Fortinet FortiSwitch-5003B System Manual page 16

Enhanced Load Balance Clustering (ELBC)
16
Figure 4: Example ELBC configuration
External 10-gigabit
network
Internal 10-gigabit
network
If you install a second FortiSwitch-5003B board you can configure active-passive ELBC
HA. In an HA configuration, if the FortiSwitch-5003B board in slot 1 fails, all sessions are
failed over to the FortiSwitch-5003B board in slot 2 with only a minimal traffic
interruption. To be able to form a cluster, both of the FortiSwitch-5003B boards in an
ELBC HA cluster must have part numbers of P11000-01 and up or both must have part
numbers lower than P11000-01.
Load Balancing over
10-gigabit Fabric
FortiSwitch-5003B
board
Slot 1
FortiSwitch-5003B system
channel
FortiGate-5001B
Boards
4 6 8
FortiSwitch-5003B System Guide
01-400-134822-20120216
http://docs.fortinet.com/