How to Begin Implement ISP Protocols in NS3

To stimulate an Internet Service Provider (ISP) protocols in NS3 has needs a perfect understanding for protocols we request to replicate, as well as familiarity by ns3 modular design. Here’s a step-by-step guide to get you started:

Steps to Begin Implement ISP Protocols in NS3

Step 1: Install and Set Up NS-3

1. Download NS-3:
   • Visit the NS-3 official website and download the latest stable release.
   • Alternatively, clone the repository:

git clone https://gitlab.com/nsnam/ns-3-dev.git

cd ns-3-dev

./ns3 configure –enable-examples –enable-tests

./ns3 build

1. Verify the Installation:
   • Process for a simple sample to assure the installation is correct:

./ns3 run examples/tutorial/first.cc

Step 2: Understand ISP Protocols

Include commonly the ISP protocols:

• Routing Protocols: BGP (Border Gateway Protocol), OSPF (Open Shortest Path First), etc.
• Traffic Management: Congestion pattern, QoS enforcement, etc.
• Authentication and Access Control: PPP, RADIUS, TACACS+.

Choose the detailed protocol(s) to execute and recognize their functionality.

Step 3: Plan Your Implementation

• Define Objectives: What features for the ISP protocol do you need to replicate? For sample, BGP route broadcast, QoS policies, or congestion load balancing.
• Check Existing NS-3 Modules: Particular protocols can be already having incomplete or complete executions. For sample:
  • BGP and routing: Look into ns3/internet and ns3/routing.
  • QoS: Study the ns3/net-device and ns3/traffic-control.

Step 4: Implement ISP Protocols

1. Add New Protocols or Extend Existing Ones:
   • Generate a new protocol if not possible for NS-3.
   • Encompass the existing classes in the src directory for changes.
2. Coding Steps:
   • Header File: Express the protocol class, states, and techniques in the header file (.h).
   • Source File: Apply the functionality in the source file (.cc).
   • Integration: Save the protocol with NS3’s TypeId system for replicate the incorporation.

Example structure for a new protocol:

// In MyIspProtocol.h

class MyIspProtocol : public ns3::Application {

public:

static TypeId GetTypeId(void);

void Setup(Ptr<Socket> socket, Address address);

protected:

virtual void StartApplication(void);

virtual void StopApplication(void);

private:

void HandleRead(Ptr<Socket> socket);

Ptr<Socket> m_socket;

};

1. Compile the Changes:
   • Enhance the new files to the wscript file of the respective components.
   • Recreate a tool ns3:

./ns3 build

Step 5: Create and Run Simulations

1. Write a Simulation Script: Use NS3’s tool for replicate a framework to experiment the protocol. Example:

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

NodeContainer nodes;

nodes.Create(2);

InternetStackHelper stack;

stack.Install(nodes);

PointToPointHelper pointToPoint;

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

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

NetDeviceContainer devices;

devices = pointToPoint.Install(nodes);

Ipv4AddressHelper address;

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

Ipv4InterfaceContainer interfaces = address.Assign(devices);

ApplicationContainer apps;

Ptr<MyIspProtocol> ispApp = CreateObject<MyIspProtocol>();

apps.Add(ispApp);

apps.Start(Seconds(1.0));

apps.Stop(Seconds(10.0));

Simulator::Run();

Simulator::Destroy();

return 0;

}

1. Run the Simulation:

./ns3 run my-simulation

Step 6: Validate and Analyze

• Use the NS3’s logging and tracing the abilities for debug and validate the protocol behavior.
• It gathers the statistics using tools such as FlowMonitor or output custom logs.

Step 7: Optimize and Document

• Enhance the code for scalability for sample simulates larger networks.
• Document the protocol’s functionality, challenges, and outcomes.

In this process, we had detailed covered the information about Internet Service Provider simulation procedures and evaluation process of Internet Service Provider outcomes across the ns3 tool. Additional specifics concerning the Internet Service Provider will be provided in upcoming manuals.