To implement the network traffic analysis in ns3 has numerous steps that start from setup the simulated scenario to gather and evaluating the traffic information.
The given below is the complete procedure on how to implement the network traffic analysis in ns3:
Step-by-Step Implementation:
Step 1: Set Up the Simulation Environment
- Initially, make sure ns3 is installed in the computer.
Step 2: Create the Network Topology
- Make the network topology use of ns3. The below is the sample script to setup the basic network with two nodes that relates by a point-to-point link.
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/point-to-point-module.h”
#include “ns3/applications-module.h”
using namespace ns3;
int main (int argc, char *argv[])
{
CommandLine cmd;
cmd.Parse (argc, argv);
NodeContainer nodes;
nodes.Create (2);
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute (“DataRate”, StringValue (“5Mbps”));
pointToPoint.SetChannelAttribute (“Delay”, StringValue (“2ms”));
NetDeviceContainer devices;
devices = pointToPoint.Install (nodes);
InternetStackHelper stack;
stack.Install (nodes);
Ipv4AddressHelper address;
address.SetBase (“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer interfaces = address.Assign (devices);
UdpEchoServerHelper echoServer (9);
ApplicationContainer serverApps = echoServer.Install (nodes.Get (1));
serverApps.Start (Seconds (1.0));
serverApps.Stop (Seconds (10.0));
UdpEchoClientHelper echoClient (interfaces.GetAddress (1), 9);
echoClient.SetAttribute (“MaxPackets”, UintegerValue (1));
echoClient.SetAttribute (“Interval”, TimeValue (Seconds (1.0)));
echoClient.SetAttribute (“PacketSize”, UintegerValue (1024));
ApplicationContainer clientApps = echoClient.Install (nodes.Get (0));
clientApps.Start (Seconds (2.0));
clientApps.Stop (Seconds (10.0));
Simulator::Run ();
Simulator::Destroy ();
return 0;
}
Step 3: Enable Traffic Monitoring
- To evaluate the network traffic, allow packet tracing and logging in ns3. We can use the FlowMonitor module to observe and evaluate the traffic.
#include “ns3/flow-monitor-helper.h”
// Add these lines before Simulator::Run();
FlowMonitorHelper flowmonHelper;
Ptr<FlowMonitor> monitor = flowmonHelper.InstallAll ();
// Add these lines after Simulator::Destroy();
monitor->CheckForLostPackets ();
Ptr<Ipv4FlowClassifier> classifier = DynamicCast<Ipv4FlowClassifier> (flowmonHelper.GetClassifier ());
std::map<FlowId, FlowMonitor::FlowStats> stats = monitor->GetFlowStats ();
for (std::map<FlowId, FlowMonitor::FlowStats>::const_iterator i = stats.begin (); i != stats.end (); ++i)
{
Ipv4FlowClassifier::FiveTuple t = classifier->FindFlow (i->first);
std::cout << “Flow ID: ” << i->first << ” Source Address: ” << t.sourceAddress << ” Destination Address: ” << t.destinationAddress << std::endl;
std::cout << “Tx Packets = ” << i->second.txPackets << std::endl;
std::cout << “Rx Packets = ” << i->second.rxPackets << std::endl;
std::cout << “Throughput: ” << i->second.rxBytes * 8.0 / (i->second.timeLastRxPacket.GetSeconds () – i->second.timeFirstTxPacket.GetSeconds ()) / 1024 / 1024 << ” Mbps” << std::endl;
}
Step 4: Run the Simulation
- Compile and run your ns3 script.
./waf configure
./waf build
./waf –run <your_script_name>
Step 5: Analyse the Results
- After running the simulation, we need to validate the outcomes like number of transmitted and received packets, and throughput. Furthermore we can estimate the information to update the script to gather additional metrics.
Step 6: Visualize the Results (Optional)
- For more comprehensive analysis and visualization, consider exporting the data to a file and using external tools like Python with matplotlib, or tools like Wireshark for packet analysis.
// Export FlowMonitor results to XML
monitor->SerializeToXmlFile(“flowmon-results.xml”, true, true);
We had learned and understand how the number of transmitted and received packets will perform during simulation with ns3 framework. Here, we support and help further details about how the Network traffic analysis will simulated in other tools.
If you need to do Network traffic analysis in ns3 for your project, you can reach out to ns3simulation.com. Our developers offer the best solution and can assist you with performance analysis for the best outcomes.