How to Start Distributed Routing Projects Using NS3

To start a distributed routing project in NS3, following is an in-depth approach:

Steps to Start Distributed Routing Projects in NS3

  1. Install and Set Up NS3
  1. Initially, we install NS3 on the computer:

sudo apt update

sudo apt install g++ python3 git cmake

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

cd ns-3-dev

./waf configure

./waf build

  1. Verify the Installation: We should execute an example to make sure NS3 is installed properly:

./waf –run scratch/my-first

  1. Understand Distributed Routing

Distributed routing protocols actively find the paths without needing global network knowledge. Crcuail examples contain:

  • AODV (Ad hoc On-Demand Distance Vector): Reactive protocol for MANETs.
  • OLSR (Optimized Link State Routing): Proactive link-state protocol.
  • DSDV (Destination-Sequenced Distance-Vector Routing): Distance-vector protocol including periodic updates.

NS3 environment offers some distributed routing protocols executions like AODV and OLSR that can be utilized as a base or changed for project.

  1. Choose a Distributed Routing Protocol
  • Select whether to:
    • We can be utilized an existing protocol such as AODV, OLSR, or DSDV.
    • We execute the custom distributed routing protocol.
  1. Set Up a Basic Simulation
  1. Make Nodes and then describe the network topology.
  2. We should install the Internet Stack and indicate a distributed routing protocol.
  3. Replicate the traffic and also examine the behavior of routing.

Example: AODV Routing Simulation

Below is a simple instance to replicate the distributed routing using AODV:

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/aodv-helper.h”

#include “ns3/ipv4-global-routing-helper.h”

#include “ns3/point-to-point-module.h”

using namespace ns3;

int main() {

NodeContainer nodes;

nodes.Create(4); // Create 4 nodes

PointToPointHelper pointToPoint;

pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“5Mbps”));

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

NetDeviceContainer devices1 = pointToPoint.Install(nodes.Get(0), nodes.Get(1));

NetDeviceContainer devices2 = pointToPoint.Install(nodes.Get(1), nodes.Get(2));

NetDeviceContainer devices3 = pointToPoint.Install(nodes.Get(2), nodes.Get(3));

InternetStackHelper stack;

AodvHelper aodv;

stack.SetRoutingHelper(aodv); // Use AODV as the distributed routing protocol

stack.Install(nodes);

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces1 = address.Assign(devices1);

address.SetBase(“10.1.2.0”, “255.255.255.0”);

Ipv4InterfaceContainer interfaces2 = address.Assign(devices2);

address.SetBase(“10.1.3.0”, “255.255.255.0”);

Ipv4InterfaceContainer interfaces3 = address.Assign(devices3);

// Simulate traffic

Ipv4GlobalRoutingHelper::PopulateRoutingTables();

Simulator::Stop(Seconds(10.0));

Simulator::Run();

Simulator::Destroy();

return 0;

}

  1. Implement Custom Distributed Routing Protocol

If we require executing a new distributed routing protocol:

  1. Extend the Ipv4RoutingProtocol Class:
    • Describe the behavior of custom protocol for route discovery, maintenance, and updates.
    • We execute the distributed decision-making according to the neighbor updates or parameters.

Example: Skeleton for Custom Routing Protocol

#include “ns3/ipv4-routing-protocol.h”

namespace ns3 {

class DistributedRoutingProtocol : public Ipv4RoutingProtocol {

public:

static TypeId GetTypeId();

DistributedRoutingProtocol();

virtual ~DistributedRoutingProtocol();

// Implement required methods

Ptr<Ipv4Route> RouteOutput(Ptr<Packet> packet, const Ipv4Header &header,

Ptr<NetDevice> oif, Socket::SocketErrno &sockerr) override;

void ReceiveRoutingUpdate();

private:

void SendRoutingUpdate();

std::map<uint32_t, uint32_t> routingTable; // Stores destination and next-hop

};

} // namespace ns3

  1. Analyze Network Performance
  • We should examine the network performance metrics such as:
    • Packet Delivery Ratio (PDR)
    • Average End-to-End Delay
    • Routing Overhead
  • Allow logging for debugging:

NS_LOG=”DistributedRoutingProtocol” ./waf –run your-project

  1. Visualize Results
  • We need to utilize .pcap files that are made by NS3 and examine them using Wireshark.
  • Transfer data to examine the network performance with the help of Python or MATLAB.

You can learn how to set up, run, and visualize results for Distributed Routing Projects in the NS3 environment through this comprehensive process. We’re here to offer more details in another guide tailored just for you, focusing on performance parameters that meet your needs. To tackle Distributed Routing Projects using NS3, you’ll need some skills, and our experts at phdprojects.org are ready to share all the essential insights and well-aligned topics that will grab your audience’s attention. Just send us a message, and we’ll help you out!