[PAN-OS 9.1] ──> [PAN-OS 10.0] ──> [PAN-OS 10.1] ──> [PAN-OS 10.2] 1. Pre-Upgrade Preparation
Ensure the PA-220 has enough disk space for the new image. If necessary, delete older, unused images. pa-220 firmware
At the heart of the PA-220 is PAN-OS, Palo Alto Networks’ proprietary operating system that natively classifies all traffic, inclusive of applications, and provides consistent networking, security, threat prevention, and management functionality across all platforms. As with any security appliance, keeping the firmware—technically referred to as PAN-OS software—up to date is one of the most critical tasks for any network administrator. Outdated firmware exposes your organization to known vulnerabilities, leaves you without critical security features, and can lead to performance degradation or stability issues. [PAN-OS 9
Ensure there is sufficient space in the software partition. At the heart of the PA-220 is PAN-OS,
Choosing a firmware version for the PA-220 involves understanding the distinction between the latest features and stability. Palo Alto Networks categorizes releases into major, minor, and maintenance versions. For a production environment, the goal is typically to find the "Preferred Release." These are specific versions designated by Palo Alto engineering as having met rigorous stability criteria in the field. Administrators should consult the Palo Alto Networks Customer Support Portal to identify which version currently holds the preferred status for the 10.x or 11.x release trains. The Upgrade Path and Compatibility