SonicWALL 3500 User Manual

Page 28

  Configuring a State Sync Pair in NAT/Route Mode  

Configuring a State Sync Pair in 
NAT/Route Mode

This section provides instructions for configuring a pair of 
SonicWALL NSA appliances for high availability (HA). This 
section is relevant to administrators following deployment 
scenario B.

This section contains the following sub-sections:

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Initial High Availability Setup

Before you begin the configuration of HA on the Primary 
SonicWALL security appliance, perform the following setup:

1.

On the bottom panel of the Backup SonicWALL security 

appliance, locate the serial number and write the number 

down. You need to enter this number in the High 

Availability > Settings page.

2.

Verify that the Primary SonicWALL and Backup 

SonicWALL security appliances are registered, running the 

same SonicOS Enhanced versions, and running the same 

SonicWALL Security services.

3.

Make sure the Primary SonicWALL and Backup 

SonicWALL security appliances’ LAN, WAN and other 

interfaces are properly configured for failover.

4.

Connect the X5 ports on the Primary SonicWALL and 

Backup SonicWALL appliances with a CAT6-rated 

crossover cable (red crossover cable). The Primary and 

Backup SonicWALL security appliances must have a 

dedicated connection. SonicWALL recommends cross-

connecting the two together using a CAT6 crossover 

Ethernet cable, but a connection using a dedicated hub/

switch is also valid.

5.

Power up the Primary SonicWALL security appliance, and 

then power up the Backup SonicWALL security appliance.

6.

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.

Network Security Appliance

Network Security Appliance

Internet

X5 HA Link