IS-IS Routing Protocol Simulator

A Python-based interactive simulator for the Intermediate System to Intermediate System (IS-IS) routing protocol. This tool allows network engineers and students to understand and experiment with IS-IS routing concepts through a user-friendly interface.

Project Description

The IS-IS Routing Protocol Simulator is an educational tool designed to demonstrate the fundamental concepts of IS-IS routing. It provides a simplified implementation of IS-IS routing mechanisms, allowing users to create network topologies, establish router relationships, and visualize routing decisions in real-time.

Features

• 🌐 Interactive network topology creation
• 🔄 Support for Level 1 and Level 2 routers
• 📊 Dynamic routing table calculation using Dijkstra's algorithm
• 🔗 Custom link cost configuration
• 📈 Real-time network visualization
• 💻 User-friendly command-line interface
• 🗺️ Routing table display and management

Technologies Used

• Python 3.x
• NetworkX (for graph operations and visualization)
• Matplotlib (for network topology visualization)
• Type hints (for better code documentation)

Installation

1. Clone the repository.
2. Create a virtual environment (optional but recommended).
3. Install required dependencies, i.e matplotlib.

Usage

1. Start the simulator.
2. Use the interactive menu to:
   • Add routers to the network
   • Create links between routers
   • Calculate routes
   • View routing tables
   • Visualize the network topology

Example Program Flow:

1. Add routers using option 1
2. Create links between routers using option 2
3. Calculate routes using option 3
4. View the routing tables using option 4
5. Visualize the network using option 5

Programmatic Usage

Create a new network

network = ISISNetwork()

Add routers

network.add_router("R1", level=2) network.add_router("R2", level=2) network.add_router("R3", level=2)

Add links

network.add_link("R1", "R2", cost=1) network.add_link("R2", "R3", cost=1)

Calculate routes

network.calculate_shortest_paths()

Visualize the network

network.visualize_network()

Project Structure

isis-routing-simulator/ ├── isis_simulator.py # Core simulator implementation ├── isis_simulator_cli.py # Command-line interface └── README.md # Project documentation

• isis_simulator.py: Contains the core classes (ISISRouter and ISISNetwork)
• isis_simulator_cli.py: Provides the interactive command-line interface

Contributing

Contributions are welcome! Please follow these steps:

1. Fork the repository
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

For major changes, please open an issue first to discuss what you would like to change.

Roadmap

• Area support and level-specific routing
• LSP generation and flooding
• Dynamic neighbor discovery
• Authentication mechanisms
• Multiple metrics support
• Route summarization
• GUI interface

License

This project is licensed under the MIT License - see the LICENSE file for details.

Contact

Mweetwa Nketani - @mnketani

Project Link: https://github.com/N3gus/IS_IS

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