Active-Passive SLBC with two FortiController-5103Bs

This example describes the basics of setting up an active-passive SLBC cluster that consists of two FortiController-5103Bs, installed in chassis slots 1 and 2, and three FortiGate-5001C workers, installed in chassis slots 3, 4, and 5. This SLBC configuration can have up to eight redundant 10Gbit network connections.

The FortiControllers in the same chassis to operate in active-passive HA mode for redundancy. The FortiController in slot 1 becomes the primary unit actively processing sessions. The FortiController in slot 2 becomes the secondary unit, sharing the primary unit’s session table. If the primary unit fails the secondary unit resumes all active sessions.

All networks have redundant connections to both FortiControllers. You also create heartbeat links between the FortiControllers and management links from the FortiControllers to an internal network.