How to Begin Implement Network Logging in NS3

To begin the network logging in ns-3 has been includes their recording a replication of actions, like as packet communication, reception, stops, and other network activities. Logging helps in debugging, analyzing, and envision for the behavior of network.

Here’s how to begin implementing network logging in ns-3:

Steps to Begin Implement Network Logging in NS3

1. Understand Network Logging in ns-3

• Types of Logging:
  • Simulation Events: The record action such as packet sends, receives, and stopped.
  • Application-Level Logs: Seizure the behavior for applications such as UDP or TCP.
  • Custom Logs: Make the records completed the replication of necessary.
• Logging Mechanisms:
  • Built-in logging by NS_LOG.
  • Tracing through TraceSources and AsciiTraceHelper.
  • Custom logging through callbacks.

2. Set up ns-3 Environment

• Install ns-3 if not already done:

git clone https://gitlab.com/nsnam/ns-3-dev.git

cd ns-3-dev

./ns3 configure –enable-examples –enable-tests

./ns3 build

• Validate the installation:

./ns3 run hello-simulator

3. Enable Built-in Logging

• NS_LOG: Use the NS_LOG macro for record the action during replication.
• Ensure the recording for detailed components in the code:

#define NS_LOG_APPEND_CONTEXT \

std::clog << “[MySimulationContext]

NS_LOG_COMPONENT_DEFINE(“MySimulation”);

int main(int argc, char *argv[]) {

LogComponentEnable(“MySimulation”, LOG_LEVEL_ALL);

NS_LOG_INFO(“Starting simulation…”);

Simulator::Run();

Simulator::Destroy();

NS_LOG_INFO(“Simulation finished.”);

return 0;

}

4. Use AsciiTraceHelper for Tracing

• Log the packet-level measures for text file in offline analysis.
• Enhance ASCII tracing for the replication:

AsciiTraceHelper ascii;

p2p.EnableAsciiAll(ascii.CreateFileStream(“network-logging.tr”));

• These logs are packet transmissions, receptions, and other measures for all connection.

5. Use PCAP Tracing for Detailed Packet Analysis

• Ensure the PCAP tracing for seizure the comprehensive packet data tools such as Wireshark:

p2p.EnablePcapAll(“network-logging”);

• This build a .pcap files by complete information about packets are modified in the replication.

6. Custom Logging with Callbacks

• Assign the custom callbacks for detailed actions for sample packet sends, receives, or drops.
• Example: Log packets forward from the device:

void LogPacketSend(Ptr<const Packet> packet) {

NS_LOG_UNCOND(“Packet sent: ” << *packet);

}

NetDeviceContainer devices = p2p.Install(nodes);

devices.Get(0)->TraceConnectWithoutContext(“PhyTxEnd”, MakeCallback(&LogPacketSend));

• Common trace sources include:
  • “PhyTxEnd”: Logs after the packet is forwarded.
  • “PhyRxEnd”: Logs after the packet is received.
  • “Drop”: Logs are stopped the packet.

7. Use FlowMonitor for End-to-End Metrics

• Install FlowMonitor for seizure the throughput, delay, packet delivery ratio, and other performance metrics.
• Example:

FlowMonitorHelper flowmon;

Ptr<FlowMonitor> monitor = flowmon.InstallAll();

Simulator::Run();

monitor->SerializeToXmlFile(“flow-monitor.xml”, true, true);

• This builds a XML file through specific for performance of flow-level metrics.

8. Complete Example Code for Network Logging

Here is an sample for associate the several logging methods:

#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”

#include “ns3/flow-monitor-module.h”

#include “ns3/traffic-control-module.h”

using namespace ns3;

// Custom packet logging function

void LogPacketSend(Ptr<const Packet> packet) {

NS_LOG_UNCOND(“Packet sent at: ” << Simulator::Now().GetSeconds() << “s, Size: ” << packet->GetSize() << ” bytes”);

}

int main(int argc, char *argv[]) {

// Enable logging

LogComponentEnable(“UdpEchoClientApplication”, LOG_LEVEL_INFO);

LogComponentEnable(“UdpEchoServerApplication”, LOG_LEVEL_INFO);

// Create nodes

NodeContainer nodes;

nodes.Create(2);

// Set up Point-to-Point link

PointToPointHelper p2p;

p2p.SetDeviceAttribute(“DataRate”, StringValue(“10Mbps”));

p2p.SetChannelAttribute(“Delay”, StringValue(“2ms”));

NetDeviceContainer devices = p2p.Install(nodes);

// Install 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);

// Install applications

UdpEchoServerHelper echoServer(9);

ApplicationContainer serverApp = echoServer.Install(nodes.Get(1));

serverApp.Start(Seconds(1.0));

serverApp.Stop(Seconds(10.0));

UdpEchoClientHelper echoClient(interfaces.GetAddress(1), 9);

echoClient.SetAttribute(“MaxPackets”, UintegerValue(5));

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

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

ApplicationContainer clientApp = echoClient.Install(nodes.Get(0));

clientApp.Start(Seconds(2.0));

clientApp.Stop(Seconds(10.0));

// Attach custom logging to packet transmission

devices.Get(0)->TraceConnectWithoutContext(“PhyTxEnd”, MakeCallback(&LogPacketSend));

// Enable ASCII and PCAP tracing

AsciiTraceHelper ascii;

p2p.EnableAsciiAll(ascii.CreateFileStream(“network-logging.tr”));

p2p.EnablePcapAll(“network-logging”);

// Install FlowMonitor

FlowMonitorHelper flowmon;

Ptr<FlowMonitor> monitor = flowmon.InstallAll();

// Run simulation

Simulator::Run();

// Output FlowMonitor results

monitor->SerializeToXmlFile(“flow-monitor.xml”, true, true);

Simulator::Destroy();

return 0;

}

9. Analyze Logs

• Use generated log files:
  • .tr file: Investigate by custom scripts or manually tracing for text-based files.
  • .pcap file: Start through Wireshark for examines the packet-level.
  • flow-monitor.xml: Study by tools or scripts for excerpt the performance of flow-level metrics.

In the comprehensive manual, we were guided and helped you to get started Logging helps in debugging, analyzing, and envision for the behavior of network projects in ns3. You can also analyse the simulation. We will supply another manual to address your questions about this project.