To implement the distance vector routing in ns3 has numerous phases, If you face any difficulties in programming of distance vector routing in ns3 then you can gain support from ns3simulation.com.
now we are going to see how to implement the distance vector routing in ns3 simulation tool:
Step-by-Step Implementation
- Set Up ns3 Environment: To make certain ns3 is installed in the computer. If not then download it from official website.
- Include Necessary Libraries: Starts to contain the essential ns3 libraries in the script.
- Define Network Topology: for network topology need to make the links and nodes.
- Install Internet Stack: On the nodes download the internet stack.
- Configure Distance Vector Routing: Custom the built-in distance vector routing protocol or implement your own.
- Set up Applications: Install applications to generate traffic and test the routing.
- Run the Simulation: Configure the performance metrics and execute it.
Here, we had given the procedures on how to demonstrate by using the C++ programming language in these phases:
Step-by-Step Implementation
- Include Libraries:
#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/ipv4-global-routing-helper.h”
#include “ns3/distance-vector-routing.h” // Ensure you have this or similar header if using custom implementation
- Define Network Topology:
using namespace ns3;
int main(int argc, char *argv[]) {
CommandLine cmd;
cmd.Parse(argc, argv);
NodeContainer nodes;
nodes.Create(4);
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“5Mbps”));
pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));
NetDeviceContainer devices;
devices = pointToPoint.Install(nodes.Get(0), nodes.Get(1));
devices = pointToPoint.Install(nodes.Get(1), nodes.Get(2));
devices = pointToPoint.Install(nodes.Get(2), nodes.Get(3));
InternetStackHelper stack;
stack.Install(nodes);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer interfaces;
interfaces = address.Assign(devices);
- Configure Distance Vector Routing:
// Assuming you have a distance vector routing implementation
DistanceVectorRoutingHelper distanceVectorRouting;
Ipv4ListRoutingHelper list;
list.Add(distanceVectorRouting, 0);
InternetStackHelper stack;
stack.SetRoutingHelper(list);
stack.Install(nodes);
- Set Up Applications:
uint16_t port = 9;
UdpEchoServerHelper server(port);
ApplicationContainer apps = server.Install(nodes.Get(3));
apps.Start(Seconds(1.0));
apps.Stop(Seconds(10.0));
UdpEchoClientHelper client(interfaces.GetAddress(3), port);
client.SetAttribute(“MaxPackets”, UintegerValue(1));
client.SetAttribute(“Interval”, TimeValue(Seconds(1.0)));
client.SetAttribute(“PacketSize”, UintegerValue(1024));
apps = client.Install(nodes.Get(0));
apps.Start(Seconds(2.0));
apps.Stop(Seconds(10.0));
- Run the Simulation:
Simulator::Run();
Simulator::Destroy();
return 0;
}
Notes
- Custom Distance Vector Implementation: in ns3 does not have built-in function for distance vector routing protocol then we need to implement by ourselves. This involves creating a new routing protocol class derived from Ipv4RoutingProtocol and implementing the required methods.
- Validation: Make certain that your execution is properly circulating route updates and handling link variations. This can be tested by setting up various scenarios and verifying the routes using Ipv4GlobalRoutingHelper::PopulateRoutingTables.
Running the Code
- Save your script to a file, for example, distance-vector-routing.cc.
- Compile the script using the ns-3 build system
./waf configure –enable-examples
./waf build
./waf –run scratch/distance-vector-routing
Here, we had learned about how the distance vector routing performed in the ns3 projects and also we provide simulation support related information based on distance vector routing protocol.