How to Calculate Network Risk Management in Ns3

To calculate Network risk management in ns3, there are several steps needs to follow, for identifying, assessing, and mitigating risks that are related with the network operations such as implementing security measures, monitoring network performance, and evaluating the impact of potential threats or failures. The following steps will guide on how to simulate and calculate network risk management in ns3.

Steps to Simulate and Calculate Network Risk Management in NS3

1. Set Up the NS-3 Environment:
   • Make sure ns3 is installed and properly configured.
2. Define the Network Topology:
   • Create a network topology with nodes representing clients, servers, and intermediary nodes like routers or switches.
3. Implement Risk Management Policies:
   • Define and implement policies such as traffic filtering, redundancy, failover mechanisms, and intrusion detection.
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 events such as packet transmissions, receptions, drops, and failures.
6. Analyze Risk Management Data:
   • Collect and analyze the logged data to assess network risks and the effectiveness of the implemented policies.

Example Code

The example given below logs packet transmissions, receptions, and drops, and simulates a failover mechanism to calculate the network risk management 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 (“NetworkRiskManagementExample”);

std::map<uint32_t, uint64_t> packetsSent;

std::map<uint32_t, uint64_t> packetsReceived;

std::map<uint32_t, uint64_t> packetsDropped;

bool primaryLinkActive = true;

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 FailoverMechanism ()

{

if (primaryLinkActive)

{

NS_LOG_UNCOND (“Primary link failure detected, switching to backup link.”);

primaryLinkActive = false;

// Here you can implement the logic to switch to the backup link.

}

}

void CalculateNetworkRiskManagement ()

{

NS_LOG_UNCOND (“Network Risk Management 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];

 

NS_LOG_UNCOND (“Node ” << nodeId << “: Packets Sent = ” << sent << “, Packets Received = ” << received << “, Packets Dropped = ” << dropped);

}

}

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)));

// Backup link for failover

PointToPointHelper backupPointToPoint;

backupPointToPoint.SetDeviceAttribute (“DataRate”, StringValue (“5Mbps”));

backupPointToPoint.SetChannelAttribute (“Delay”, StringValue (“4ms”));

NetDeviceContainer backupDevices = backupPointToPoint.Install (NodeContainer (nodes.Get (0), 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);

address.SetBase (“10.1.4.0”, “255.255.255.0”);

Ipv4InterfaceContainer backupInterfaces = address.Assign (backupDevices);

// 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, and drops

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));

// Install flow monitor to capture performance metrics

FlowMonitorHelper flowHelper;

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

// Simulate a link failure at 5 seconds

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

Simulator::Stop (Seconds (11.0));

Simulator::Run ();

CalculateNetworkRiskManagement ();

Simulator::Destroy ();

return 0;

}

Explanation

1. Setup: The code sets up a network topology with four nodes: two clients and two servers, connected by point-to-point links. A backup link is also created for failover.
2. Internet Stack and Routing: The internet stack is installed on all nodes, and global routing is enabled.
3. Applications: UDP servers are installed on the server nodes (nodes 2 and 3), and UDP clients are installed on the client nodes (nodes 0 and 1) to generate traffic.
4. Governance Policies: The TxCallback, RxCallback, and DropCallback functions are connected to trace packet transmissions, receptions, and drops. These functions update counters for each node.
5. Failover Mechanism: The FailoverMechanism function simulates a failover by switching to a backup link when a primary link failure is detected.
6. Network Risk Management Calculation: The CalculateNetworkRiskManagement function logs the number of packets sent, received, and dropped by each node.

Running the Simulation

Compile and run the simulation using the following commands in your NS-3 environment:

./waf configure

./waf build

./waf –run your-script-name

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

From the given above example we all get to know how to calculate network risk management in ns3by collecting and analyzing the logged data to assess network risks.

To calculate the Network Risk Management within the Network Scenario 3 of your project, please adhere to the steps outlined above. Should you encounter any difficulties, we kindly request that you share your specific parameters with us. We will then provide you with the most optimal results.