300-415 Question 162
Single answerAn enterprise is deploying Cisco SD-WAN and requires multicast traffic to flow seamlessly between branch sites. The organization uses PIM-SM (Protocol Independent Multicast - Sparse Mode) in its existing network. Which of the following statements about Cisco SD-WAN multicast support is correct?
- A
Cisco SD-WAN natively supports PIM-SM to enable multicast routing across the overlay network.
- B
Cisco SD-WAN uses OMP (Overlay Management Protocol) to distribute multicast routing information and replicate multicast traffic across the fabric.
- C
Multicast traffic in Cisco SD-WAN requires the use of GRE tunnels for replication and forwarding.
- D
Cisco SD-WAN supports multicast using replication at the Edge Router or vEdge without leveraging OMP.
Show answer and explanation
Correct answer: B
Explanation
Cisco SD-WAN supports multicast by leveraging the Overlay Management Protocol (OMP) to distribute multicast routing information across the SD-WAN fabric. OMP enables efficient multicast traffic replication and forwarding, eliminating the need for traditional multicast routing protocols like PIM-SM in the overlay network. This ensures seamless multicast traffic delivery between branch sites without additional tunneling mechanisms.
- A. Incorrect.
Incorrect: Cisco SD-WAN does not natively support PIM-SM. Instead, it uses OMP to manage multicast traffic across the overlay network.
- B. Correct.
Correct: Cisco SD-WAN uses the Overlay Management Protocol (OMP) to distribute multicast routing information and ensures multicast traffic is replicated and forwarded across the SD-WAN fabric.
- C. Incorrect.
Incorrect: GRE tunnels are not required for multicast in Cisco SD-WAN. The SD-WAN fabric handles multicast replication natively using OMP and optimized mechanisms.
- D. Incorrect.
Incorrect: While replication can occur at the Edge Router or vEdge, OMP is still leveraged for managing multicast routing information and traffic distribution.