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Multiple arrows represent the multiple paths to the source or receivers. RPF is used in conjunction with the MDT to verify that multicast traffic is received on interfaces that are part of the tree. IF multicast traffic is received on an interface not part of the tree the traffic is disregarded.<br />
<br />
harbor235 ;}<br />

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Multiple arrows represent the multiple paths to the source or receivers. RPF is used in conjunction with the MDT to verify that multicast traffic is received on interfaces that are part of the tree. IF multicast traffic is received on an interface not part of the tree the traffic is disregarded.

harbor235 ;}


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I'm sorry, &nbsp;by multiple arrows what i was referring to are that there are two arrows in the diagram for a single link. and this has two costs. i do not understand how to use that for the calculation..
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I'm sorry,  by multiple arrows what i was referring to are that there are two arrows in the diagram for a single link. and this has two costs. i do not understand how to use that for the calculation..

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not exactly what i was looking for. but it helped.
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not exactly what i was looking for. but it helped.

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I'm trying to understand how RPF is used in DMVRP. Can someone please tell me an easy to understand procedure to calculate the source based tree for the provided diagram? the problem is that i cannot understand why there are 2 arrows from each node to the other.<br />
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the source router is A and the multicast receivers are E G H<br />
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<a href="https://filedb.experts-exchange.com/incoming/2010/04_w18/299709/calc.GIF" target="_blank" class="file-inline" title="the tree i calculated (12 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>calc.GIF</a><br />
<a href="https://filedb.experts-exchange.com/incoming/2010/04_w18/299710/dmvrp.GIF" target="_blank" class="file-inline" title="original graph (5 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>dmvrp.GIF</a>
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calc.GIF

dmvrp.GIF

I'm trying to understand how RPF is used in DMVRP. Can someone please tell me an easy to understand procedure to calculate the source based tree for the provided diagram? the problem is that i cannot understand why there are 2 arrows from each node to the other.

the source router is A and the multicast receivers are E G H



Distance Vector Multipath Routing Protoocol and RPF

Network design and methodology, also known as network architecture, is the design of a communication network. It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as data formats used in its operation. In telecommunication, the specification of a network architecture may also include a detailed description of products and services delivered via a communications network, as well as detailed rate and billing structures under which services are compensated.

Network Architecture

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.