CISCO-VIP-NETWORKING-INTERNSHIP-2025

🛰️ Auto Topology Generation & Network Simulation Tool

Cisco Virtual Internship Program 2025 – Networking Problem Statement
A powerful automation tool to parse network configurations, generate topologies, validate setups, and simulate network performance & failures.

📖 Overview

This project automates the end-to-end process of network topology creation and simulation.
It parses router, switch, and endpoint configurations, constructs a hierarchical topology, validates configuration compliance with industry best practices, and tests performance through detailed simulations.

The solution is designed to meet all Cisco Internship Tool Requirements and provides an optimized framework for modern network design, troubleshooting, and scalability analysis.

✨ Key Features

🔹 Auto Topology Generation

Parses .txt configuration files for routers, switches, and PCs.
Extracts:
- Interface details (IPv4 addressing, MTU, bandwidth)
- Routing protocols (OSPF, BGP)
- VLAN configurations
- Link relationships
Builds an accurate hierarchical network topology.
Generates visual layout from extracted data.

🔹 Configuration Validation & Optimization

Detects:
- Missing configuration components
- Duplicate IP addresses in subnet
- VLAN inconsistencies
- Incorrect gateway assignments
- MTU mismatches
- Network loops
Suggests:
- Routing protocol changes (e.g., OSPF → BGP for scalability)
- Node aggregation opportunities

🔹 Load Management & Traffic Awareness

Analyzes bandwidth usage from configs.
Estimates traffic loads per application type.
Flags overloaded links & suggests balancing.
Provides fallback paths for low-priority traffic.

🔹 Simulation & Fault Injection

Day-1 Simulation Includes:

Device bring-up
ARP table population
OSPF/BGP neighbor discovery
MTU mismatch impact testing

Day-2 Simulation Includes:

Link failure injection & recovery
Routing table reconvergence
Compliance checks (31 tests in current run)
Performance degradation analysis

🔹 Advanced Simulation Engine

Multithreaded architecture (each network element runs in parallel).
IPC communication using TCP/FIFO sockets.
Pause and Resume simulation on demand.
Per-node logging for complete visibility.

📁 Repository Structure

📦 AutoTopology-Network-Sim ┣ 📂 Config/ # Input configuration files ┃ ┣ R1.txt ┃ ┣ S1.txt ┃ ┗ ... ┣ 📂 simulation_engine/ # Simulation core logic ┣ 📂 topology_generator/ # Parser and graph builder ┣ 📂 validation_module/ # Rules and optimization checks ┣ 📂 reports/ # Generated analysis & results ┣ main.py # Entry point ┣ requirements.txt # Python dependencies ┗ README.md # Documentation

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🔧 Installation

Requirements:

Python 3.9+
pip package manager

Clone Repository: git clone https://github.comroshankumar0036singh/CISCO-VIP-NETWORKING-2025.git cd AutoTopology-Network-Sim text

Install Dependencies: pip install -r requirements.txt

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🚀 Usage

1️⃣ Prepare Configuration Files

Place device configs in the Config/ directory.
Sample configs are available here:
Google Drive - Input Configs

2️⃣ Generate Network Topology

python main.py --generate-topology

text Outputs:

reports/network_topology_<timestamp>.html (Interactive Graph)
JSON topology data

3️⃣ Validate Configurations

python main.py --validate-config

4️⃣ Run Simulations

Day-1 Simulation: python main.py --simulate --day 1

Day-2 Simulation (Fault Tests): python main.py --simulate --day 2

5️⃣ Pause / Resume Simulation

python main.py --pause python main.py --resume

📊 Example Output

Network Bring-Up
- ✔ All devices up and stable
- ✔ ARP tables populated
- ✔ OSPF/BGP neighbors formed
Day-2 Tests
- Total tests: 31
- Pass: 85
- Fail: 10
- Warnings: 5
- Example Fault Injection:
  - Broken link R1 ↔ R2 → Network uptime maintained
  - Broken link R1 ↔ S1 → Automatic path adaptation
Reports Generated:
- JSON detailed analysis
- Interactive HTML topology
- Per-node simulation logs

✅ Cisco Internship Compliance

✔ Hierarchical topology creation
✔ Bandwidth analysis/capacity verification
✔ Load-balancing strategy recommendation
✔ Missing component detection
✔ Configuration checks & duplicate IP detection
✔ VLAN & gateway validation
✔ Routing protocol recommendations
✔ MTU mismatch and network loop detection
✔ Day-1 & Day-2 scenario execution
✔ Fault injection testing & recovery analysis
✔ Pause/Resume live simulation
✔ Multithreaded architecture with IPC