Getting Started With High Availability; Before You Start; Network Configuration For High Availability Pair - Dell SonicWALL GX250 Manual

Getting Started with High Availability

Before You Start

Before attempting to configure two SonicWALLs as a High Availability pair, check the
following requirements:
• You have two (2) SonicWALL GX 250, two (2) GX650, two (2) PRO, or two PRO-Vx
Internet Security Appliances. The High Availability pair must consist of two identical
SonicWALL models.
• You have at least one (1) valid, static IP address available from your Internet Serv-
ice Provider (ISP). Two (2) valid, static IP addresses are required to remotely man-
age both the primary SonicWALL and the backup SonicWALL.
Note: SonicWALL High Availability does not support dynamic IP address assignment
from your ISP.
• Each SonicWALL in the High Availability pair must have the same firmware version
installed.
• Each SonicWALL in the High Availability pair must have the same upgrades and
subscriptions enabled. If the backup unit does not have the same upgrades and
subscriptions enabled, these functions will not be supported in the event of a fail-
ure of the primary SonicWALL.

Network Configuration for High Availability Pair

The following diagram illustrates the network configuration for a High Availability pair:
All SonicWALL ports being used must be connected together with a hub or switch. Each
SonicWALL must have a unique LAN IP Address on the same LAN subnet. If each
SonicWALL has a unique WAN IP Address for remote management, the WAN IP
Addresses must be in the same subnet.
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Primary SonicW Primar y SonicWALL ALL
Backup SonicWALL Backup SonicW ALL
DMZ Network DMZ Network
LAN Network LAN Network
Segment Segment
Segment Segment