The following sections describe how to download software updates to the DTI cache in advance, before an appliance requests them.
Downloading system images to the DTI cache using the CLI
Downloading guest images to the DTI cache using the CLI
Cached guest images that were downloaded on behalf of a particular appliance type can potentially be used for other appliances. Consider the following examples.
A Central Management System administrator initiates a download of guest images for a managed Network Security 7.9.0 appliance. The latest guest images in the DTI network are version 3.
The system checks which guest images version is installed on the Network Security appliance, and determines it is version 2.
The DTI network has a delta file containing the changes between guest images version 2 and 3, so only the delta file is downloaded to the Central Management System cache.
A managed Email Security — Server appliance (EX-01) running release 7.8.0 requests a guest images update. Guest images version 2 is installed on the Email Security — Server appliance, so the delta file in the cache can be used to update the appliance. Nothing needs to be downloaded from the DTI network in this case.
A managed Email Security — Server appliance (EX-02) running release 7.7.0 requests a guest images update. Guest images version 1 is installed on the appliance. The delta file in the cache does not contain the differences between version 1 and 2 of the guest images, so a full update is needed. The complete guest images version 3 is not in the cache, so the Central Management System appliance must download it from the DTI network before it can update the EX-02 appliance.
Note
You cannot manually download security content to the DTI cache. Security content is updated frequently, so there is no benefit to downloading it before a maintenance window. The newest security content is automatically downloaded to the cache when the new security content is released.
Note
You can schedule the DTI cache storage operations using the
jobCLI commands. For details, see the CLI Command Reference.
Operator or Admin access
The type of appliance for which you will download content is connected to the Central Management System appliance.
Minimum appliance release for downloading system images: Network Security 7.5.0, Email Security — Server 7.6.0, Malware Analysis 7.7.0, File Protect 7.7.0, and Endpoint Security (HX) 3.0.0.
Minimum appliance release for downloading guest images: Network Security 7.7.0