Abstract: A Communication Network consists of many interconnected nodes, sharing resources linked through communication channels. Routers, switches and other network elements are placed at the nodes, carrying out communication as per certain protocols applied on the network. The packets or frames are guided to their destination through the shortest path as defined by these protocols configured on the network. In this paper, we have considered a network consisting of routers placed at the nodes, linked by serial interfaces. OSPF is configured on the network for the packets to reach the destination through the shortest path. Open Shortest Path First (OSPF) is a dynamic and classless routing protocol. We have used Variable Length Subnet Masking (VLSM), during IP addressing in the network. The network is password protected and encrypted. Any router can be remotely accessed using Telnet. We have used GNS 3 to build the situation and solve the problem. In this paper we also illustrate the setting of CTY, TTY, AUX and VTY password, create interface loopbacks to test the advertisement by OSPF routing protocol configured on each router and other aspects of OSPF routing protocol. Enhanced Interior Gateway Routing Protocol (EIGRP) is another dynamic routing protocol which can guide the packets to their intended destination, choosing the shortest path. Technical difference between EIGRP and OSPF is well highlighted in this paper with a live example/ problem statement.

Keywords: Open Shortest Path First (OSPF) Routing Protocol, CTY, TTY, AUX and VTY, Password Protected, VLSM (Variable Length Subnet Masking), Encrypted, Enhanced Interior Gateway Routing Protocol (EIGRP)

PDF | DOI: 10.17148/IJARCCE.2019.8703

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