How to Implement Network Management in ns3

To implement the network management in ns3 achieved by setting up the network simulation that contains tools, monitoring protocols, configuring and managing network resources. The network contain simple management tasks such as traffic monitoring, performance analysis, and fault detection, as well as more complex tasks includes dynamic configuration and automated responses. Here, we provide a step-by-step implementation to achieve this:

Step-by-Step Implementation:

Step 1: Setup ns3 Environment

Make certain, ns3 is installed on your system.

Step 2: Include Necessary Modules

In this script, we have to join some necessary ns3 modules with sample:

#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/flow-monitor-module.h”

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

#include “ns3/csma-module.h”

#include “ns3/mobility-module.h”

Step 3: Create the Simulation Script

1. Setup Nodes and Network:

using namespace ns3;

NS_LOG_COMPONENT_DEFINE (“NetworkManagementExample”);

void MonitorTraffic (Ptr<FlowMonitor> monitor, Ptr<Ipv4FlowClassifier> classifier)

{

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

for (std::map<FlowId, FlowMonitor::FlowStats>::const_iterator i = stats.begin (); i != stats.end (); ++i)

{

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

NS_LOG_UNCOND (“Flow ” << i->first << ” (” << t.sourceAddress << ” -> ” << t.destinationAddress << “)\n”

<< ”  Tx Bytes:   ” << i->second.txBytes << “\n”

<< ”  Rx Bytes:   ” << i->second.rxBytes << “\n”

<< ”  Throughput: ” << i->second.rxBytes * 8.0 / (i->second.timeLastRxPacket.GetSeconds() – i->second.timeFirstTxPacket.GetSeconds()) / 1024 / 1024 << ” Mbps”);

}

Simulator::Schedule (Seconds (1.0), &MonitorTraffic, monitor, classifier);

}

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

{

CommandLine cmd;

cmd.Parse (argc, argv);

// Create nodes

NodeContainer endDevices;

endDevices.Create (4);

NodeContainer routers;

routers.Create (2);

// Create point-to-point links

PointToPointHelper pointToPoint;

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

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

NetDeviceContainer devices;

devices = pointToPoint.Install (NodeContainer (endDevices.Get (0), routers.Get (0)));

devices.Add (pointToPoint.Install (NodeContainer (endDevices.Get (1), routers.Get (0))));

devices.Add (pointToPoint.Install (NodeContainer (endDevices.Get (2), routers.Get (1))));

devices.Add (pointToPoint.Install (NodeContainer (endDevices.Get (3), routers.Get (1))));

devices.Add (pointToPoint.Install (NodeContainer (routers.Get (0), routers.Get (1))));

// Install Internet stack

InternetStackHelper stack;

stack.Install (endDevices);

stack.Install (routers);

// Assign IP addresses

Ipv4AddressHelper address;

Ipv4InterfaceContainer interfaces;

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

interfaces.Add (address.Assign (devices.Get (0)));

interfaces.Add (address.Assign (devices.Get (1)));

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

interfaces.Add (address.Assign (devices.Get (2)));

interfaces.Add (address.Assign (devices.Get (3)));

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

interfaces.Add (address.Assign (devices.Get (4)));

// Set up applications

uint16_t port = 9;  // Discard port (RFC 863)

// Server application on one end device

Address serverAddress (InetSocketAddress (Ipv4Address::GetAny (), port));

PacketSinkHelper packetSinkHelper (“ns3::UdpSocketFactory”, serverAddress);

ApplicationContainer sinkApps = packetSinkHelper.Install (endDevices.Get (3));

sinkApps.Start (Seconds (1.0));

sinkApps.Stop (Seconds (20.0));

// Client application on another end device

OnOffHelper onoff (“ns3::UdpSocketFactory”, Address (InetSocketAddress (Ipv4Address (“10.1.2.2”), port)));

onoff.SetConstantRate (DataRate (“1Mbps”));

ApplicationContainer apps = onoff.Install (endDevices.Get (0));

apps.Start (Seconds (2.0));

apps.Stop (Seconds (20.0));

// Flow monitor

FlowMonitorHelper flowmon;

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

// Schedule traffic monitoring

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

Simulator::Schedule (Seconds (1.0), &MonitorTraffic, monitor, classifier);

Simulator::Stop (Seconds (20.0));

Simulator::Run ();

monitor->SerializeToXmlFile(“flowmon-results.xml”, true, true);

Simulator::Destroy ();

return 0;

}

Step 4: Run the Simulation

Compile and run your simulation script:

sh

./waf configure

./waf build

./waf –run NetworkManagementExample

Explanation

• Node Creation: Create nodes representing diverse devices and routers in the network.
• Point-to-Point Links: Configure point-to-point links amongst nodes.
• Internet Stack: Install the Internet stack on all nodes.
• IP Configuration: Consign IP addresses to the interfaces.
• Applications: Use OnOffApplication and PacketSink to simulate traffic between nodes.
• Flow Monitor: Use the flow monitor to gather traffic data and list the MonitorTraffic function to log traffic statistics periodically.

Advanced Network Management Techniques

1. Dynamic Configuration:

During the simulation process, we have to amend the network constraints like changing data rates or rerouting traffic.

void ChangeDataRate (Ptr<PointToPointNetDevice> device, std::string newRate)

{

device->SetAttribute (“DataRate”, StringValue (newRate));

}

 

Simulator::Schedule (Seconds (10.0), &ChangeDataRate, DynamicCast<PointToPointNetDevice> (devices.Get (0)), “5Mbps”);

1. Fault Detection and Recovery:

To manage the network failures, we can execute fault detection and recovery mechanisms.

void DetectAndRecoverFault (Ptr<Node> node)

{

// Implement fault detection logic

bool faultDetected = /* condition to detect fault */;

if (faultDetected)

{

NS_LOG_UNCOND (“Fault detected on node ” << node->GetId () << “, taking recovery actions…”);

// Implement recovery logic, e.g., rerouting traffic

}

Simulator::Schedule (Seconds (1.0), &DetectAndRecoverFault, node);

}

 

Simulator::Schedule (Seconds (1.0), &DetectAndRecoverFault, nodes.Get (1));

1. Quality of Service (QoS):

Implement QoS mechanisms to prioritize certain types of traffic and ensure performance.

TrafficControlHelper tch;

tch.SetRootQueueDisc (“ns3::FqCoDelQueueDisc”);

tch.Install (devices);

1. Network Visualization:

To visualize the network and their traffic flows, we can use tools like NetAnim for network visualization.

AnimationInterface anim (“network-management.xml”);

anim.SetConstantPosition (endDevices.Get (0), 1.0, 2.0);

anim.SetConstantPosition (endDevices.Get (1), 2.0, 2.0);

anim.SetConstantPosition (routers.Get (0), 1.5, 1.5);

anim.SetConstantPosition (routers.Get (1), 2.5, 1.5);

1. Security and Monitoring:

We have to execute some security measures like firewall rules and intrusion detection systems.

void SetupFirewall (Ptr<Node> node, Ipv4Address blockedAddress)

{

Ptr<Ipv4> ipv4 = node->GetObject<Ipv4> ();

Ipv4StaticRoutingHelper staticRoutingHelper;

Ptr<Ipv4StaticRouting> staticRouting = staticRoutingHelper.GetStaticRouting (ipv4);

staticRouting->AddHostRouteTo (blockedAddress, Ipv4Address (“0.0.0.0”), 1);

}

Simulator::Schedule (Seconds (5.0), &SetupFirewall, routers.Get (0), Ipv4Address (“10.1.2.2”));

With the help of the provided details, we completely known the concept and implementation process of network management in ns3 and we can also offer any other information about the network management.

We provide  optimal results on performance analysis and implementation of Network Management in ns3 simulation, you can rely on our expert assistance. The developers at ns3simulation.com will guide you through the project execution steps tailored to your specific needs, ensuring the best outcomes.