350-601: Implementing and Operating Cisco Data Center Core TechnologiesDemo

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QuestionQ59

Network

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Refer to the exhibit. A source sends a multicast traffic stream to the receiver. How is the multicast traffic expected to traverse the network when it reaches a vPC peer?

  • A • The multicast traffic is not replicated to the ports that joined a multicast group (224.0.0.13) or the peer link.• The multicast traffic stream flows over the vPC link to ensure that orphan ports get the multicast stream in failure scenarios.
  • B • The multicast traffic is replicated to the ports that joined a given multicast group and the peer link.• The multicast traffic stream flows from Agg-1 to Agg-2 over the M1-to-M2 peer link and forwards the traffic over Layer 4 to Access-2.
  • C • The multicast traffic is replicated to the ports that joined a given multicast group and the peer link.• The multicast traffic stream flows over the peer link to ensure that orphan ports receive the multicast stream in failure scenarios.
  • D • The multicast traffic is not replicated to the ports that joined a multicast group (224.0.0.13) or the peer link.• The multicast traffic stream flows from Agg-1 to Agg-2 over the M1-to-M2 peer link and forwards the traffic over Layer 4 to Access-2.
Explanation

With vPC IGMP snooping, multicast traffic is replicated to interfaces that have joined the multicast group. By default, the vPC peer-link is considered an IGMP snooping multicast-router port, so multicast traffic is also sent across that peer-link. This enables multicast delivery for VLANs with orphan ports in applicable failure scenarios.

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