Comparison and Analysis of PIM DM and BST Multicasting Network over Drop Tail Queuing Technology

The paper contrast a Multicasting network using PIM-DM (Protocol Independent Multicast Dense Mode) with BST (BiDirectional Shared Tree) protocol using NS2. The networking topology is well analyzed for two sources and drop of data packet and throughput is recorded and drawn. The simulation results mark the decrease in drop out packets for BST by 55.88235% on node 0 and some increase in drop out packets at node 1.

In 1990, Deering proposed IP multicast – an extension to the IP unicast service model for efficient multipoint communication [1]. It is a stateful service in that it requires routers to maintain State for forwarding multicast data toward receivers. It is a widely used service in today’s computer networking system; it is mostly used in Streaming media, Internet television, video conferencing and net meeting etc. Routers involved in multicasting packets need a better management over stacking system of packets to be broadcasted. Quality of service (QOS) is dependent on the queuing algorithm used in the multicasting system. A PIM Domain is a contiguous set of routers that all implement PIM and are configured to operate within a common boundary defined by PIM Multicast Border Routers (PMBRs) [2]. It uses the idea that an actual delivery path to a node is the reverse of the path from the receiving node. Bi-directional delivery tree are built with CFR information towards the core [3]. In Shared Tree multicast routing, the tree is rooted at Rendezvous Point (RP). All the traffic is forwarded towards source and root (RP). The queuing algorithm used is Drop Tail. Drop Tail object, which implements First in First out (FIFO) scheduling and drop-on-overflow buffer management typical of most present day Internet routers
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