How to Begin Implement Network Governance in NS3

To begin the Network governance in ns3 tool has includes for introduce, executes, and tracking the policies which control on how used the network resources are handled. It contains a wide range of devices, like as congestion management, access control, compliance enforcement, and performance of observing. Here’s a guide to get started:

Steps to Begin Implement Network Governance in NS3

1. Understand Network Governance

• Purpose: Assure the networks function is efficiently, securely, and in compliance by structural policies.
• Components of Governance:
  • Policy Definition: Instructions for network behavior such as bandwidth allocation, access control.
  • Policy Enforcement: The devices to enforce this instruction for instance firewalls, QoS.
  • Monitoring and Auditing: Continuous estimation for network performance and compliance.

2. Set up ns-3

• Install and setting the ns-3:

./waf configure –build-profile=debug –enable-examples –enable-tests

./waf build

• Confirm the installation:

./waf –run hello-simulator

3. Define Governance Requirements

• Choose what features for governance to executes:
  • Congestion prioritization for sample Quality of Service.
  • Access control and filtering.
  • Resource allocation for instance bandwidth limits, scheduling.

4. Set Up a Basic Network

Make a network topology for executes the governance policies.

Example: Basic 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[])

{

Time::SetResolution(Time::NS);

// Create nodes

NodeContainer nodes;

nodes.Create(4); // Client, Router1, Router2, Server

// Configure point-to-point links

PointToPointHelper p2p;

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

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

// Connect nodes

NetDeviceContainer devices1 = p2p.Install(nodes.Get(0), nodes.Get(1)); // Client to Router1

NetDeviceContainer devices2 = p2p.Install(nodes.Get(1), nodes.Get(2)); // Router1 to Router2

NetDeviceContainer devices3 = p2p.Install(nodes.Get(2), nodes.Get(3)); // Router2 to Server

// Install Internet stack

InternetStackHelper stack;

stack.Install(nodes);

// Assign IP addresses

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);

// Configure routing

Ipv4GlobalRoutingHelper::PopulateRoutingTables();

// Set up a UDP echo server on the server node

uint16_t port = 9;

UdpEchoServerHelper echoServer(port);

ApplicationContainer serverApp = echoServer.Install(nodes.Get(3));

serverApp.Start(Seconds(1.0));

serverApp.Stop(Seconds(10.0));

// Set up a UDP echo client on the client node

UdpEchoClientHelper echoClient(interfaces3.GetAddress(1), port);

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));

// Run simulation

Simulator::Run();

Simulator::Destroy();

return 0;

}

5. Implement Governance Mechanisms
6. Traffic Prioritization (QoS)

• To apply the bandwidth allocation for use the Control component in congestion or congestion prioritization.

TrafficControlHelper tch;

tch.SetRootQueueDisc(“ns3::FqCoDelQueueDisc”); // Fair Queueing Controlled Delay

QueueDiscContainer qdiscs = tch.Install(devices2); // Apply on Router1 to Router2 link

1. Access Control

• Enhance the packet filtering for implement the rules on source/destination IPs or protocols.

void AccessControlCallback(Ptr<Socket> socket, Ptr<Packet> packet, const Address &from)

{

Ipv4Header ipv4Header;

packet->PeekHeader(ipv4Header);

Ipv4Address source = ipv4Header.GetSource();

Ipv4Address destination = ipv4Header.GetDestination();

if (source == Ipv4Address(“10.1.1.1”) && destination == Ipv4Address(“10.1.3.1”))

{

NS_LOG_UNCOND(“Access Denied: Packet from ” << source << ” to ” << destination);

return; // Drop packet

}

NS_LOG_UNCOND(“Access Granted: Packet from ” << source << ” to ” << destination);

socket->ForwardUp(packet, from);

}

void InstallAccessControl(Ptr<Node> router)

{

Ptr<Socket> socket = Socket::CreateSocket(router, TypeId::LookupByName(“ns3::UdpSocketFactory”));

socket->SetRecvCallback(MakeCallback(&AccessControlCallback));

}

Attach to Router1:

InstallAccessControl(nodes.Get(1));

1. Monitoring and Auditing

• Use to gather the congestion statistics FlowMonitor.

#include “ns3/flow-monitor-helper.h”

FlowMonitorHelper flowmonHelper;

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

// Serialize results to XML

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

// Analyze statistics

monitor->CheckForLostPackets();

Ptr<Ipv4FlowClassifier> classifier = DynamicCast<Ipv4FlowClassifier>(flowmonHelper.GetClassifier());

std::map<FlowId, FlowMonitor::FlowStats> stats = monitor->GetFlowStats();

for (auto &flow : stats)

{

Ipv4FlowClassifier::FiveTuple t = classifier->FindFlow(flow.first);

NS_LOG_UNCOND(“Flow ” << flow.first << “: ” << t.sourceAddress << ” -> ” << t.destinationAddress);

NS_LOG_UNCOND(”  Tx Bytes: ” << flow.second.txBytes);

NS_LOG_UNCOND(”  Rx Bytes: ” << flow.second.rxBytes);

NS_LOG_UNCOND(”  Throughput: ” << (flow.second.rxBytes * 8.0 / (flow.second.timeLastRxPacket.GetSeconds() – flow.second.timeFirstTxPacket.GetSeconds())) << ” bps”);

}

6. Run and Test

• Create and process for the replication:

./waf –run scratch/network-governance

• Test the records, XML outcomes, or console output for validate the governance policies.

7. Enhance Governance Features

• Improve the features:
  • Dynamic Rules: Alter the rules for during the replication of congestion designs.
  • Custom Traffic Classes: Describe the policies for detailed applications or services.
  • Anomaly Detection: Recognize the non-compliant behavior or malicious congestion.

Example: Dynamic Rule Update

void UpdatePolicy()

{

NS_LOG_UNCOND(“Updating policy at ” << Simulator::Now().GetSeconds() << ” seconds”);

// Add or modify rules here

}

Simulator::Schedule(Seconds(5.0), &UpdatePolicy);

8. Analyze Results

• Use the records for FlowMonitor data or custom scripts to:
  • The efficiency for calculate the governance policies.
  • Classify the violations or inefficiencies.

we clearly shows how to implement and execute the network governance in ns3 tool and we also need to add and expand then conclude the more sophisticated policies mechanisms, additional nodes, and more complex network as needed. Additional queries regarding this project will be addressed in another document