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29 | Selecting a Deployment Scenario
Scenario B: State Sync Pair in NAT/Route
Mode
For network installations with two Dell SonicWALL NSA E-Class
appliances configured as a stateful synchronized pair for
redundant high-availability networking.
In this scenario, one Dell SonicWALL NSA E8510 operates as
the primary gateway device and the other Dell SonicWALL NSA
E8510 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 connections if the primary device loses connectivity.
Note: Active/Active Deep Packet Inspection (A/A DPI)
functionality is also available for high-availability
deployments. For more information on the benefits and
setup instruction for Active/Active DPI, see the
“SonicOS Active/Active Feature Module” at:
www.sonicwall.com/us/support
To set up this scenario, follow the steps covered in:
• Initial Setup - page 31
• Configuring L2 Bridge Mode - page 44
• Additional Deployment Configuration - page 46
Note: Follow the steps in the Initial Setup section, on page 31
before completing State Sync Pair setup.
B
E8510
Network Security Appliance
10GE
E8510
Network Security Appliance
10GE
SonicWALL
HA/Failover Pair
SonicWALL NSA E-Class 1
SonicWALL NSA E-Class 2
HA Link
Local Network