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41 | Configuring a Stateful HA Pair
Now, power the primary appliance back on, wait a few minutes,
then log back into the management interface. If stateful
synchronization is enabled (automatically disabling preempt
mode), the management GUI should still display Logged Into:
Backup SonicWALL Status: Active in the upper-right-hand
corner.
If you are using the Monitor Interfaces feature, experiment with
disconnecting each monitored link to ensure correct
configuration.
HA License Configuration Overview
You can configure HA license synchronization by associating
two Dell SonicWALL appliances as HA primary and HF
secondary on MySonicWALL. Note that the secondary
appliance of your HA pair is referred to as the HF Secondary
unit on MySonicWALL.
You must purchase a single set of security services licenses for
the HA primary appliance. To use Stateful HA, you must first
activate the Stateful High Availability Upgrade license for the
primary unit in SonicOS. This is automatic if your appliance is
connected to the Internet. See Registering and Licensing Your
Appliance on MySonicWALL, on page 20.
License synchronization is used during HA so that the
secondary appliance can maintain the same level of network
protection provided before the failover. To enable HA, you can
use the SonicOS UI to configure your two appliances as a HA
pair in Active/Idle mode.
MySonicWALL provides several methods of associating the two
appliances. You can start by registering a new appliance, and
then choosing an already-registered unit to associate it with.
You can associate two units that are both already registered.
Or, you can select a registered unit and then add a new
appliance with which to associate it.