By default, Cisco upgrade ISOs obtained from the software download center cannot be used to boot a fresh virtual machine or server. To use this for a new installation (e.g., in a lab environment), you must manually make it bootable. How to Create a Bootable ISO If you are using this for a lab or testing environment Bootable UCSInstall UCOS UNRST 8.6.2.10000-14.sgn.iso
: Stands for Unrestricted . This means the software does not contain strong cryptographic capabilities for signaling and media encryption, allowing it to be exported to countries with strict encryption import controls.
To use this specific file for a fresh installation (e.g., on a virtual machine in a lab), you must manually modify it to be bootable. This is typically done using tools like UltraISO or command-line utilities like mkisofs . Method 1: Using UltraISO (Windows) the original ISO in UltraISO.
: The specific version and build number of the software.
If deploying on bare metal, this image is verified for specific legacy Cisco MCS 7800 series Media Convergence Servers or early-generation Cisco UCS B-Series Blades and C-Series Rack Servers (e.g., M1/M2 generations).
Minimum 1 vCPU for small virtual labs; physical servers vary by model Installation & Upgrade Notes Fresh Installation : You can use this bootable ISO to install CUCM on a Cisco UCS server or a supported VMware ESXi virtual environment. Refresh Upgrade By default, Cisco upgrade ISOs obtained from the
: Refers to the "Unified Communications Software" installer.
A USB flash drive with a minimum capacity of 8GB. The size may vary depending on the ISO file size, but 8GB is generally sufficient for most UCS installations.
: In virtualized environments, experts recommend removing unnecessary platform folders like OpenStack , HAL , and RHEV to force the installer to use specific KVM/VMware drivers.
