Configuring High Availability - Dell NSA E8500 Getting Started Manual

Initial High Availability Setup
Before you begin the configuration of HA on the Primary Dell
SonicWALL security appliance, perform the following setup:
• On the bottom panel of the secondary Dell SonicWALL
security appliance, locate the serial number and write the
number down. You need to enter this number in the High
Availability > Settings page.
• Verify that the primary and secondary Dell SonicWALL
security appliances are registered, running the same
SonicOS versions.
• Make sure the primary and secondary Dell SonicWALL
security appliances' LAN, WAN and other interfaces are
properly configured for failover.
• Connect the HA ports on the primary and secondary Dell
SonicWALL appliances with a CAT6-rated crossover cable
(red crossover cable). The primary and secondary Dell
SonicWALL security appliances must have a dedicated
connection using the HA interface. Dell SonicWALL
recommends cross-connecting the two together using a CAT
6 crossover Ethernet cable, but a connection using a
dedicated 100Mbps hub/switch is also valid.
37 | Configuring a Stateful HA Pair
• Power up the primary Dell SonicWALL security appliance,
and then power up the secondary Dell SonicWALL security
appliance.
• Do not make any configuration changes to the primary's HA
interface; the High Availability configuration in an upcoming
step takes care of this issue. When done, disconnect the
workstation.

Configuring High Availability

The first task in setting up HA after initial setup is configuring
the High Availability > Settings page on the primary Dell
SonicWALL security appliance. Once you configure HA on the
primary Dell SonicWALL security appliance, it communicates
the settings to the secondary Dell SonicWALL security
appliance.
To configure HA on the primary appliance, perform the following
steps:
1. Navigate to the High Availability > Settings page.
2. Select the Enable High Availability checkbox.
3. Under SonicWALL Address Settings, type in the serial
number for the secondary Dell SonicWALL appliance.
You can find the serial number on the bottom of the Dell
SonicWALL security appliance, or in the System > Status
screen of the secondary unit. The serial number for the
primary Dell SonicWALL is automatically populated.
4. Click Apply to retain these settings.