SonicWALL NSA E7500 Getting Started Manual page 23

Scenario B: State Sync Pair in NAT/Route Mode
For network installations with two SonicWALL NSA E-Series
appliances configured as a stateful synchronized pair for
redundant high-availability networking.
In this scenario, one SonicWALL NSA E7500 operates as the
primary gateway device and the other SonicWALL NSA E7500
is in passive mode. All network connection information is
synchronized between the two devices so that the backup
appliance can seamlessly switch to active mode without
dropping any connections if the primary device loses
connectivity.
To set up this scenario, follow the steps covered in the
Configuring a State Sync Pair in NAT/Route
Setup and the
Mode
- page 32 sections. If you have completed setup
procedures in those sections, continue to the
Additional Deployment Configuration
complete configuration.
Page 22 Selecting a Deployment Scenario
Initial
section, on page 41 to
B
SonicWALL NSA E-Class 2
SonicWALL
HA/Failover Pair
SonicWALL NSA E-Class 1
Network Security Appliance
Local Network
E7500
HA Link