Virtual clusters

This chapter describes virtual clustering, a variation of FGCP HA for FortiGates with multiple VDOMs. Virtual clustering operates in active-passive HA mode for clusters of up to four FortiGates. Active-passive virtual clustering uses VDOM partitioning to distribute traffic for different VDOMs between the primary and backup FortiGates.

If your FortiGate is operating with multiple VDOMs you can also configure active-active HA. However, active-active HA with multiple VDOMs does not support VDOM partitioning.