Refer to the exhibit.

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.

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.

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.

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.