Network Design, Traffic Modeling, and Performance Analysis Project

This project focuses on designing and analyzing a network for a college organization using the OPNET simulation tool. The design utilizes a star topology with three subnetworks for engineering, research, and administration departments. The assignment details the configuration of routers, node specifications, and traffic modeling, including application profiles for HTTP, FTP, database, and email traffic. Network performance is investigated by analyzing Ethernet delay and application response times, with simulation graphs illustrating the impact of varying traffic intensities. The project provides a comprehensive overview of network design principles, traffic modeling, and performance analysis, demonstrating how to use OPNET to evaluate network behavior and optimize performance. The project includes detailed descriptions of HTTP, FTP, database, and email protocols, and the conclusion summarizes the design, simulation, and analysis processes.

Networking Technologies

Table of Contents
1. Introduction...................................................................................................................................2
Part-A.....................................................................................................................................................2
2. Network design..............................................................................................................................2
Part-B...................................................................................................................................................11
3. Network Traffic Modelling.........................................................................................................11
Part-C...................................................................................................................................................16
4. Network performance and investigation....................................................................................16
5. Conclusion....................................................................................................................................28
References............................................................................................................................................28
Appendix –A............................................................................................................................................30

1. Introduction
The whole network will be designed at OPNET. The OPNET is one type of networking
simulation tool. It has many toolsets. The Packet format, Process model, Project window,
Simulation window and node model are the Toolsets of OPNET. The protocol used at the design
is defined by packet format. The simulation window is used for capturing and displaying the
results. The Process model defines the behavior of the network devices. The link connectivity
and Network Topology is defined by the Project window. The nodal model is used for defining
the interface for the network devices. The Network diagram will be designed for the college
organization. The selected organization will be appropriate for the network traffic. The star
topology will be used for designing the network. The network design will be tested. The
Network traffic will be determined with application traffic generated by every department. The
investigation will be done for analyzing the network performance that is affected by link
performance.
Part-A
2. Network design
The network is designed for medium sized company. Three departments such as engineering,
research and administration are designed with different number of users. Each department is
connected with individual router. This network is called as sub network. The three sub networks
are connected with router, which is known as core network. Several topologies are there in
networking design. The star topology is used for designing the required network in college. In
college, the network is needed for many purposes. The administration department in college used
the internet for providing the information of college in the daily updating. They update all the
events happen at the college including placements of college. The Engineering departments used
it for developing the knowledge, searching information related to corresponding subjects. Many
students got benefit of the internet in the college. The research department used it for researching
and innovating new things. The benefit of star topology is when one system in the topology get
failed which is not affect the any other system in the topology.

To design the network with three subnetworks. Here to develop the college organization with
three with three sub parts called Engineering, Research and Administration.
To choose the Application in order to set the application configuration

Profile for profile configuration

To set the engineer departments with 25 number of clients

To set the Researcher departments with 25 number of clients

To set the Administration departments with 25 number of clients

Set attributes for the Router1.
Set attributes for the Router2.

Set attributes for the Router3.
Node specifications and attributes
The Riverbed modeler permits users to switch the definition of conditions for its nodes by
hopeful the alteration of the node attributes. The features include the traffic generation
parameters includes the bit rate, packet size, and inter-arrival time and packet generation start
time and the Wireless Local Area Network MAC parameters (which includes the MAC address
of the node, the Channel settings, response power threshold and the control packet threshold).
For the multi-beam antenna broadcast, the bottleneck node wants to be cognizant of the
addresses of its response nodes. In order to integrate this capability, hence they can includes
multiple destination addresses as portion of our node model. As the number of destinations
increases, they model the usage of that numerous destination addresses in our nodes.

Part-B
3. Network Traffic Modelling
Types of traffic
The actual traffic
types used by each
group of users
Ethernet Delay – this
represents the end-to-
end delay of all
packets received by
all the stations.
Applications Frequency
It supports frequency
bandwidths of 800,
900, 1800 and 1900
MHz and new
frequency
bandwidths that range
from 800 MHz to
2.62 GHz.
Message Size
To configure the size
of the data message,
but the size of the
control message is
512 bytes, by default.
The effects of the
control messages are
more noticeable when
you are modeling the
transfer of small files,
but have less impact
on the results for a
large file transfers.
1. Traffic Received
(in packets/sec)
by the traffic
sinks across all
nodes
1. Database
application
2. Traffic Sent (in
packets/sec) by
the traffic sources
across all nodes.
2. File transfer
protocol

3. Client Http -
Traffic Received
(bytes/sec).
3. Hypertext
transfer protocol
4. Global Statistics -
DB Query -
Response Time
(sec).
5. Global Statistics -
HTTP -Page
Response Time
(seconds).
6. Client DB -
Traffic Received
(bytes/sec).