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Home : Cisco Multicast Routing and Switching : Source-Based Multicast Trees

Source-Based Multicast Trees

Nov 11,2010 by admin

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Source-Based Multicast Trees  
  The routing table that is constructed using DVMRP route exchange produces multicast delivery trees that are source-based. The term “source-based” simply means that forwarding paths are based on the shortest path back to the source (remember RPF?). Therefore, for every multicast source, there is a corresponding multicast tree that connects the sender to all receivers through the RPF interface. For example, the network in Figures 5-24a and 5-24b contains two multicast sources. It is not important which multicast address the sources are sending packets to, only the location of the sources when constructing the delivery tree.

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