82 Fortinet Inc.
HA in Transparent mode High availability

Starting the HA cluster

After all of the FortiGate units in the cluster are configured for HA and once the cluster
is connected, use the following procedure to start the HA cluster.
1Power on all of the HA units in the cluster.
As the units power on they negotiate to choose the primary cluster unit and the
subordinate units. This negotiation occurs with no user intervention.
When negotiation is complete the cluster is ready to begin processing network traffic.
You can use the information in “Managing the HA cluster” on page86 to log into and
manage the cluster.
HA in Transparent mode
Use the following steps to configure a group of FortiGate units to operate as an HA
cluster in Transparent mode.
Installing and configuring the FortiGate units
Configuring the HA interface and HA IP address
Configuring the HA cluster
Connecting the HA cluster to your network
Starting the HA cluster

Installing and configuring the FortiGate units

Follow the instructions in “Transparent mode installation” on page61 to install and
configure the FortiGate units. All of the FortiGate units in the HA cluster should have
the same configuration. Do not connect the FortiGate units to the network. Instead,
proceed to “Configuring the HA interface and HA IP address”.

Configuring the HA interface and HA IP address

Configure the 4/HA interfaces of all of the FortiGate-400s in the HA cluster to operate
in HA mode. When you switch the 4/HA interface to HA mode, the System > Config >
HA options become active. When running in HA mode, the 4/HA interfaces cannot be
connected to a network because they are dedicated to HA communication.
The 4/HA interface of each FortiGate-400 unit must be configured with a different IP
address. The addresses of the 4/HA interfaces must be on the same subnet and they
must be configured for management access.
Repeat the following procedure for each FortiGate unit in the HA cluster:
1Connect to the FortiGate unit and log into the web-based manager.
2Go to System > Network > Management.
3For the port4/ha interface, select HA to configure port4/ha for HA operation.
4Select the management Access methods for the port4/ha interface.