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Exam NSE8_812 topic 1 question 60 discussion

Actual exam question from Fortinet's NSE8_812
Question #: 60
Topic #: 1
[All NSE8_812 Questions]

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.)

  • A. disable on ICL trunks
  • B. enable on ICL trunks
  • C. disable on the ISL and FortiLink trunks
  • D. enable on the ISL and FortiLink trunks
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Suggested Answer: BC 🗳️
by Viewable8041 at Sept. 7, 2023, 2:43 p.m.

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HongHCMC
3 months, 1 week ago
B and C are correct, according to MCLAG requirement
upvoted 2 times
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ama6
9 months, 2 weeks ago
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.
upvoted 3 times
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ama6
9 months, 3 weeks ago
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.
upvoted 1 times
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Viewable8041
10 months, 1 week ago
Selected Answer: BC
https://docs.fortinet.com/document/fortiswitch/7.0.8/devices-managed-by-fortios/801194/deploying-mclag-topologies
upvoted 4 times
re_j0hn
4 months, 4 weeks ago
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.
upvoted 1 times
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