Ant Corse Work
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Transcript of Ant Corse Work
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Advance Network Technology
Analyzing Switched Ethernet Using OPNET
CONTENTS:
1. Introduction
2. Traffic details of the network.
3. Simulation and Results
4. Characteristics and tables
5. Justification
6. Conclusion
7. References
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Introduction:
OPNET is a network simulation tool which stands for Optimized Network
Engineering Tools. It is not only a network application tool that is used to
design a simulation network but also manages the network tools. OPNET
comes with some of the toolsets listed below
1. Protocols defined in packet format2. Network topology and link connections defined by project window.
3. Interface of a network component specified by node model.
OPNET is a simulator that is built on top of
every discrete event system. The system behavior is simulated by modeling
each and every event that is happening in the system and processed by user
defined system. To organize all the models to be built in the network it uses
hierarchy models. This software is mainly used to test and design the
performance of network characteristics, db entry, ftp, db query, accounts ,
Ethernet , average response time etc where we have the capability of
changing the predefined networks and edit the attributes. OPNET controls
the traffic by modeling network and application users. Now let us consider a
company network where I am going to describe my course work in detail. In
this company network we will be having mainly two blocks Profile
definitions and Application definitions. In Profile definitions we are going to
describe about the users. There are several types of applications that are
predefined in the Application definition block.
In this course work we need to initiate andsimulate an office network and check the network performances of the
servers. This network consists of four switches, of which one switch is used
as central switched and remaining three switches 1; switch 2 and switch 3
are located in different rooms. These switches S1, S2, S3 are connected with
100Base T links. These three switches are then in turn connected to server
with 10BaseT links. The first switch S1 is now connected to development
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2. In the second scenario, only one client application will be supported by
each server and runs on the local machines and the staff will have access to
only that server of that particular department.
3. In the Third scenario we need to remind the first scenario case and do the
same process by adding additional networks to the given network. We are
adding additional networks as these applications use 10Base T links and
100BaseT links. And the process is same as equal to first scenario i.e. (1=3).
4. In the last fourth scenario, we do repeat the process same as second
scenario, again by adding additional networks as we have done in third
scenario. The process is again same as second case i.e. (2=4).
In our company network, all servers will support all client applications.
Hence we need to edit and design the attributes of those applications. Here
we have to add 6 new applications in the application definition and name
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them as receptionist, human resources, accounting, sales, recruiting and
development. For each application we need to provide with valid start time
and end time.
From the above we can notice that all staff in
the network starts the work at different timings. Here I assumed that all the
staff of the company starts the work 1 hr earlier to their start time i.e. for
receptionist they start at 7 am. Sales staffs are going to leave the office late
as they work till 8pm. So the average duration of time they work is 12 hrs,
but we assumed that the office starts running from 7 am, so the average
working duration of the network is 13hours. We can see this, we run the
program and is shown below.
For each profile we have to assign applications. We can
do this by assigning attributes to every profile. For example, by selecting an
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RESULTS:
Thus from the above discussion, we can analyze the performance
characteristics of all the four scenario simulations. Comparisons have been
made for each selected parameters and their corresponding results are
known. All these parameters are listed in the given table below, to make the
comparison easy between the scenarios. With the help of these parameters
the performance of the network can be made easy.
As we have created six applications, we are going to compare
the parameters for the four scenarios.
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Global Characteristics:
1. Db Entry:
Parameter Scenario1 Scenario2 Scenario3 Scenario4
Response time
(sec)
0.026576 0.015767 0.042650 0.015462
Traffic
received(Bytes/sec
)
5986.284 6128.342 17563.27 3726.437
Traffic
received( Packets/s
ec)
0.549242 0.534532 0.781624 0.345345
Traffic
sent( Bytes/sec)
5986.284 6128.342 17563.27 3726.437
Traffic
sent(Packets/sec)
0.549242 0.534532 0.781624 0.345345
Graph:
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Db Query:
Parameter Scenario1 Scenario2 Scenario3 Scenario4
Response time
(sec)
0.026865 0.015345 0.276384 0.015875
Traffic
received(Bytes/sec)
6023.192 6452.043 9876.276 3778.284
Traffic
received( Packets/s
ec)
0.543484 0.534532 0.776353 0.352895
Trafficsent( Bytes/sec)
6023.192 6452.043 9876.276 3778.284
Traffic
sent(Packets/sec)
0.127363 0.1498547 0.867363 0.773463
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Parameter Scenario1 Scenario2 Scenario3 Scenario4
Object Response
time (sec)
0.00673 0.00635 0.0046372 0.001254
Page Response
time Sec
0.008763 0.002361 0.0126734 0.002732
Traffic
received( Bytes/sec
)
520.3428 420.0938 490.5673 409.4326
Traffic
Received( Packets/
sec)
0.67382 0.47262 0.590363 0.398723
Traffic sent(Bytes
/sec)
Traffic
sent(Packets/sec)
520.3428
0.673532
420.0938
0.467292
490.5673
0.62539
409.4326
0.438272
Print:
Parameter Scenario1 Scenario2 Scenario3 Scenario4
Traffic
received(Bytes/sec)
375.4532 178.0392 367.9182 189.3723
Traffic
received( Packets/s
ec)
0.067362 0.023637 0.078367 0.037465
Traffic
sent( Bytes/sec)
375.1429 178.0392 373.6473 189.3723
Traffic
sent(Packets/sec)
0.067362 0.023637 0.078367 0.037465
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Graph:
Justification:
Let Us review and justify our observations and descriptions.
In the given company network, we will not make any changes or
modifications in the application definition as they already have well
predefined applications. Only in Profile definitions we have to change the
applications in each and every profile. Only the client has access and
performs same applications in all the scenarios. Hence we have created six
profiles in all the scenarios.
In the first scenario, at every server we should select All
for supported services, as they support all the applications. All the
applications must me mentioned at every server in the second scenario.
Profile name also must me mentioned at each and every node.
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And the same process should be repeated for second and
third scenarios and back ground traffic of 10Baset links and 100Base T links
should be added to the network.
Hence, finally the duration of the simulation time must be 13hrs as the
network runs from morning 7 am to 8 pm. Thus the network performance
can be found with the help of these profiles and applications.
Conclusion:
I am going to conclude my calculations and observations
made in this course work. This helped me a lot in order to know the
simulation tools being used in present technologies. With the help of this
back ground load we will be able to distinguish the difference in the
network. On the other hand, they will be so many negative factors affecting
the performances of the network while we run the network.
In order to rectify and analyze these problems, we
must provide better network and different scenarios. If we do the first
scenario perfectly, I think we can do remaining scenarios perfectly according
to my observations and calculations I made this conclusion.
Reference:
1. Teach Mat
2. www.opnet.com
3.
https://cms1.gre.ac.uk/teachmat0809/COMP1266/course/schedule.asp?
banner=COMP1266
http://www.opnet.com/https://cms1.gre.ac.uk/teachmat0809/COMP1266/course/schedule.asp?banner=COMP1266https://cms1.gre.ac.uk/teachmat0809/COMP1266/course/schedule.asp?banner=COMP1266http://www.opnet.com/https://cms1.gre.ac.uk/teachmat0809/COMP1266/course/schedule.asp?banner=COMP1266https://cms1.gre.ac.uk/teachmat0809/COMP1266/course/schedule.asp?banner=COMP1266