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34 | Advanced Deployment Scenarios
Scenario B: Stateful HA Pair
For network installations with two Dell SonicWALL NSA
appliance appliances configured as a stateful synchronized pair
for redundant High Availability (HA) networking.
In this scenario, one NSA appliance operates as the Primary
gateway device and the other NSA appliance is in Idle mode.
All network connection information is synchronized between the
two devices so that the Secondary appliance can seamlessly
switch to Active mode without dropping connections if the
Primary device loses connectivity.
To set up this scenario, follow the steps covered in:
• Configuring a Stateful HA Pair, page 37
B
SonicWALL NSA 5600
CONSOLE
SDHC
MGMT
X17
X16
X14 X12 X10 X8 X6 X4
1GE
10GE
X2 X0
X1X3X5X7
X9X11X13X15
M0
ALARM
TEST
PWR
SonicWALL NSA 5600
CONSOLE
SDHC
MGMT
X17
X16
X14 X12 X10 X8 X6 X4
1GE
10GE
X2 X0
X1X3X5X7
X9X11X13X15
M0
ALARM
TEST
PWR
Dell SonicWALL
HA/Failover Pair
Dell SonicWALL NSA Appliance 1
Dell SonicWALL NSA Appliance 2
HA Control Link
Local Network
Internet
HA Data Link