Skip to main content

NS2 Installation in Ubuntu 22.04

Telnet and FTP in Wired networks using NS2 (Network Simulator 2)

Telnet and FTP for a Wired Networks

This post tells about the use of Telnet and FTP in Network Simulator 2 for a wired network. This can be extended to a wireless network as well.

The following is the source code for implementing Telnet and FTP application in a Wired network scenario. 

The network looks like this:
Telnet in NS2

Node 0 to Node 2 is enabled with Telnet Application and Node 1 to Node 3 is enabled with FTP Application.  Save the following file as wired.tcl
#     Simulation parameters setup
set val(stop)   10.0  ;# time of simulation end

#        Initialization        
#Create a ns simulator
set ns [new Simulator]

#Open the NS trace file
set tracefile [open w]
$ns trace-all $tracefile

#Open the NAM trace file
set namfile [open out.nam w]
$ns namtrace-all $namfile

#        Nodes Definition        
#Create 5 nodes
set n0 [$ns node]
set n1 [$ns node]
set n2 [$ns node]
set n3 [$ns node]
set n4 [$ns node]

#        Links Definition        
#Createlinks between nodes
$ns duplex-link $n0 $n4 100.0Mb 10ms DropTail
$ns queue-limit $n0 $n4 50
$ns duplex-link $n1 $n4 100.0Mb 10ms DropTail
$ns queue-limit $n1 $n4 50
$ns duplex-link $n2 $n4 100.0Mb 10ms DropTail
$ns queue-limit $n2 $n4 50
$ns duplex-link $n3 $n4 100.0Mb 10ms DropTail
$ns queue-limit $n3 $n4 50
$ns duplex-link $n3 $n0 100.0Mb 10ms DropTail
$ns queue-limit $n3 $n0 50

#        Agents Definition        
#Setup a UDP connection
set tcp0 [new Agent/TCP]
$ns attach-agent $n0 $tcp0
set sink1 [new Agent/TCPSink]
$ns attach-agent $n2 $sink1
$ns connect $tcp0 $sink1

#Setup a UDP connection
set udp1 [new Agent/UDP]
$ns attach-agent $n1 $udp1
set null3 [new Agent/Null]
$ns attach-agent $n3 $null3
$ns connect $udp1 $null3
$udp1 set packetSize_ 1500

#        Applications Definition        
#Setup a FTP Application over TCP connection
set ftp1 [new Application/FTP]
$ftp1 attach-agent $tcp0
$ns at 1.0 "$ftp1 start"
$ns at 10.0 "$ftp1 stop"

#Setup a Telnet Application over UDP connection
set telnet0 [new Application/Telnet]
$telnet0 set interval_ 0.001
$telnet0 attach-agent $udp1
$ns at 1.0 "$telnet0 start"
$ns at 10.0 "$telnet0 stop"
#$ns at 10.0 "$cbr1 stop"
$telnet0 set type_ Telnet

#        Termination        
#Define a 'finish' procedure
proc finish {} {
    global ns tracefile namfile
    $ns flush-trace
    close $tracefile
    close $namfile
    exec nam out.nam &
    exit 0
$ns at $val(stop) "$ns nam-end-wireless $val(stop)"
$ns at $val(stop) "finish"
$ns at $val(stop) "puts \"done\" ; $ns halt"
$ns run

When you run the above file using the command 
$ ns wired.tcl 
and the output generated is out.nam and 
The packet transmission is shown like this in the animation window:
Telnet in NS2
Telnet in ns2

Node 0 to Node 2 is enabled with Telnet Application and Node 1 to Node 3 is enabled with FTP Application, which is shown in the above picture.
To get the throughput of the above file in bits per second, here is the awk script: 
Save the following in a file called telnet.awk  and store in the same place where the wired.tcl is also stored. 

pkttype= $5;
if(event == "r" &&pkttype == "udp" &&fromnode == "1.0" &&tonode == "3.0")
tcpSize1 = pktsize;
if(event == "r" &&pkttype == "tcp" &&fromnode == "0.0" &&tonode == "2.0")
tcpSize2 = pktsize;



throughputtcp1= totaltcp1/24; # because simulation time is 24.5   0.5 = 24
throughputtcp2= totaltcp2/24; # because simulation time is 24.5   0.5 = 24
printf("The Throughput of FTP application is %d \n", throughputtcp1);
printf("The Throughput of TELNET application is %d \n", throughputtcp2);
The above file can be run using the command:
$ gawk -f telnet.awk
The above command will print the following two lines which informs the throughput of using Telnet and FTP
The Throughput of FTP application is 8962000 
The Throughput of TELNET application is 3058293 


Popular posts from this blog

Installation of NS2 (ns-2.35) in Ubuntu 20.04

Installation of NS2 (ns-2.35) in Ubuntu 20.04 LTS Step 1: Install the basic libraries like      $] sudo apt install build-essential autoconf automake libxmu-dev Step 2: install gcc-4.8 and g++-4.8 open the file using sudo mode $] sudo nano /etc/apt/sources.list Include the following line deb bionic main universe $] sudo apt update $] sudo apt install gcc-4.8 g++-4.8 Step 3:  Unzip the ns2 packages to home folder $] tar zxvf ns-allinone-2.35.tar.gz $] cd ns-allinone-2.35/ns-2.35 Modify the following make files. ~ns-2.35/ Change @CC@ to gcc-4.8 change @CXX@ to g++-4.8 ~nam-1.15/ ~xgraph-12.2/ ~otcl-1.14/ Change in all places  @CC@ to gcc-4.8 @CPP@ or @CXX@ to g++-4.8 open the file: ~ns-2.35/linkstate/ls.h Change at the Line no 137  void eraseAll() { erase(baseMap::begin(), baseMap::end()); } to This void eraseAll() { this->erase(baseMap::begin(), baseMap::end()); } All changes made Step 4: Open a new termi

Installing ns3 in Ubuntu 22.04 | Complete Instructions

In this post, we are going to see how to install ns-3.36.1 in Ubuntu 22.04. You can follow the video for complete details Tools used in this simulation: NS3 version ns-3.36.1  OS Used: Ubuntu 22.04 LTS Installation of NS3 (ns-3.36.1) There are some changes in the ns3 installation procedure and the dependencies. So open a terminal and issue the following commands Step 1:  Prerequisites $ sudo apt update In the following packages, all the required dependencies are taken care and you can install all these packages for the complete use of ns3. $ sudo apt install g++ python3 python3-dev pkg-config sqlite3 cmake python3-setuptools git qtbase5-dev qtchooser qt5-qmake qtbase5-dev-tools gir1.2-goocanvas-2.0 python3-gi python3-gi-cairo python3-pygraphviz gir1.2-gtk-3.0 ipython3 openmpi-bin openmpi-common openmpi-doc libopenmpi-dev autoconf cvs bzr unrar gsl-bin libgsl-dev libgslcblas0 wireshark tcpdump sqlite sqlite3 libsqlite3-dev  libxml2 libxml2-dev libc6-dev libc6-dev-i386 libclang-dev llvm-

VPL Jail Server Installation | Virtual Programming Laboratory with Moodle

Virtual Programming Laboratory (VPL)  This post tells you how to install VPL Jail Server Installation in Ubuntu 20.04 and how to configure it using Moodle Learning Management System. VPL - Virtual Programming Laboratory  For full installation with complete description, follow the video What is VPL? VPL is Virtual Programming Laboratory which is a tool for programming assignments, evaluation and running of programs. The programming languages supported by VPL is C, C++, Java, Python, Perl, PHP, NodeJS, Verilog, etc. Step 1 - Install  VPN Jail Server Installation  My Server configuration  16GB RAM and 16 Core PRocessor (Intel Xeon)  Virtual Machine  Ubuntu 20.04 (64 bit OS). To download the softwares  Unzip or untar the above file in the home folder (in my case it is /home/tspradeepkumar/ ) $ cd vpl-jail-system-2.7.2/ $ sudo ./install-vpl-sh VPL Jail Server Installation This will take some time based on your internet connection: To Star