Which two statements are true in this load balancing scenario?

Refer to the exhibit

You are deploying two FortiGate VMS in HA active-passive mode with load balancers in Microsoft Azure

Which two statements are true in this load balancing scenario? (Choose two.)
A . The FortiGate public IP is the next-hop for all the traffic.
B . An internal load balancer listener is the next-hop for outgoing traffic.
C . You must add a route to the Microsoft VIP used for the health check.
D . A dedicated management interface can be used for load balancing.

View Answer

Answer: BD

Explanation:

A is incorrect because the FortiGate public IP is not the next-hop for all the traffic. The FortiGate public IP is only used for incoming traffic from the internet. The Azure load balancer distributes the incoming traffic to the active FortiGate VM based on a health probe123. The FortiGate public IP is not used for outgoing traffic or internal traffic.

B is correct because an internal load balancer listener is the next-hop for outgoing traffic. The internal load balancer listener is configured with a floating IP address that is assigned to the active FortiGate VM. The internal load balancer listener also has a health probe to monitor the status of the FortiGate VMs123. The internal load balancer listener forwards the outgoing traffic to the internet through the public load balancer.

C is incorrect because you do not need to add a route to the Microsoft VIP used for the health check. The Microsoft VIP is an internal IP address that is used by the Azure load balancer to send health probes to the FortiGate VMs123. The Microsoft VIP is not reachable from outside the Azure network and does not require any routing configuration on the FortiGate VMs.

D is correct because a dedicated management interface can be used for load balancing. In this deployment, port4 is used as a dedicated management interface that connects to the management network3. The dedicated management interface can be used to access the FortiGate VMs for configuration and monitoring purposes. The dedicated management interface can also be used to synchronize the configuration and session information between the primary and secondary devices in an HA cluster2.