Fortinet FortiGate FortiGate-3000 Installation Manual page 53

High availability installation
FortiGate-3000 Installation Guide
When you connect to the cluster, you are actually connecting to the primary cluster
unit. The cluster automatically synchronizes all configuration changes to the
subordinate units in the cluster as the changes are made.
The only configuration settings that are not synchronized are the HA configuration
(except for the interface heartbeat device and monitoring configuration) and the
FortiGate host name.
For more information about configuring a cluster, see the FortiGate Administration
Guide.
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Installing and configuring the cluster
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