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Getting Started with FortiGate by Fabrizio Volpe, Rosato Fabbri

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Full mesh high availability

Earlier in the chapter we talked about the link aggregation and 802.3ad protocol. As we said, the mentioned solutions expand redundancy and high availability also to the hardware devices connecting the FortiGate units to the rest of the network (usually network switches). The required configuration is called Full Mesh HA. The FortiGate cluster will be connected to the network using redundant connections and switches. In the following diagram, we can see a cluster made up of two units (FortiGateA and FortiGateB) connected with a full mesh to the internal network:

Full mesh high availability

All the connections are redundant, including two interfaces ...

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