Cisco Identity Services Engine Upgrade Guide Release 3.5

This guide provides detailed instructions for upgrading Cisco Identity Services Engine (ISE) software to release 3.5 on various deployment types, including standalone and multi-node configurations. It outlines the upgrade paths available, specifically the single-step and two-step upgrade processes, depending on the current version in use. The document emphasizes the importance of following the specified order of steps to minimize downtime during the upgrade. It also includes preparation tasks such as health checks, data validation, and configuration backups. Additionally, the guide covers post-upgrade tasks and settings that need to be adjusted after the upgrade process is completed. Specific details regarding supported operating systems for virtual machines and licensing information are also included, ensuring users are well-informed about the requirements and considerations necessary for a successful upgrade.