https://script.spoken-tutorial.org/index.php?action=history&feed=atom&title=Ns-3 2026-04-28T14:40:47Z Revision history for this page on the wiki MediaWiki 1.23.17 https://script.spoken-tutorial.org/index.php?title=Ns-3&diff=1530&oldid=prev 2012-12-11T12:38:57Z

<p>Created page with &#039;ns-3 (http://www.nsnam.org) is a discrete-event network simulator for Internet systems, targeted primarily for research and educational use. ns-3 is free software, licensed under…&#039;</p> <p><b>New page</b></p><div>ns-3 (http://www.nsnam.org) is a discrete-event network simulator for Internet systems, targeted primarily for research and educational use. ns-3 is free software, licensed under the GNU GPLv2 license, and is publicly available for research, development, and use. ns-3 is intended as an eventual replacement for the popular ns-2 simulator. The project has an active developer base and a vibrant community of networking researchers involved with it.<br /> <br /> Please note that ns-3 is _not_ an evolution of ns-2, and is a completely new simulator written from scratch. ns-3's source code is written in C++, whereas end users can develop their simulation scripts using C++ or Python. ns-3 works on Linux and Unix variants, OSX and Windows (via Cygwin).<br /> <br /> In the following tutorials, we will cover some of the important concepts that underly ns-3, and the basics of writing simulation scripts. Note that there are also a tonne of tutorials at http://www.nsnam.org/tutorials.html.<br /> <br /> == Version and OS ==<br /> <br /> For the tutorials, we will be using ns-3-dev. We recommend using a GNU/Linux variant or OSX for these tutorials.<br /> <br /> (Please see the associated text box of individual spoken tutorials on the website to decide the versions of software and OS to which it is applicable.)<br /> <br /> __TOC__<br /> <br /> == Description ==<br /> ns-3 allows one to perform network simulations, and thus aid in the testing and validation of network models. Simulations are important because they provide a platform to verify the working of a protocol before a real world implementation of the same can be experimented with.<br /> <br /> == Usage ==<br /> To run a simulation, a user writes a simulation script in either C++ or Python. The simulation script uses the models that are available and generates PCAP and/or ASCII traces. Users may use their own formats for extraction of data out of a simulation.<br /> <br /> == Prerequisites ==<br /> Users are expected to be familiar with C++ and be familiar with Computer Networks.<br /> <br /> == Contributors ==<br /> * Prof. M. S. Gaur, Department of Computer Engineering, Malaviya National Institute of Technology, Jaipur, India.<br /> * Lalith Suresh P., Department of Computer Science and Engineering, Instituto Superior Técnico, Lisbon, Portugal.<br /> <br /> <br /> == NS-3 Basic Tutorials ==<br /> <br /> === NS-3 Concepts and Installation ===<br /> This tutorial covers some important concepts of ns-3, and then proceeds to demonstrate an installation of the same.<br /> # Packets: Packet objects are units of information sent and received by applications.<br /> # Nodes: A Node class represents a network element in ns-3. Just like in a real network node, it may _optionally_ have an Ipv4 stack, one or more routing protocols, a mobility model or applications running on top of it.<br /> # Applications: Applications are traffic generators, which generate streams of data as per user defined intervals/bursts. They are highly configurable. A well known kind of application that ns-3 offers is 'ping'.<br /> # NetDevices: NetDevice objects represent real world network interfaces in ns-3. Presently, ns-3 allows users to use Csma, Wifi, Point-to-point, Wimax, Mesh and many more with their simulation nodes.<br /> # Helpers: Helpers, as the name suggests, add an extra layer of abstraction to make it easier for users to write simulation scripts with fewer lines of code.<br /> # Logging: Allows a user to perform classical 'printf' style debugging with ease.<br /> # Tracing: This is ns-3's mechanism to probe and collect information from particular points of the simulation system. This can be from different part's of a node's stack such as the NetDevice, the PHY, or the transport.<br /> # Use [http://mercurial.selenic.com/ Mercurial] to clone [http://code.nsnam.org/ns-3-dev ns-3-dev].<br /> # Build ns-3.<br /> <br /> === Basic Simulation Tutorial ===<br /> This tutorial covers the writing of basic simulation scripts. The following sequence of steps will be involved:<br /> # Creating nodes.<br /> # Adding Csma network devices to the nodes and connecting the devices.<br /> # Setting up an Ipv4 stack on the nodes.<br /> # Setting up applications on the nodes.<br /> # Running the simulation.<br /> # Viewing Trace Files using [http://www.wireshark.org/ Wireshark].<br /> <br /> == NS-3 Advanced Tutorials ==<br /> <br /> These tutorials cover Wifi simulations, routing protocols, mobility models, the PyViz visualiser, the tracing subsystem and the flow monitor.<br /> <br /> === Wifi Simulations ===<br /> # Create nodes.<br /> # Add Wifi NetDevices to the nodes. Setup the MAC/PHY properties.<br /> # Setting up an Ipv4 stack on the nodes.<br /> # Setup a routing protocol (we'll use OLSR) on the nodes to perform routing.<br /> # Setup a mobility model for the nodes.<br /> # Setup applications on the nodes.<br /> <br /> === PyViz Visualiser ===<br /> # Use PyViz to visualise the Wifi simulation.<br /> # Demonstrate the varying of simulation speed.<br /> # Observe a node's routing table and other properties attached to it.<br /> <br /> === Tracing Subsystem ===<br /> # Make use of the tracing subsystem with the Wifi simulation.<br /> # Use the tracing mechanism to observe a particular node's NetDevice.<br /> <br /> === ns-3 Flow Monitor ===<br /> # Setup the flow monitor to monitor flow statistics in the Wifi simulation.</div>

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