Installing ns-2 and ns-3 on Fedora Linux

ns is a discrete-event network simulator targeted primarily for research and educational use. There are two version of ns, ns-2 and ns-3, which are quite different with each other in the implementation and method to use them. In this post, we introduce how to install ns-2 and ns-3 on Fedora Linux 15.

Install ns-2.34 on Fedora

Download the allinone package

$ wget

Uncompress the pacakge

$ tar xf ns-allinone-2.34.tar.gz

Install needed pacakges

# yum install gcc make libX11-devel libXt-devel libXmu-devel

Ns-2 requires older version of gcc. So we install gcc-34 and gcc-34-c++ for it

# yum install compat-gcc-34 compat-gcc-34-c++

Install the allinon package of ns-2. During the install process, specify the CXX compiler we use

$ cd ns-allinone-2.34
$ CXX=g++34 ./install

Configure the environmental variables for ns-2 and nam, and add the executables to the PATH so that we can use ns and nam directly.

Add to ~/.bashrc if you use bash

export PATH


Add to ~/.cshrc_user if you use c shell

setenv NS_HOME "/full/path/to/ns-allinone-2.34"
setenv PATH "${PATH}:${NS_HOME}/bin:${NS_HOME}/tcl8.4.18/unix:${NS_HOME}/tk8.4.18/unix"
setenv LD_LIBRARY_PATH "${NS_HOME}/otcl-1.13:${NS_HOME}/ns-2.34/lib:/usr/local/lib"
setenv TCL_LIBRARY "${NS_HOME}/tcl8.4.18/library"

The installation is done by this step. Open another shell and try our installation:

$ nam


$ ns

Install ns-3.12.1 on Fedora

Install needed packages

# yum install libxml2 libxml2-devel gcc gcc-c++ make automake 
autoconf binutils openssh-server openssh-clients openssl python 
python-devel mercurial bzr scons flex bison tcpdump valgrind gdb

Download the allinone pacakge for ns-3

$ mkdir tarballs
$ cd tarballs
$ wget
$ tar xjf ns-allinone-3.12.1.tar.bz2

Build ns-3

$ cd ns-allinone-3.12.1/
$ ./

We will now interact directly with Waf in the ns-3.12.1 directory

$ cd ns-3.12.1

Configuration with Waf

$ ./waf -d optimized configure --enable-examples; ./waf

Validate our installation by running one example

$ ./waf shell
$ cd build/optimized/examples/
$ udp/udp-echo

Use tcpdump to display the simulation result

$ tcpdump -tt -r udp-echo-0-1.pcap

Eric Zhiqiang Ma

Eric is interested in building high-performance and scalable distributed systems and related technologies. The views or opinions expressed here are solely Eric's own and do not necessarily represent those of any third parties.


  1. Thanks for your tuorial :)
    I got a problem… I cannot find this path build/optimized/examples/
    Any suggestions on how to run udp-echo example ?

    thanks a lot!

  2. Install ns-allinone-2.35 in fedora 18
    NS2 stands for network simulator and it is not in fedora repository but it’s allinone package is available on isi.edurecently ns-2.35 RC7 is there with updated tcl and tk library but still it is not support gcc-4.5 series (does not like the X:() construct) so i made 2 patches.

    After apply those patches you can follow below steps.

    Installation of NS-2.35
    Open Terminal, Give the following command one by one
    su (press enter and enter your root or super user password)
    yum groupinstall “X Software Tools” {development software tools}
    exit (to come out of root user mode)
    Once installed, download the NS-2.35 allinone software from the following link.
    Copy that file to /home/pradeep (This is my home folder)
    Open terminal again and execute the following commands one by one
    tar zxvf ns-allinone-2.35.tar.gz
    cd ns-allinone-2.35

    Install Dependences : 
    yum install autoconf
    yum install automake
    yum install gcc-c++
    yum install libX11-devel
    yum install xorg-x11-proto-devel
    yum install libXt-devel
    yum install libXmu-devel

    Build ns-allinone-2.35 
    Go to you download directory and extract package (tar -xvf tarball), go to extracted directory and run

    You may possibly get one error during your installation is linkstate/ls.h error
    If you get the above error, open the file (~ns-2.35/linkstate/ls.h) using gedit or any text editor
    Go to line number 137 and change this line (void eraseAll() { erase(baseMap::begin(), baseMap::end()); })  to
    void eraseAll() { this->erase(baseMap::begin(), baseMap::end()); }
    again you try the command ./install and this time the installation will be successful.
    Once installed the PATH information will be provided to you.
    Copy the PATH and LD_LIBRARY_PATH Variable to /home/madhurpremg/NS2/nsallinone-2.35/.bash_profile (see a dot in the beginning)
    Input the path information in .bash_profile file like this
    export PATH=$PATH: {don’t put}
    Once done, save the file and close
    execute the command
    source .bash_profile
    try ns or nam to see whether your installation succeeded.

    Add PATH in .bashrc
    vim ~/.bashrc
    Add the following lines to the end of it. Remember replace “/opt/” by your installation path like “/home/username”. And accordingly also change the version numbers. This is for ns 2.35.



    # PATH

    Let it take effect immediately

    source ~/.bashrc

    Note: the step described above is important; otherwise, you cannot run ns successfully.
    or you can restart your X windows.i.e. logout and then login, or reboot your system, to make it work.)

    Now, the installation has been completed. If you try:
    $ ns

    Then a “%” will appear on the screen.type “exit” to quit the mode and back to “$
    Validate ns-2.35 
    Go to ns-2.35 directory and run
    #./validate (take almost 1 hour so keep patience)

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