How Does The Distance Vector Multicast Routing Protocol Work?
The distance vector multicast routing protocol or the DVMRP is a source based routing protocol. It is an extension of the protocol, the distance vector routing protocol used in unicast routing protocol. DVMRP follows the same strategy followed by the distance vector routing in which no router knows the complete route for a particular destination; actually there is no predefined route. Each router knows from which port to send out a unicast packet based on destination address. The route is made gradually and each router contributes to the formation of the route when it receives the packet. In DVMRP, the optimal tree is not predefined actually. No router knows which should be an optimal tree. The tree is made slowly and gradually. When a router receives a packet, the router forwards his packet through some of the ports, based on the source address, and also contributes to the formation of the tree. The rest of the tree is made by some other down-stream routers. This protocol must have to
