Click the Exhibit button. Referring to the exhibit, the source is currently sending multicast traffic using group 224.1.1.1, which is being received by R1. R2 is not receiving PIM register messages. What would be the cause of this problem?
A.
Tunnel services have not been enabled on R1.
B.
All routers have not been configured with the same Auto-RP discovery group.
C.
R5 has not received an IGMP report of 224.1.1.1.
A is the correct answer. The multicast traffic being sent by the source must be encapsulated into a PIM register packet. If the tunneling services under the chassis stanza is not configured, a PE (PIM Encapsulation interface) will not be present in the multicast first hop router. Anyway long story short, tunneling services must be turned on or else you will not get PIM register messages sent to the RP.
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