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The RPF technique to prevent multicast routing loops depends
on the available IP routing information contained in the router. As
stated earlier, the router can use static routes, default routes, or
dynamic routing information to build the routing table. A dynamic
routing protocol is almost always preferred and DVMRP is no
exception. DVMRP utilizes its own dynamic routing protocol for route
exchange and routing table construction. The routing protocol used
by DVMRP is based on the Routing Information Protocol (RIP), so we will review RIP to gain
an understanding of the mechanisms involved and the problems that
can occur with a distance vector routing protocol. |
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