Engineering Clinic

This post shows how to install ns 3.34 in Ubuntu 20.04 LTS Prerequisites: Fresh installation of Ubuntu Version 20.04 LTS  ns3.34 can be downloaded from here Follow the video link for complete step by step instructions on the installation.  This version fixes the compilation issues of vanet-routing-compare.cc (bug in ns3.33)  Issue the following commands after opening a terminal  $ sudo apt update $ sudo apt install g++ python3 python3-dev python-dev pkg-config sqlite3 python3-setuptools git qt5-default 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 openmpi-bin openmpi-common openmpi-doc libopenmpi-dev tcpdump wireshark libxml2 libxml2-dev Unzip or untar the ns-allinone-3.34.tar.bz2 in the home folder (in my case its /home/pradeepkumar) $ cd ns-allinone-3.34/ $ ./build.py --enable-examples --enable-tests  Once the installation is completed, you may get an output show

In network simulator 3, while simulating the vanet-routing-compare.cc file, you may get an error in ns-3.33 version as shown below: msg="GlobalValue name=VRCcumulativeBsmCaptureStart: input value is not a string",  file=../src/core/model/global-value.cc, line=128 terminate called without an active exception Command ['/home/ns3/Desktop/ns-allinone-3.33/ns-3.33/build/scratch/vanet-routing-compare'] terminated with signal SIGIOT. Run it under a debugger to get more information (./waf --run <program> --gdb"). To overcome this error, here is the patch to download https://github.com/tspradeepkumar/ns3/blob/main/vanet.patch Once downloaded, move this file to  ~ns-3.33/scratch/ folder and copy the vanet-routing-compare.cc also to the scratch/ folder and apply the following command  $ cd ns-allinone-3.33/ns-3.33/scratch $ patch -p0 < vanet.patch vanet-routing-compare.cc  Check the following video for explanation of vanet-routing-compare.cc and its characteristics

This post shows you Simple MQTT Application using Node JS. There are three parts of the application. For running any MQTT application, we need a  1. Broker (The broker can be anywhere in the Internet or cloud or a local machine)  2. Publisher (pub.js is the name of the file) 3. Subscriber (sub.js is the name of the file) Check the following video for complete instructions. In this example, we will be using a broker called https://www.hivemq.com To use the cloud broker ( mqtt://broker.hivemq.com) and connect the publisher and subscriber with a topic and a message. To install the Hive MQ software in your local machine (127.0.0.1) and run the same above code locally and make the connectivity between the pub-sub. We open two new .js files called pub.js (publisher) and sub.js (subscriber) in Visual Studio Code. To install the mqtt module in NodeJS, we use the command “ npm install mqtt ” in C:/ terminal.  We define our client as connecting to “mqtt://broker.hivemq.com”. We connect to th

This post shows how to install ns-3.33 in Windows 10 through WSL (Windows Subsystem for Linux) This posts works for Windows 11 also (I have tested it on a Windows 11 ISO and it works the Same way as mentioned in the following post.) This post will work for ns-3.3x version. Prerequisites : Install Windows Subsystem for Linux with GUI: Please refer the following video  System Information: OS used: Windows 10 and WSL (Ubuntu 20.04) GUI: XServer for Windows NS3 Version: ns-3.33 See the following complete video on how to install ns3 in Windows 10 Step 0 : Open XLaunch Step 1 :  Open WSL using PowerShell and open it as Administrator Command:/  wsl $ xfce4-session The GUI of Ubuntu Opens within Windows 10 OS. Step 2 : Download ns3 from nsnam.org website through Mozilla Firefox browser Step 3: Open a Terminal  $ sudo apt update $ sudo apt install build-essential autoconf automake libxmu-dev python3-pygraphviz cvs mercurial bzr git cmake p7zip-full python3-matplotlib python-tk python3-dev qt5-q

This post shows you how to install Windows Subsystem for Linux (WSL) in windows 10 operating system.  Requirements: Windows 10 OS or Preview Release version of Windows 10. Refer the complete video below on how to install WSL in Windows 10 including how to use Full Linux GUI using XServer for Windows, Follow the video for more details on how to do this process: Installing WSL There are multiple steps involved as given below Step 1: Open Windows Power Shell from the Start Menu with Administrative Privileges and execute the following commands  Command prompt:/>   dism.exe /online / enable-feature /featurename: Microsoft-Windows - Subsystem-Linux /all /norestart Command prompt:/>   dism.exe /online / enable-feature /featurename:VirtualMachinePlatform /all /norestart Step 2: Restart your computer (This step is mandatory)  Step 3: Download the Linux Kernel Update package for x64 Machine  https://wslstorestorage.blob.core.windows.net/wslblob/wsl_update_x64.msi Double click the abov

BonnMotion is a tool that generates scenario for ns2, ns3, qualnet, etc. This will comfortably work with Linux. And in windows, there could be some bugs. Please refer the documentation here: h ttp://sys.cs.uos.de/bonnmotion/doc/BonnMotion_Docu.pdf To use this tool for ns2, here are the steps. Step1 : Download the BonnMotion tool from this website Step 2: Unzip it to home folder (/home/pradeepkumar in my case) step 3: Here are the commands to install $] unzip -d bonnmotion-2.1.3.zip $] cd bonnmotion-2.1.3/ $] ./install  The above command will install, if any packages are missing for dependencies, please install it. $] Once installed, copy the bonnmotion-2.1.3/bin/bm file to /usr/bin/ for running it anywhere. if not go to bin folder using the command given below $] cd bonnmotion-2.1.3/bin/ To run BonnMotion $bonnmotion-2.1.3/bin] ./bm -hm  (this will list all the models) $bonnmotion-2.1.3/bin] ./bm -hm RandomWaypoint Will display all the parameters for RandomWaypoi

Link state routing in ns3 There are two varieties of protocols that deals with wired networks namely distance vector routing and link state routing,  As per the wikipedia, Distance-vector routing protocols , which work by having each node share its routing table with its neighbours, in a link-state protocol the only information passed between nodes is  connectivity related . Link-state algorithms are sometimes characterized informally as each router, "telling the world about its neighbors. This exercise can be one of the lab exercises of many universities in India. There are many more exercises to follow. If one understand this video, they can able to simulate any network design and run it successfully in ns3. In this blog post, I am not going to explain the concepts of link state routing, but will explain how to configure the nodes to use link state routing in ns3.  Please find the video for the source code explanation and compilation in ns3 on link state routing protocol Here is