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SuperMassive_9800_GSG.book Page 41 Tuesday, September 9, 2014 7:32 PM
Configuring HA Advanced Settings
The following settings are optional. You can configure the
following settings from the High Availability > Advanced page.
1.
Adjust the Heartbeat Interval to control how often the two
units communicate. The default and recommended
minimum is 1000 milliseconds.
2.
The Failover Trigger Level sets the number of heartbeats
that can be missed before failing over. Dell SonicWALL
recommends leaving this field at its default setting, and
adjusting later if needed.
3.
Set the Probe Interval for the interval in seconds between
communication with upstream or downstream systems.
The recommended setting is an interval of at least 5
seconds. You can set the Probe IP Address(es) on the
High Availability > Monitoring screen.
4.
Set the Probe Count, which is the number of consecutive
probes before the appliance considers the network path
unreachable or broken. The default count is 3.
5.
The Election Delay Time is the number of seconds
allowed for internal processing between the two units in the
HA pair before one of them takes the primary role.
Dell SonicWALL recommends leaving this field at its
default setting, then tuning later if needed.
6.
Enable the Active / Standby Failover only when ALL
aggregate links are down checkbox to treat the
aggregated link as down (causing a failover) only if all
member links are down.
7.
Select the Include Certificates/Keys checkbox to have
the appliances synchronize all certificates and keys.
8.
Click Synchronize Settings to synchronize the settings
between the Primary and Secondary appliances.
9.
Click Synchronize Firmware if you previously uploaded
new firmware to your Primary appliance while the
Secondary appliance was offline.
10. Click Force Active / Idle Failover to force a failover
between your Primary and Secondary appliances.
11. Click Accept to retain the settings on this screen.
HA License Configuration Overview
You can configure HA license synchronization by associating
two Dell SonicWALL security appliances as HA Primary and HA
Secondary on MySonicWALL.
You must purchase a single set of security service 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, Licensing, and
Upgrading, page
23.
License synchronization is used during HA so that the
Secondary appliance can maintain the same level of network
protection provided before the failover.
Configuring a Stateful HA Pair |
41
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