How to Start Peer-to-Peer Topology Projects using NS3

To create the Peer-to-Peer (P2P) Topology signifies the network in which nodes communicate directly by every other deprived of relying on centralized servers. This topology approach is utilized for their applications such as file sharing, blockchain, and distributed systems. Here the following step by step of this below procedure.

Steps to Start Peer-to-Peer Topology Projects using NS3

Step 1: Set Up NS-3

  1. Install NS-3:
    • Download NS-3.
    • Track the installation process.
  2. Verify Installation: Processing a basic NS-3 script we check their functionality:

./waf –run scratch/my_first

Step 2: Understand Peer-to-Peer Topology

  • P2P Topology:
    • The Nodes are communicating directly by every more authority without a central.
    • The Links could be setting the dynamically among peers.
    • Applications can be replicate the P2P protocols such as BitTorrent or Gnutella.

Step 3: Plan the Topology

  1. Define the number of peers:
    • For Sample, the six nodes are a P2P network.
  2. Set goals:
    • Replicate the data sharing among peers.
    • Estimate the performance parameter metrics such as throughput, delay, and packet loss.

Step 4: Set Up the P2P Topology

  1. Create Nodes: State the nodes for the P2P network.

NodeContainer nodes;

uint32_t numPeers = 6; // Number of peers

nodes.Create(numPeers);

  1. Set Up Point-to-Point Links: Utilized for their setup approach PointToPointHelper to describe the connection properties.

PointToPointHelper p2p;

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

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

  1. Connect Nodes in a Fully Connected or Custom Topology:
    • Fully Connected Topology: Connect the every node to each other node.

NetDeviceContainer devices;

for (uint32_t i = 0; i < numPeers; ++i) {

for (uint32_t j = i + 1; j < numPeers; ++j) {

NetDeviceContainer link = p2p.Install(nodes.Get(i), nodes.Get(j));

devices.Add(link);

}

}

    • Custom Topology: State the specific connections among nodes.

std::vector<std::pair<uint32_t, uint32_t>> connections = {

{0, 1}, {1, 2}, {2, 3}, {3, 4}, {4, 5}, {5, 0}

};

NetDeviceContainer devices;

for (auto &connection : connections) {

NetDeviceContainer link = p2p.Install(nodes.Get(connection.first), nodes.Get(connection.second));

devices.Add(link);

}

  1. Install Internet Stack: Improve the Internet stack to overall nodes.

InternetStackHelper stack;

stack.Install(nodes);

  1. Assign IP Addresses: Allocate the unique IP addresses to every connection.

Ipv4AddressHelper address;

uint32_t subnetIndex = 1;

for (uint32_t i = 0; i < devices.GetN(); ++i) {

std::ostringstream subnet;

subnet << “10.1.” << subnetIndex++ << “.0”;

address.SetBase(subnet.str().c_str(), “255.255.255.0”);

address.Assign(devices.Get(i));

}

Step 5: Set Up Applications

  1. Server Application: Dwelling a UDP echo server on one node to replicate a data-sharing peer.

UdpEchoServerHelper echoServer(9); // Port 9

ApplicationContainer serverApp = echoServer.Install(nodes.Get(0)); // First node as server

serverApp.Start(Seconds(1.0));

serverApp.Stop(Seconds(10.0));

  1. Client Applications: Install UDP echo clients on other nodes to communicate with the server.

for (uint32_t i = 1; i < numPeers; ++i) {

UdpEchoClientHelper echoClient(Ipv4Address(“10.1.1.1”), 9); // Server’s IP

echoClient.SetAttribute(“MaxPackets”, UintegerValue(10));

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

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

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

clientApp.Start(Seconds(2.0));

clientApp.Stop(Seconds(10.0));

}

Step 6: Run and Analyze

  1. Run the Simulation:

Simulator::Run();

Simulator::Destroy();

  1. Enable Packet Capture: Save .pcap files for traffic analysis.

p2p.EnablePcapAll(“p2p_topology”);

  1. Trace Logs: Ensure the NS-3 logging for debugging:

export NS_LOG=”UdpEchoClientApplication=level_all|prefix_func”

./waf –run scratch/p2p_topology

Example: Minimal NS-3 Script for Peer-to-Peer Topology

#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[]) {

uint32_t numPeers = 6;

// Create nodes

NodeContainer nodes;

nodes.Create(numPeers);

// Set up Point-to-Point links

PointToPointHelper p2p;

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

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

// Connect nodes in a fully connected topology

NetDeviceContainer devices;

for (uint32_t i = 0; i < numPeers; ++i) {

for (uint32_t j = i + 1; j < numPeers; ++j) {

NetDeviceContainer link = p2p.Install(nodes.Get(i), nodes.Get(j));

devices.Add(link);

}

}

// Install Internet stack

InternetStackHelper stack;

stack.Install(nodes);

// Assign IP addresses

Ipv4AddressHelper address;

uint32_t subnetIndex = 1;

for (uint32_t i = 0; i < devices.GetN(); ++i) {

std::ostringstream subnet;

subnet << “10.1.” << subnetIndex++ << “.0”;

address.SetBase(subnet.str().c_str(), “255.255.255.0”);

address.Assign(devices.Get(i));

}

// Set up UDP echo server on the first node

UdpEchoServerHelper echoServer(9);

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

serverApp.Start(Seconds(1.0));

serverApp.Stop(Seconds(10.0));

// Set up UDP echo clients on other nodes

for (uint32_t i = 1; i < numPeers; ++i) {

UdpEchoClientHelper echoClient(Ipv4Address(“10.1.1.1”), 9);

echoClient.SetAttribute(“MaxPackets”, UintegerValue(10));

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

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

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

clientApp.Start(Seconds(2.0));

clientApp.Stop(Seconds(10.0));

}

// Enable packet capture

p2p.EnablePcapAll(“p2p_topology”);

// Run the simulation

Simulator::Run();

Simulator::Destroy();

return 0;

}

Step 7: Compile and Run

  1. Save the script as p2p_topology.cc.
  2. We compile and run it:

./waf –run p2p_topology

Step 8: Enhance the Simulation

  • Experiment with P2P Protocols:
    • Establish the protocols such as BitTorrent or Gnutella.
  • Simulate Failures:
    • Unconnected the nodes or connections to validate fault tolerance.
  • Analyze Performance:
    • Calculate the throughput, latency, and packet loss for P2P communication.
  • Visualize:
    • Utilized for them visualize NetAnim we display the P2P topology and data modify.

Next Steps

  • Scale Up:
    • The Number of peers is increased and we replicate a large of P2P network.
  • Add Dynamic Connections:
    • The connections are dynamically built or eliminate the connection during their replication.
  • Incorporate Application Logic:
    • Replicate the actual P2P applications such as a file sharing or distributed computing.

In this guide consider the peer to peer topology projects using ns3 it contains the install process and stimulate the planning process for topology and finally implement the execution of the topology process.

We specialize in file sharing, blockchain, and distributed systems relevant to your work. Feel free to reach out to us for further communication. Initiating a Peer-to-Peer (P2P) Topology Project in NS-3 can be challenging; however, at phdprojects.org, we provide tailored assistance whenever required. Simply send us a message, and we will help you with the best simulations and topics.