Guidelines and Warnings
These important guidelines and warnings apply to Firepower hotfixes.
You apply hotfixes the same way you apply patches. For instructions, see one of:
Cisco Firepower Management Center Upgrade Guide: Hotfix FMCs and their managed devices
Cisco ASA Upgrade Guide: Hotfix ASA FirePOWER modules with ASDM
Cisco Firepower Threat Defense Configuration Guide for Firepower Device Manager: Hotfix FTD with FDM
Do not attempt to uninstall a hotfix. Instead, contact Cisco TAC.
Unresponsive or Unsuccessful Hotfixes
Do not deploy changes to or from, manually reboot, or shut down an appliance while you are applying a hotfix. Do not restart a hotfix in progress. Do not apply the same hotfix more than once to a single appliance. If you encounter issues with a hotfix, including a failed hotfix or unresponsive appliance, contact Cisco TAC.
Traffic Flow, Inspection, and Device Behavior
Applying a hotfix to a device can cause interruptions in traffic flow and inspection, especially if the hotfix reboots the device, or when you deploy configurations (Snort process restarts).
Device type, deployment type (standalone, high availability, clustered), and interface configurations (passive, IPS, firewall, and so on) determine the nature of the interruptions. We strongly recommend applying hotfixes in a maintenance window or at a time when any interruption will have the least impact on your deployment.