A customer just bought an additional FortiGate device and plans to use their existing load balancer to distribute traffic across two FortiGate units participating on a BGP network serving different neighbors. The customer has mixed traffic of IPv4 and IPv6 TCP, UDP, and ICMP. The two FortiGate devices shown in the exhibit should be redundant to each other so that the NAT session and active session tables will synchronize and fail over to the unit that is still operating without any loss of data if one of the units fail.
Which high availability solution would you implement?