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DCID Exam - Question 78


An engineer is building a data center network with VXLAN EVPN. The requirement is to use multicast for the broadcast, unknown unicast, and multicast replication.

Which two VNI to multicast group mapping methods must be used to meet these requirements? (Choose two.)

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Correct Answer: BC

To meet the requirements of using multicast for broadcast, unknown unicast, and multicast replication in a VXLAN EVPN, one VNI to one multicast group is a commonly used method as it simplifies the configuration and management, ensuring each VNI is mapped to a distinct multicast group. Additionally, many VNI to one multicast group is another valid method where multiple VNIs share the same multicast group, which can be useful for reducing the total number of multicast groups in use. Both methods are commonly used in VXLAN implementations to handle BUM (Broadcast, Unknown unicast, and Multicast) traffic efficiently.

Discussion

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Wasamela
Jul 8, 2024

Correct

lurker8000
Nov 24, 2024

I'm going with B and C, the question says "Which two VNI mcast group mapping"...

lurker8000Options: BC
Nov 24, 2024

going with this

k3rnelpanicpjOptions: BC
Jan 26, 2025

NVE is network virtual interface for VXLAN encapsulation/decapsulation - exist only one. VNI can be mapped to multicast group in manner: 1 VNI :1 MCastGroup Many VNI: 1McastGroup