Active/Active Clustering, Stateful High Availability, and Active/Active DPI licenses are included on registered firewalls. So, you do not need to purchase any additional licenses to use these High Availability features.
You can view system licenses on the System > Licenses page of the management interface. This page also provides a way to log into MySonicWall.
When the firewalls in the Active/Active cluster have Internet access, each appliance in the cluster must be individually registered from the SonicOS management interface while the administrator is logged into the individual management IP address of each appliance. This allows the Secondary units to synchronize with the SonicWall licensing server and share licenses with the associated Primary appliances in each HA pair.
There is also a way to synchronize licenses for an HA pair whose appliances do not have Internet access. When live communication with SonicWall's licensing server is not permitted due to network policy, you can use license keysets to manually apply security services licenses to your appliances. When you register a firewall on MySonicWall, a license keyset is generated for the appliance. If you add a new security service license, the keyset is updated. However, until you apply the licenses to the appliance, it cannot perform the licensed services.
Licenses Available by Platform shows the HA licenses that are included with the purchase of the SonicWall network security appliance. Some platforms require additional licensing to use the Stateful Synchronization or Active/Active DPI features. SonicOS Expanded licenses or High Availability licenses can be purchased on MySonicWall or from a SonicWall reseller.
You can use one of these procedures to apply licenses to an appliance:
Follow the procedure in Activating, Upgrading, or Renewing Services to activate licenses from within the SonicOS user interface. Perform the procedure for each of the appliances in a High Availability Pair while logged into its individual LAN management IP address.
See High Availability > Monitoring for information about configuring individual IP addresses.