What Happens after PAN-OS Installation without firewall reboot

What Happens after PAN-OS Installation without firewall reboot

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Created On 10/21/22 12:43 PM - Last Modified 03/11/25 23:12 PM


Question


What happens to the PAN-OS version running on the firewall after installing another version without rebooting?

 

Environment


  • Palo Alto Firewalls
  • Supported PAN-OS
  • Upgrade/Downgrade

Answer


  1. A firewall reboot is required after a PAN-OS upgrade or downgrade.
  2. If you choose not to reboot immediately after the installation, the installed PAN-OS stays in the memory,
  3. It does not take effect without a reboot.
  4. If another PAN-OS version is installed before the reboot, it overrides the previously installed version that is pending in the memory.
  5. Now the newly installed The PAN-OS version will be loaded when the firewall is rebooted.
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