Computer Networks: OSPF Routing Protocol Configuration & Renewal

This assignment solution details the configuration of the Open Shortest Path First (OSPF) routing protocol across a network of eight routers. It includes the routing tables for each router, demonstrating how OSPF is used to determine the shortest paths for data transmission. The solution also addresses the process of renewing the routing table after a router failure, specifically focusing on router 6, and how OSPF facilitates the restoration of network configurations. The document references relevant academic sources to support the explanation of OSPF's functionality and its role in optimizing network performance. Desklib provides access to this and other solved assignments.

Running Head: COMPUTER NETWORKS AND INTERNET 1
Computer Networks and Internet
Institution
Name
Date

COMPUTER NETWORKS AND INTERNET 2
Question 1
Network Topology with 8 Routers configured to implement the OSPF algorithm
Routing Tables for Router 1, Router 2, up to Router 8.
Router 1 (Routing Table).
IP address Router 1: 192.168.1.1
Subnet: 255.255.255.0
Serial 0/0/0 port status ON, IP 10.0.0.1, Subnet 255.0.0.0
Workstation: IP 192.168.1.1
Workstation’s subnet Mask: 255.255.255.0
Default gateway: 192.168.2.1 (Rodriguez, 2016)

COMPUTER NETWORKS AND INTERNET 3
Router 2 (Routing Table).
IP address Router: 192.168.2.1
Subnet for router: 255.255.255.0
Workstation: IP 192.168.2.2, Subnet Mask: 255.255.255.0, Default gateway: 192.168.2.1
Serial 0/0/0 port status ON, IP 11.0.0.1 255.0.0.0
Serial 0/0/1 port status ON, IP 11.0.0.2 255.0.0.0
Router 3 (Routing Table).
IP address Router: 192.168.3.1
Subnet for router: 255.255.255.0
Workstation IP 192.168.3.2
Workstation’s Subnet Mask: 255.255.255.0
Default gateway: 192.168.3.1
Serial 0/0/0 port status ON, IP 12.0.0.1, Subnet Mask 255.0.0.0
Serial 0/0/1 port status ON: IP 12.0.0.2, Subnet: 255.0.0.0

COMPUTER NETWORKS AND INTERNET 4
Router 4 (Routing Table).
Router IP: 192.168.4.1
Router subnet: 255.255.255.0
Serial 0/0/0 port status ON, IP 13.0.0.1 subnet 255.0.0.0
Serial 0/0/1 port status ON, IP 13.0.0.2 subnet 255.0.0.0
Workstation: IP 192.168.4.2
Subnet Mask for workstations: 255.255.255.0
Default gateway: 192.168.4.1
Router 5 (Routing Table).
Router IP: 192.168.5.1
Subnet for router: 255.255.255.0
Serial 0/0/0 port status ON IP 14.0.0.1, Subnet: 255.0.0.0
Serial 0/0/1 port status ON IP 14.0.0.2, Subnet: 255.0.0.0
Workstation: IP 192.168.5.2 Subnet Mask: 255.255.255.0
Default gateway: 192.168.5.1

COMPUTER NETWORKS AND INTERNET 5
Router 6 (Routing Table).
Router IP: 192.168.6.1
Subnet for router: 255.255.255.0
Serial 0/0/0 port status ON IP 15.0.0.1 255.0.0.0
Serial 0/0/1 port status ON IP 15.0.0.2 255.0.0.0
Workstation: IP 192.168.6.2
Subnet Mask for workstations: 255.255.255.0
Default gateway: 192.168.6.1
Router 7 (Routing Table).
Router IP: 192.168.7.1
Router subnet: 255.255.255.0
Serial 0/0/0 port status ON IP 16.0.0.1 Subnet 255.0.0.0
Serial 0/0/1 port status ON IP 16.0.0.2 Subnet 255.0.0.0
Workstation: IP 192.168.7.2
Subnet Mask for workstation: 255.255.255.0
Default gateway: 192.168.7.1

COMPUTER NETWORKS AND INTERNET 6
Router 8 (Routing Table).
Router Ip: 192.168.8.1
Subnet for router: 255.255.255.0
Serial 0/0/0 port status ON IP 17.0.0.1 Subnet mask: 255.0.0.0
Workstation: IP 192.168.8.2
Subnet Mask for workstations: 255.255.255.0
Default gateway: 192.168.8.1
Question 2
Renewing the Routing Table Using OSPF
The Open Shortest Path First (OSPF) is a technique used to find the shortest path from
one router to another in any network (Medhi, 2107). When there is a larger LAN, OSPF will
create a typography of all the router connections. In the event that data is sent from different
locations, the OSPF algorithm will evaluate all the available routes and decides on the most
suitable and efficient route to send data. This, therefore, will get rid of unnecessary delays during
transmission of data. When a router is disabled in a network that utilizes the Open Shortest Path
First algorithm, it is simple to later renew the routing table since the OSPF algorithm always
keeps a routing table or a typography as aforementioned. It will thus have the previous
configurations of all disabled routers and will be simpler to restore those past router
configurations.
If router 6 is disabled, a copy of all of its IP configurations will be kept by the OSPF
algorithm. The normal transfer of data among the remaining seven routers will not be interfered

COMPUTER NETWORKS AND INTERNET 7
with. When router 6 is enabled, it will be set with its earlier configurations only if a different
router has not been deployed with the same IP configurations as the disabled router (Ligayizi et
al., 2015).
Disabling Router 6
Switching router 6 off / Disabling

COMPUTER NETWORKS AND INTERNET 8
Enabling Router 6 again.
Initial routing table is renewed by OSFP

COMPUTER NETWORKS AND INTERNET 9
References:
Medhi, D., & Ramasamy, K. (2017).
Network routing: algorithms, protocols, and architectures.
Morgan Kaufmann.
Lugayizi, F. L., Gasela, N., & Michael, E. B. (2015). Performance Evaluation of OSPF and
EIGRP Routing Protocols for Video Streaming over Next Generation
Networks.
Advances in Computer Science: an International Journal,
4(5), 29-35.
Rodriguez, F. J., Fernandez, S., Sanz, I., Moranchel, M., & Bueno, E. J. (2016). Distributed
Approach for SmartGrids Reconfiguration based on the OSPF routing protocol.
IEEE
Transactions on Industrial Informatics,
12(2), 864-871.