Fortinet FortiController-5913C System Manual page 10

FortiController-5913C session-aware load balancing (SALB)
10
• Four FortiController-5913Cs and up to 10 workers in a chassis with dual dual star
architecture (such as the FortiGate-5144C). All four FortiController-5913Cs receive
and load balance sessions to the workers. If a FortiController-5913C fails the other
FortiController-5913Cs continue to operate. All sessions processed by the failed
FortiController-5913C are lost.
Figure 2: Example FortiController-5913C load balanced cluster
Internal network
You can also create the following FortiController-5913C dual-chassis SALB
configurations:
• One FortiController-5913C and up to 12 workers in each chassis. The
FortiController-5913C in one chassis receives all sessions and load balances them to
the workers in that chassis. If that FortiController-5913C fails, all sessions failover to
the FortiController-5913C in the other chassis.
• Two FortiController-5913Cs in HA mode and up to 12 workers in each chassis. The
primary FortiController-5913C in one chassis receives all sessions and load balances
them to the workers in that chassis. If the primary FortiController-5913C fails,
sessions failover to the primary FortiController-5913C in the second chassis. If the
primary FortiController-5913C in the second chassis fails, sessions fail over to one of
the backup FortiController-5913Cs.
FortiController-5913C Session-Aware Load Balancing Cluster (SLBC) System Guide
Load Balanced Traffic
on Fabric Backplane
Single
FortiController
Slot 1
F1 (fctrl/f1)
F2 (fctrl/f2)
Management
(mgmt)
Management and
Control Traffic on
Base Backplane
FortiController-5913C system
FortiGate
Worker Boards
Slots 3 to 14
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