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Firepower System Release Notes
 
Uninstalling the Update
 
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Uninstalling the Update from Clustered or Paired Appliances
Clustered devices and Firepower Management Centers in high availability pairs must run the same version of the 
Firepower System. Although the uninstallation process triggers an automatic failover, appliances in mismatched 
pairs or clusters do not share configuration information, nor do they install or uninstall updates as part of their 
synchronization. If you need to uninstall an update from redundant appliances, plan to perform the uninstallations 
in immediate succession.
To ensure continuity of operations, uninstall the update from clustered devices and paired Firepower Management 
Centers one at a time. First, uninstall the update from the secondary appliance. Wait until the uninstallation process 
completes, then immediately uninstall the update from the primary appliance.
Caution: 
If the uninstallation process on a clustered device or paired Firepower Management Center fails, do 
not restart the uninstall or change configurations on its peer. Instead, contact Support.
Uninstalling the Update from Devices Deployed Inline
Managed devices do not perform traffic inspection, switching, routing, or related functions while the update is 
being uninstalled. Depending on how your devices are configured and deployed, the uninstallation process may 
also affect traffic flow and link state. For more information, see 
Uninstalling the Update and Online Help 
Uninstalling the Version 6.0.0.1 update does not revert the online help to its previous version. If the version of your 
online help does not match that of your Firepower System software, your online help may contain documentation 
for unavailable features and may have problems with context sensitivity and link functionality.
After the Uninstallation
After you uninstall the update, there are several steps you should take to ensure that your deployment is 
performing properly. These include verifying that the uninstall succeeded and that all appliances in your 
deployment are communicating successfully.
The next sections include detailed instructions not only on performing the update, but also on completing any 
post-update steps. Make sure you complete all of the listed tasks.
Uninstalling the Update from a Managed Device
The following procedure explains how to use the local web interface to uninstall the Version 6.0.0.1 update from 
managed devices. You cannot use a Firepower Management Center to uninstall the update from a managed 
device.
Uninstalling the Version 6.0.0.1 update results in a device running Version 6.0.0. For information on uninstalling a 
previous version, refer to the release notes for that version.
Uninstalling the Version 6.0.0.1 update reboots the device. Managed devices do not perform traffic inspection, 
switching, routing, or related functions during the update. Depending on how your devices are configured and 
deployed, the update process may also affect traffic flow and link state. For more information, see 
.
To uninstall the update from a managed device:
Step 1
Read and understand 
.
Step 2
On the managing Firepower Management Center, make sure that the appliances in your deployment are 
successfully communicating and that there are no issues reported by the health monitor.
Step 3
Monitor the update's progress in the Firepower Management Center’s task queue by clicking the System 
Status icon, then clicking the Tasks tab.