How Should You Upgrade?
A recommended upgrade path is the ideal path for your device. Firepower devices are capable of executing direct upgrades from one major release to another, such as from Version 6.4.0 > 6.5.0. If a direct upgrade from your current to your target version is not possible, your upgrade path must include either intermediate versions, such as from Version 184.108.40.206 > 6.5.0. To patch Firepower, you must be running the base major version.
You cannot upgrade directly to a patch from a previous major version, such as from Version 220.127.116.11 > 18.104.22.168. You must upgrade to the major release first, and then to a subsequent patch of that release: from Version 22.214.171.124 > 6.5.0 > 126.96.36.199.
Firepower support starts with Version 6.4.0. See the following table for the supported upgrade paths:
|Currently Running Version X||Direct Upgrade To 6.4.0.x||Direct Upgrade To Version 6.5.0||Direct Upgrade To Version 6.5.0.x|
Major Upgrade vs Patch
Note: You cannot use CDO to uninstall or downgrade from a major release. You must reimage the device to revert to a previous version.
Major upgrades may include new features and functionality and entail large-scale changes to the product. Major upgrades will take longer to complete than a patch.
Patch upgrades may contain a limited range of fixes and minor feature updates or enhancements. Patch upgrades will take less time to complete than a major upgrade.