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How to Calculate Network Governance in ns3

To calculate network governance in ns3, we need to implement and monitor policies, procedures, and controls to manage and regulate network behavior. For this, we should enforce security policies, quality of service (QoS) rules, access control, and more. Here is a quick guide on simulating and calculating network governance in ns3.

Steps for calculating network governance

  1. Set up the simulation :
  • Make sure that ns3 is installed in the computer. If not, install it and include necessary modules.
  1. Define Network Topology:
  • Define the network topology with nodes representing clients, servers, and intermediary nodes like routers or switches.
  1. Implement Governance Policies:
  • Define and implement policies such as traffic filtering, bandwidth limits, access controls, and QoS rules.
  1. Configure Applications:
  • To simulate network traffic, setup applications to generate and receive traffic.
  1. Monitor and Log Events:
  • To monitor log events such as packet transmissions, receptions, drops, and other relevant metrics, use trace sources or callbacks.
  1. Analyze Governance Data:
  • To verify compliance with the defined policies and to understand the network behavior, collect and analyze the logged data.

Example code

Here is an example to set up a basic simulation to calculate the performance of network governance in ns3.

#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/packet.h”

using namespace ns3;

NS_LOG_COMPONENT_DEFINE (“NetworkGovernanceExample”);

std::map<uint32_t, uint64_t> packetsSent;

std::map<uint32_t, uint64_t> packetsReceived;

std::map<uint32_t, uint64_t> packetsDropped;

std::map<uint32_t, double> bandwidthUsage;

void TxCallback (Ptr<const Packet> packet, Ptr<Ipv4> ipv4, uint32_t interface)

{

uint32_t nodeId = ipv4->GetObject<Node>()->GetId();

packetsSent[nodeId]++;

}

void RxCallback (Ptr<const Packet> packet, Ptr<Ipv4> ipv4, uint32_t interface)

{

uint32_t nodeId = ipv4->GetObject<Node>()->GetId();

packetsReceived[nodeId]++;

}

void DropCallback (Ptr<const Packet> packet, Ptr<Ipv4> ipv4, uint32_t interface)

{

uint32_t nodeId = ipv4->GetObject<Node>()->GetId();

packetsDropped[nodeId]++;

}

void BandwidthCallback (Ptr<const Packet> packet, Ptr<Ipv4> ipv4, uint32_t interface)

{

uint32_t nodeId = ipv4->GetObject<Node>()->GetId();

bandwidthUsage[nodeId] += packet->GetSize() * 8.0 / (1024 * 1024); // Convert to Mbps

}

void CalculateNetworkGovernance ()

{

NS_LOG_UNCOND (“Network Governance Report:”);

for (auto it = packetsSent.begin (); it != packetsSent.end (); ++it)

{

uint32_t nodeId = it->first;

uint64_t sent = it->second;

uint64_t received = packetsReceived[nodeId];

uint64_t dropped = packetsDropped[nodeId];

double bandwidth = bandwidthUsage[nodeId];

// Check compliance with a simple bandwidth policy: max 5 Mbps

bool compliant = (bandwidth <= 5.0);

NS_LOG_UNCOND (“Node ” << nodeId << “: Packets Sent = ” << sent << “, Packets Received = ” << received << “, Packets Dropped = ” << dropped << “, Bandwidth Usage = ” << bandwidth << ” Mbps, Compliant = ” << (compliant ? “Yes” : “No”));

}

}

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

{

CommandLine cmd;

cmd.Parse (argc, argv);

Time::SetResolution (Time::NS);

// Create nodes

NodeContainer nodes;

nodes.Create (4); // Two clients and two servers

// Create point-to-point links

PointToPointHelper pointToPoint;

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

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

NetDeviceContainer devices01 = pointToPoint.Install (NodeContainer (nodes.Get (0), nodes.Get (1)));

NetDeviceContainer devices12 = pointToPoint.Install (NodeContainer (nodes.Get (1), nodes.Get (2)));

NetDeviceContainer devices23 = pointToPoint.Install (NodeContainer (nodes.Get (2), nodes.Get (3)));

// 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 interfaces01 = address.Assign (devices01);

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

Ipv4InterfaceContainer interfaces12 = address.Assign (devices12);

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

Ipv4InterfaceContainer interfaces23 = address.Assign (devices23);

// Enable routing

Ipv4GlobalRoutingHelper::PopulateRoutingTables ();

// Create UDP server on node 2 and node 3

UdpServerHelper server (9);

ApplicationContainer serverApp1 = server.Install (nodes.Get (2));

ApplicationContainer serverApp2 = server.Install (nodes.Get (3));

serverApp1.Start (Seconds (1.0));

serverApp1.Stop (Seconds (10.0));

serverApp2.Start (Seconds (1.0));

serverApp2.Stop (Seconds (10.0));

// Create UDP client on node 0 and node 1

UdpClientHelper client1 (interfaces12.GetAddress (1), 9);

client1.SetAttribute (“MaxPackets”, UintegerValue (320));

client1.SetAttribute (“Interval”, TimeValue (MilliSeconds (10)));

client1.SetAttribute (“PacketSize”, UintegerValue (1024));

UdpClientHelper client2 (interfaces23.GetAddress (1), 9);

client2.SetAttribute (“MaxPackets”, UintegerValue (320));

client2.SetAttribute (“Interval”, TimeValue (MilliSeconds (10)));

client2.SetAttribute (“PacketSize”, UintegerValue (1024));

ApplicationContainer clientApp1 = client1.Install (nodes.Get (0));

ApplicationContainer clientApp2 = client2.Install (nodes.Get (1));

clientApp1.Start (Seconds (2.0));

clientApp1.Stop (Seconds (10.0));

clientApp2.Start (Seconds (2.0));

clientApp2.Stop (Seconds (10.0));

// Trace packet transmission, reception, drops, and bandwidth usage

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

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

Config::ConnectWithoutContext (“/NodeList/*/DeviceList/*/Drop”, MakeCallback (&DropCallback));

Config::ConnectWithoutContext (“/NodeList/*/DeviceList/*/MacTx”, MakeCallback (&BandwidthCallback));

// Install flow monitor to capture performance metrics

FlowMonitorHelper flowHelper;

Ptr<FlowMonitor> flowMonitor = flowHelper.InstallAll ();

Simulator::Stop (Seconds (11.0));

Simulator::Run ();

CalculateNetworkGovernance ();

Simulator::Destroy ();

return 0;

}

Explanation

  1. Setup:

Created four nodes : two clients and two servers. Those nodes are connected by point-to-point links.

  1. Internet Stack and Routing:

On all nodes, the internet stack is installed and global routing is enabled.

  1. Applications:

On sever nodes (nodes 2 and 3), a UDP server is installed, and a UDP client is installed on client nodes (nodes 0 and 1)  to generate traffic.

  1. Governance Policies:

To trace packet transmissions, The TxCallback, RxCallback, DropCallback, and BandwidthCallback functions are connected.

  1. Network Governance Calculation:

The CalculateNetworkGovernance function checks compliance with a simple bandwidth policy (maximum 5 Mbps) and logs the results for each node.

Running the Simulation

Compile and run the simulation by using the following commands:

./waf configure

./waf build

./waf –run your-script-name

Replace your-script-name with the actual name of your script file.

On the whole we had a performance analysis on calculating network governance in ns3 by implementing and monitoring policies, procedures, and controls to manage and regulate network behavior. Also, we provide more related content on Network Governance.Kindly provide ns3simulation.com with all the specific details of your parameters concerning Network Governance, and we will furnish you with innovative outcomes. If you are seeking guidance from networking experts to enhance performance, please do not hesitate to contact our team.