In a PIM Sparse Mode Network, How to Restore the Flow

question 102

Multiple Choice

In a PIM sparse mode network, how to restore the flow of multicast traffic when a link fails along a branch of a multicast distribution tree?

• A) The traffic reverts to the shared tree while the downstream router recalculates the RPF interface and sends a new PIM join message to the RP.
• B) The downstream receivers notice the loss of the multicast flow and resend PIM join messages to reestablish the tree.
• C) The downstream receivers notice the loss of the multicast flow and resend IGMP Membership Reports to reestablish the tree.
• D) The router downstream of the break recalculates the RPF interface when it notices a change in the unicast routing table and immediately sends a new PIM join message out from the new RPF.

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