Fortinet 100A - Manual (Page 85)

System config HA configuration
FortiGate-100A Administration Guide 01-28007-0068-20041203
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An active-passive (A-P) HA cluster, also referred to as hot standby HA, consists of a
primary FortiGate unit that processes traffic, and one or more subordinate FortiGate
units. The subordinate FortiGate units are connected to the network and to the
primary FortiGate unit but do not process traffic.
Active-active (A-A) HA load balances network traffic all the FortiGate units in the
cluster. An active-active HA cluster consists of a primary FortiGate unit that processes
traffic and one or more subordinate units that also process traffic. The primary
FortiGate unit uses a load balancing algorithm to distribute virus scanning to all the
FortiGate units in the HA cluster.
By default the FortiGate unit load balances virus scanning among all of the FortiGate
units in the cluster. Using the CLI, you can configure the FortiGate unit to load balance
all network traffic among the FortiGate units in the cluster. See the FortiGate CLI
Reference Guide for more information.
For more information about FortiGate HA and the FGCP, see the FortiGate High
Availability Guide.
HA configuration
Go to System > Config > HA and use the options described below to configure HA.
Figure 30: HA configuration
Standalone Mode
Standalone mode is the default operation mode. If Standalone mode is selected the
FortiGate unit is not operating in HA mode.
Select Standalone Mode if you want to stop a cluster unit from operating in HA mode.
High Availability
Select High Availability to operate the FortiGate unit in HA mode. After selecting High
Availability, complete the remainder of the HA configuration.