Multicast - Protocol Independent Multicast
11 important questions on Multicast - Protocol Independent Multicast
There are multiple Multicast Routing Protocols, what is the only one that is fully supported by Cisco?
How do Multicast routers define the path that IP Multicast traffic follows?
1. Source Tree (Shortest Path Tree)
2. Shared Tree
How does a Multicast Source Tree work?
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What is the notation of the forwarding state of Source Tree or Shortest Path Tree?
What is different about a Shared Tree or RP Tree vs a Source Tree?
What is the notation of the forwarding state of a Shared Tree or Rendezvous Point Tree (RPT)?
What are the 5 PIM operating modes?
PIM Sparse Mode (PIM-SM)
PIM Sparse Dense Mode
PIM Source Specific Multicast (PIM-SSM)
PIM Bidirectional Mode (Bidir-PIM)
What are PIM Control messages?
What is PIM Dense Mode?
The source floods the traffic out each interface from the source to the Dense Mode routers in the network.
The router stays quit and forwards the multicast traffic unless it doesn't have any receivers, then it will return a Prune message and the branch will be pruned of the Tree.
In this case the tree will be a source tree.
What is PIM Sparse Mode?
In essence this can create two trees, a Source Tree between the Source and the RP and a Shared Tree between the Receiver and the RP.
In PIM-SM a router has a default DR Priority Value. What is this value and what is it used for?
It is used to select a Designated Router in the case of Multiple PIM-SM routers on the same LAN segment.
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