You must configure an environment with dual-homed servers connected to a pair of FortiSwitch units using an MCLAG.
Multicast traffic is expected in this environment, and should ensure unnecessary traffic is pruned from links that do not have a multicast listener.
In which two ways must you configure the igmps-flood-traffic and igmps-flood-report settings? (Choose two.)
To ensure unnecessary multicast traffic is pruned from links that do not have a multicast listener, the igmps-flood-traffic and igmps-flood-report settings must be configured carefully. Disabling these settings on the ISL and FortiLink trunks ensures that multicast traffic is not unnecessarily flooded through these links. Conversely, enabling these settings on the ICL trunks allows the network to efficiently manage IGMP reports and multicast traffic. Therefore, you should disable these settings on both the ISL and FortiLink trunks.
https://docs.fortinet.com/document/fortiswitch/7.0.8/devices-managed-by-fortios/801194/deploying-mclag-topologies
The mcast-snooping-flood-traffic and igmp-snooping-flood-reports settings must be disabled on the ISL and FortiLink trunks; but the mcast-snooping-flood-traffic and igmp-snooping-flood-reports settings must be enabled on ICL trunks. These settings are enabled by default.
Sorry B and C are correctNOTE: If you are going to use IGMP snooping with an MCLAG topology: On the global switch level, mclag-igmpsnooping-aware must be enabled. It is enabled by default. The mcast-snooping-flood-traffic and igmp-snooping-flood-reports settings must be disabled on the ISL and FortiLink trunks; but the mcast-snooping-flood-traffic and igmp-snooping-flood-reports settings must be enabled on ICL trunks. These settings are enabled by default.
Answer: A, D To ensure that unnecessary multicast traffic is pruned from links that do not have a multicast listener, you must disable IGMP flood traffic on the ICL trunks and enable IGMP flood reports on the ISL and FortiLink trunks. Disabling IGMP flood traffic will prevent the FortiSwitch units from flooding multicast traffic to all ports on the ICL trunks. This will help to reduce unnecessary multicast traffic on the network. Enabling IGMP flood reports will allow the FortiSwitch units to learn which ports are interested in receiving multicast traffic. This will help the FortiSwitch units to prune multicast traffic from links that do not have a multicast listener.
B and C are correct, according to MCLAG requirement