Ns3 Projects for B.E/B.Tech M.E/M.Tech PhD Scholars.  Phone-Number:9790238391   E-mail: ns3simulation@gmail.com

How to Implement Wired LANs in ns3

Here we Implement Wired LANs in ns3, which includes setting up a network where nodes are connected through wired links, typically using Ethernet technology for simulation process. Wired LAN simulations that are useful under controlled conditions, studying network performance, and evaluating protocols under different traffic loads to understanding the network behaviours. Wired LAN simulations protocols and programming help are carried on by us for scholars.

Below a complete guide given on how to set up a basic wired LAN using NS-3:

Step-by-Step Implementation of Wired LANs in NS-3:

Step 1: Install NS-3

Ensure that ns3 is installed on the system. Follow the installation instructions provided there.

Step 2: Set Up Basic Network

Begin by creating a script that defines a simple network topology. A common example for a wired LAN setup is a star topology where multiple nodes are connected to a central switch.

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/csma-module.h”

#include “ns3/internet-module.h”

#include “ns3/applications-module.h”

using namespace ns3;

int main ()

{

    // Enable logging

    LogComponentEnable (“UdpEchoClientApplication”, LOG_LEVEL_INFO);

    LogComponentEnable (“UdpEchoServerApplication”, LOG_LEVEL_INFO);

    // Create nodes (1 server + 3 clients)

    NodeContainer nodes;

    nodes.Create (4);

    // Create CSMA channel and set the attributes

    CsmaHelper csma;

    csma.SetChannelAttribute (“DataRate”, StringValue (“100Mbps”));

    csma.SetChannelAttribute (“Delay”, TimeValue (NanoSeconds (6560)));

    // Install network devices

    NetDeviceContainer devices;

    devices = csma.Install (nodes);

    // Install the internet stack

    InternetStackHelper stack;

    stack.Install (nodes);

    // Assign IP addresses

    Ipv4AddressHelper address;

    address.SetBase (“10.1.1.0”, “255.255.255.0”);

    Ipv4InterfaceContainer interfaces = address.Assign (devices);

    // Create and configure applications

    UdpEchoServerHelper echoServer (9);

    ApplicationContainer serverApps = echoServer.Install (nodes.Get (0));

    serverApps.Start (Seconds (1.0));

    serverApps.Stop (Seconds (10.0));

    UdpEchoClientHelper echoClient (interfaces.GetAddress (0), 9);

    echoClient.SetAttribute (“MaxPackets”, UintegerValue (1));

    echoClient.SetAttribute (“Interval”, TimeValue (Seconds (1.0)));

    echoClient.SetAttribute (“PacketSize”, UintegerValue (1024));

    ApplicationContainer clientApps = echoClient.Install (nodes.Get (1));

    clientApps.Start (Seconds (2.0));

    clientApps.Stop (Seconds (10.0));

    // Run the simulation

    Simulator::Run ();

    Simulator::Destroy ();

    return 0;

}

Step 3: Customize the Network Configuration

  • Topology: Can expand the topology, add more nodes, or change the network layout (e.g., adding redundancy with multiple switches).
  • Data Rate and Delay: Adjust the data rate and delay parameters of the CsmaHelper to simulate different network conditions.
  • Advanced Node Configurations: Configure nodes with multiple network interfaces or different roles (e.g., servers, workstations).

Step 4: Analyze Network Performance

  • Throughput: Calculate the throughput by analyzing the total data received at the server node over time.
  • Latency: Measure the round-trip time (RTT) for packets sent from clients to the server.
  • Packet Loss: Measure packet loss by comparing the number of packets sent by the clients against the number received by the server.

Step 5: Visualization and Further Analysis

  • Trace Files: Generate trace files in ns3 to analyze specific events or states in the network during the simulation.
  • Graphical Visualization: Use tools such as NetAnim or PyViz to visually analyze the simulation and understand the network topology and traffic flows.

After thorough analysis, we have reached the conclusion that the implementation of Wired LANs in ns3 using ethernet technology has been finalized. Wired LANs serve as a primary tool for examining network behavior under controlled circumstances and assessing protocols for different traffic loads, leading to the successful completion of innovative projects by our team.