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Configuring a State Sync Pair in
NAT/Route Mode
This section provides instructions for configuring a pair of
SonicWALL NSA E7500 appliances for high availability (HA).
This section is relevant to administrators following deployment
scenario B.
This section contains the following sub-sections:
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Configuring a State Sync Pair in NAT/Route Mode
Initial High Availability Setup
Before you begin the configuration of HA on the Primary
SonicWALL security appliance, perform the following setup:
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On the bottom panel of the Backup SonicWALL security
appliance, locate the serial number and write the number
down. You need to enter this number in the High
Availability > Settings page.
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Verify that the Primary SonicWALL and Backup
SonicWALL security appliances are registered, running the
same SonicOS Enhanced versions.
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Make sure the Primary SonicWALL and Backup
SonicWALL security appliances' LAN, WAN and other
interfaces are properly configured for failover.
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Connect the HA ports on the Primary SonicWALL and
Backup SonicWALL appliances with a CAT6-rated
crossover cable (red crossover cable). The Primary and
Backup SonicWALL security appliances must have a
dedicated connection using the HA interface. SonicWALL
recommends cross-connecting the two together using a
CAT 6 crossover Ethernet cable, but a connection using a
dedicated 100Mbps hub/switch is also valid.
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Power up the Primary SonicWALL security appliance, and
then power up the Backup SonicWALL security appliance.
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Do not make any configuration changes to the Primary's
HA interface; the High Availability configuration in an
upcoming step takes care of this issue. When done,
disconnect the workstation.
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