Lab window, enter following values: Initial Topology:-Create Empty Scenario

 

 

 

 

 

 

 

 

 

 

 

 

 

 

     Lab # 1 Introduction to Riverbe Modeler

 

 

 

Submitted by:Mili
Patel(200393275)

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Lab # 1 Introduction
to Riverbed Modeler

 

Objective:

To become familiar with the
riverbed Modeler to learn the basics of riverbed, network design and testing of
a local area network.

 

Riverbed Modeler Start Procedure:

®   
 Click on Start
Menu

®   
 Search
‘riverbed’

®   
Click on “Riverbed Modeler Academic Edition
17.5”

®   
Accept  the License agreement

®   
Main window for this software will open

Fig.
1 Riverbed Modeler Academic Edition 17.5

 

For  1 Hub and 5 Hosts

1.    
FileàNew.

2.    
In pop-up window select Project from drop down list and
click on OK.

3.    
Give Project  and
Scenario name.

4.    
Now in the next window, enter following values:

Initial Topology:-Create Empty
Scenario

Choose Network Scale: – select
office and Use Metric Units box

Specify Size:- 100m x 100m (default
size)

Technologies: Ethernet

Review: check values and click OK

5.    
TopologyàRapid
Configuration.

6.    
Select star and click OK.

 

 

 

Fig.
2

 

 

 

 

Selecting star topology for the 1
hub and 5 workstation:-

Fig
3

 

7.    
Enter following values in the specific field:

Center Node Model:
ethernet_16_hub

Periphery Node Model:
ethernet_wkstn

Link Model: 10BaseT

Number: 5

Center: X = 25, Y = 25

Radius: 20

                                       
                             Fig 4

 

 

                                               Fig 5 -1 hub 5 node using star topology

Editing of attributes:

 

                                                Fig
6-editing attribute1

 

 

                                                Fig
7-editing attribute2

 

Adding traffic to the network

 

Fig7-adding
traffic

 

Fig.
8-adding traffic 2

Fig9-adding
traffic  3

 

 

 

 

 

 

8.    
Now select one node and right click on it. Select Edit Attribute.
Set the values as shown in figure below.we have to do the same with all nodes
that are connected to the hub.

Fig.
10

 

9.    
Then click on in edit attributes  Find Application: Supported Services and
select All in value field. Click OK.

10.  Now,
collect statistics do as follows:

®   
Right click on Server and select ‘Choose
Individual DES Statistics’. Select check box in front of: Node StatisticsàEthernet-
Load (bits/sec),collision count and utilization and delay

®   
This give graphical representation of the load ,delay
.

                   Fig 11-to collect statistics
for the Ethernet delay

 

 

             Fig 12-to collect statistics of
collision count and utilization.

 

 

11.  run
the project. Put 10 in time Duration .

12.  To
View the result click on the hub or server for which the result is needed and click
on the check box of load ,delay and collision count. And click on show button.

 

 

 

Results:

For  1 Hub and 5 Hosts

Figure no.13 shows the Global Ethernet Delay, Ethernet
Load, Ethernet Collision and Utilization for hub connected with 5 nodes:

 

(a)

(b)

 

(c)

Fig.
13 (a,b,c) statistics of the network

 

Rationale behind the steps followed in “adding traffic to the network”

®   
These steps are used to configure a workstation .the
behavior of the user depends on the traffic so its change according the
traffic. How often application is being used by the user can be seen from the
profile.

 

 

Now replace the Switch with the hub

for 1 Switch and 5 Hosts

 

   

                                       Fig 14-
1 switch 5 hosts

 

Figure no.15 shows
the Global Ethernet Delay and  Ethernet
Load.here ,Switch connected with 5 nodes:

 

 

 

                                                           
(d)

 

 

 

 

                                   Fig 15-result
after replacing hub with switch

 

 

 

So after replacing hub with switch the change in graphs of
delay can be seen as it is less fluctuated than it connected with the hub .

Here switch eliminates the
collisions because switch are full duplex so there is no shared channels are
available .

 

 

 

 

 

  By increasing
number of host

For :- 1 Hub and 30 Hosts

 

                                                   
          Fig 16- 1 host 30 node

 

 

This software has limited
application for hub (no of 16)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

For  1 Switch and 30 Hosts

Figure no.17  represents  the Global Ethernet Delay and load.Here, Switch
connected with 30 nodes:

Fig.
17

 

 

Answers to the Questions:

 

Que 1-What are the
2 questions that you are trying to answer in this simulation and what
statistics are going to help you answer these questions?

 

Answer:-    In
this simulation we are trying to find the performance of the network.

The statics that are help to find
the performance of the network are  CPU
utilization,load and delay between all workstations. Database and email
server,VoIP server and collision count of the hub, these application comes in
CPU utilization.

 

Que 2- What is the average and peak server load? What is the average
network delay?

 

Answer: –

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

·       For 1: 1 hub, 5 workstations

Fig.
18  average server load

Fig 19-peak server load

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

·       For 2: 1 switch,5 workstations

 

 

                                  Fig 20-average server load for switch

 

                                           Fig 21-peak
server load for switch

 

 

 

 

 

 

 

 

 Que 3 – What is the difference in the average load on the server by adding the
new star network? Does this value make sense (look at the ratio of workstations
added to the network). What was the change in delay?

Answer:

The difference between the
avg. server load for a hub with 5 workstations and a hub with 30 workstations:

367036 – 113123 = 253913
bits/secs

Therefore, the ratio of
additional workstations = 30/5= 6.

So the difference between the avg.
Load makes sense as the number of workstations increased three time from the
initial topology, so it is expected that the avg. server load of the hub with
15 workstations will be three times the server load of a hub with 5
workstations.

By comparing average delay, we can
notice that there is minor difference in the delay.

Que 4 – What are the four steps in using the
riverbed Modeler?

Answer:

The Following four steps that we
are going to use in Riverbed model:

1.    
Create network model according to the application.

2.    
Choose the statistics

3.    
Then run the simulation

4.    
View the result and analyze it.

 

Que 5- What is the principal function of the
Project Editor?

Answer:

 The principal function of the project editor
is to build the network topology ,to allow of  editing the attributes ,adding the traffic in
the network  ,run simulation and view the
simulation result.

 

 

 

Que 6- What are the
types of Topologies available from the Rapid Configuration Wizard?

Answer:

®   
Bus

®   
Ring

®   
Star

®   
Tree

®   
Unconnected Network

®   
Mesh full

®   
Mesh randomiz

 

 

 

 

 

QUE 7: What
3 methods exist to create a Network topology?

Answer:

 

 

Following are the three methods are exist to create a network
topology:

·  Rapid configurations

·  Selecting nodes from the
object palette  and  links from object palette

·  Importing the topology.

 

 

QUE 8: From
the results obtained, what is the relationship between the delay, utilization
and the number of collisions?

Answer:

Delay create effect on both
number of collision and utilization .As delay increases, numbers of collision increase
and utilization decreases.

 

 

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