27 | Selecting a Deployment Scenario
Scenario B: State Sync Pair in NAT/Route
Mode
For network installations with two Dell SonicWALL NSA E6500
appliances configured as a stateful synchronized pair for
redundant high-availability networking.
In this scenario, one NSA E6500 operates as the primary
gateway device and the other NSA E6500 is in passive mode.
All network connection information is synchronized between the
two devices so that the secondary appliance can seamlessly
switch to active mode without dropping any connections if the
primary device loses connectivity.
Note: Active/Active pair functionality is also available for
high-availability deployments. For more information on
the benefits and setup instruction for Active/Active pair,
see the “SonicOS Active/Active Feature Module” at
http://www.sonicwall.com/us/support.html
To set up this scenario, follow the steps covered in Initial Setup,
on page 29
and Configuring a Stateful HA Pair, on page 36. If
you have completed setup procedures in those sections,
continue to Additional Deployment Configuration, on page 46,
to complete configuration.
SonicWALL NSA E-Class 1
SonicWALL NSA E-Class 2
B
E6500
Network Security Appliance
E6500
Network Security Appliance
Local Network
SonicWALL
HA / Failover Pair
Internet
HA Link
