Getting Started With High Availability; Before Configuring High Availability; Network Configuration For High Availability Pair - SonicWALL TELE3 SP Administrator's Manual

Getting Started with High Availability

Before Configuring High Availability

Before attempting to configure two SonicWALLs as a High Availability pair, check the
following requirements:
• You have two (2) SonicWALL 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 Service
Provider (ISP). Two (2) valid, static IP addresses are required to remotely manage 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 are not supported in the event of a failure 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.
Note: The two SonicWALLs in the High Availability pair sends "heartbeats" over the LAN
network segment. The High Availability feature does not function if the LAN ports are not
connected.
Page 162 SonicWALL TELE3 SP Administrator's Guide