How to Calculate Network DHCP Management in ns3

To calculate the Dynamic Host Configuration Protocol (DHCP) management in ns3 includes simulating the process of dynamically assigning IP addresses to network devices and monitoring the effectiveness and performance of this method. Here we provide the procedures on how to calculate and evaluate the DHCP management in ns3:

Steps to Simulate and Calculate Network DHCP Management in ns3:

1. Set Up the ns3 Environment:
   • Make certain you have ns3 installed and properly configured.
2. Define the Network Topology:
   • Create a network topology with nodes representing clients, DHCP servers, and other network elements.
3. Implement DHCP Mechanisms:
   • Simulate DHCP request and response processes using ns3 DHCP model.
4. Install Applications:
   • Install traffic-generating applications on the nodes to simulate network traffic.
5. Monitor and Log Events:
   • Use trace sources or callbacks to monitor and log DHCP request and response times, as well as other relevant events.
6. Analyse DHCP Management Data:
   • Collect and analyse the logged data to assess the efficiency and performance of DHCP operations.

Example Code

The given below is an instance on how to setup a basic ns3 simulation to evaluate the network of DHCP management. It simulates by DHCP requests and logs the request and response times.

#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/dhcp-module.h”

using namespace ns3;

NS_LOG_COMPONENT_DEFINE (“NetworkDhcpManagementExample”);

void DhcpRequestCallback (Ptr<const Packet> packet, const Address &srcAddress, const Address &dstAddress)

{

NS_LOG_UNCOND (“DHCP Request sent from ” << InetSocketAddress::ConvertFrom (srcAddress).GetIpv4 () << ” to ” << InetSocketAddress::ConvertFrom (dstAddress).GetIpv4 () << ” at ” << Simulator::Now ().GetSeconds () << ” seconds”);

}

void DhcpResponseCallback (Ptr<const Packet> packet, const Address &srcAddress, const Address &dstAddress)

{

NS_LOG_UNCOND (“DHCP Response received from ” << InetSocketAddress::ConvertFrom (srcAddress).GetIpv4 () << ” to ” << InetSocketAddress::ConvertFrom (dstAddress).GetIpv4 () << ” at ” << Simulator::Now ().GetSeconds () << ” seconds”);

}

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

{

CommandLine cmd;

cmd.Parse (argc, argv);

Time::SetResolution (Time::NS);

// Create nodes

NodeContainer nodes;

nodes.Create (3); // One client, one DHCP server, and one regular server

// Create point-to-point links

PointToPointHelper pointToPoint;

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

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

NetDeviceContainer devices1 = pointToPoint.Install (NodeContainer (nodes.Get (0), nodes.Get (1))); // Client to DHCP Server

NetDeviceContainer devices2 = pointToPoint.Install (NodeContainer (nodes.Get (1), nodes.Get (2))); // DHCP Server to Regular Server

// Install the internet stack on nodes

InternetStackHelper stack;

stack.Install (nodes);

// Assign IP addresses to the devices

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);

// Enable routing

Ipv4GlobalRoutingHelper::PopulateRoutingTables ();

// DHCP Server

DhcpServerHelper dhcpServer (Ipv4Address (“10.1.1.1”), Ipv4Address (“10.1.1.10”));

ApplicationContainer dhcpServerApp = dhcpServer.Install (nodes.Get (1));

dhcpServerApp.Start (Seconds (1.0));

dhcpServerApp.Stop (Seconds (10.0));

// Regular Server

UdpServerHelper regularServer (9);

ApplicationContainer regularServerApp = regularServer.Install (nodes.Get (2));

regularServerApp.Start (Seconds (1.0));

regularServerApp.Stop (Seconds (10.0));

// Client DHCP Request

DhcpClientHelper dhcpClient;

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

clientApp.Start (Seconds (2.0));

clientApp.Stop (Seconds (10.0));

// Trace DHCP request and response

Config::ConnectWithoutContext (“/NodeList/*/ApplicationList/*/$ns3::DhcpClient/Tx”, MakeCallback (&DhcpRequestCallback));

Config::ConnectWithoutContext (“/NodeList/*/ApplicationList/*/$ns3::DhcpServer/Rx”, MakeCallback (&DhcpResponseCallback));

Simulator::Stop (Seconds (11.0));

Simulator::Run ();

Simulator::Destroy ();

return 0;

}

Explanation

1. Setup: The code sets up a network topology with three nodes: one client, one DHCP server, and one regular server, connected by point-to-point links.
2. Internet Stack and Routing: The internet stack is installed on all nodes, and global routing is enabled.
3. DHCP Server: A DHCP server is installed on the DHCP server node (node 1) to handle DHCP requests.
4. Regular Server: A UDP server is installed on the regular server node (node 2) to handle other types of requests.
5. Client DHCP Request: A DHCP client is installed on the client node (node 0) to send DHCP requests to the DHCP server.
6. DHCP Request and Response Tracing: The DhcpRequestCallback and DhcpResponseCallback functions log the times at which DHCP requests are sent and responses are received, respectively.
7. Simulation Schedule: The client application is scheduled to start sending DHCP requests at 2 seconds into the simulation and stop at 10 seconds.

Running the Simulation

Compile and run the simulation using the following commands in your ns3 environment:

./waf configure

./waf build

./waf –run network-dhcp-management-example

Replace network-dhcp-management-example with the actual name of your script file.

Here, we had implemented and executed the Dynamic Host Configuration Protocol in ns3 simulation tool. We will explore how the DHCP evaluated within other simulation frameworks.Share with ns3simulation.com all the specifics about your Network DHCP Management parameters, and we’ll give you fresh outcomes.