning disks. No more single points of failure. The UCS chassis had redundant PSUs, redundant fabric interconnects, and vMotion. If a host failed, the CUCM VMs would restart on another host in under two minutes.

Starting Cisco CallManager...

Mariana smiled. She had just saved the company $200,000 in hardware refresh costs and turned a weekend-long crisis into a quiet Tuesday night.

CUCM is picky about MAC addresses. Change a virtual NIC's MAC after installation, and the entire node's certificate chain explodes. She'd learned that the hard way during testing. Tonight, she triple-checked the port group settings: VLAN 10 for PUB, VLAN 11 for SUB1, VLAN 12 for SUB2. The Cisco switchports were pre-configured with spanning-tree portfast and switchport voice vlan . The VMs would never know they weren't physical.