If a node in your cluster suffers a catastrophic failure and cannot boot, you use this ISO to reinstall the OS and application before restoring data from a DRS (Discovery and Recovery System) backup.

Upload the .iso file to your ESXi datastore. Edit the settings of your VM and map the CD/DVD drive to the ISO file. Ensure "Connect at Power On" is checked. 2. Boot the VM

CUCM 8.6 is an older "End of Life" (EoL) version. If you are recovering a system, plan an upgrade path to a supported version like 12.5 or 14 to maintain security patches.

Signifies it is a Unified Communications Software Installation file.

Indicates the ISO image contains a boot loader, allowing it to be mapped to a virtual machine (VM) to start an installation from scratch.

Choose the specific UC application (e.g., CUCM or Unity Connection). Network Configuration: Enter your static IP and hostname.

Enter your organization's details to generate self-signed certificates. 4. Post-Install

Static IP, Subnet Mask, Gateway, and DNS details.

This password is used for cluster communication and must be remembered to add subscriber nodes later.

Power on the VM. The system will boot into the Cisco "Anaconda" installer. You will be prompted to perform a media check; while time-consuming, it is recommended to ensure the file isn't corrupted. 3. Follow the Wizard