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33 Cards in this Set
- Front
- Back
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PIM
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Protocol independent multicast
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Define PIM
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Agnostic to the underlying unicast routing protocol being used
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Multicast traffic radiates from a source using a ________________
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distribution tree
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Two types of distribution trees
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Source based (shortest path trees (SPTs)
Shared tree |
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Shared tree - ___
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traffic is sent through a central core router call a rendezvous Point (RP)
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Notation used for Shared tree
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*,G
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Notation used for source based tree
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S,G
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PIM forwards traffic using the _____concept
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distribution tree
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S notation stands for
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class A B or C address and source of mutlicast traffic
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G notation stands for
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group address
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* notation stands for
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any particular source
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PIM Sparse mode uses a ______ join approach
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explicit
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PIM Spare mode supports ____ and ____
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SPT
Shared Trees (*,G) |
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PIM Dense mode has a ________behavior
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flood and prune
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PIM Dense mode has a ______ approach (S,G)
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Source-based (SPT)
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SPT stands for
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shortest path tree
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PIM ____ mode is the preferred mode
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Sparse
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PIM spare-dense mode was created to enable ________
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Auto-RP technology
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Auto-RP technology automatically distributes ____ information
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RP (rendezvous point)
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When multiple routers are connected to a multi-access network, one of them is elected as the _________
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Designated Router
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The ________ IP address wins the DR election
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highest
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The DR sends _______ messages to the RP
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Join/prune
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Bidirectional PIM is a variation on what PIM mode?
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PIM-SM
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What does Bidirectional PIM address?
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issues for groups with large numbers of sources
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The point of Bidirectional PIM is to
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eliminate source based SPT from your infrastructure
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All forwarding will be done by (*,G) mechanisms with ___________
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Bidirectional PIM
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Bidirectional PIM elects a ______
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Designated forwarder (DF)
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A designated forwarder keeps the technology ______ free
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loop
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A designated forwarder is responsible for forwarding the appropriate multicast traffic ________
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upstream
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The DF is elected using the best ______ route to the RP
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unicast
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Three possible options for using PIM sparse Mode with AUTO-RP
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Manual map of the RP for auto RP groups
use of the ip pim autorp listener command PIM Spare-Dense Mode |
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under AUTO-RP, what device teaches routers about the RP for certain groups
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mapping agent
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result of ip pim spt-threshold set to infinity
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method for forcing the use of shared trees
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