When a security content package is downloaded, the appliance queries the package to obtain its attributes. Some of the attributes are compared to attributes of the installed security content and to values configured on the target appliance. The criteria that determine whether a downloaded package is compatible are listed in Conditions that indicate a compatible security content package .
If the package passes all applicable compatibility checks, the new security content is installed on the target appliance.
If the package fails a compatibility check, the appliance does the following:
Sends an error code in log messages.
Displays an error message at the CLI.
Performs no further checking on the downloaded package.
Discards the downloaded package without installing
Requires that the next security content update uses a full update package and not a delta update package.