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34 | Scenario A: NAT Mode Gateway
Scenario B: Stateful HA Pair
For network installations with two Dell SonicWALL NSA
appliance configured as a stateful synchronized pair for
redundant High Availability (HA) networking.
In this scenario, one NSA appliance operates as the Active
gateway device and the other NSA appliance is in Standby
mode. All network connection information is synchronized
between the two devices so that the Standby appliance can
seamlessly switch to Active mode without dropping connections
if the Active device loses connectivity.
To set up this scenario, follow the steps covered in:
• "Configuring a Stateful HA Pair" on page 37
B
SonicWALL NSA 2600
CONSOLE
SDHC
MGMT
X6 X4
1GE
X2 X0
M0
X1X3X5X7
ALARM
M0
TEST
PWR
Expansion Module
SonicWALL NSA 2600
CONSOLE
SDHC
MGMT
X6 X4
1GE
X2 X0
M0
X1X3X5X7
ALARM
M0
TEST
PWR
Expansion Module
Dell SonicWALL
HA/Failover Pair
Local Network
Dell SonicWALL NSA Appliance 2
Dell SonicWALL NSA Appliance 1
Internet