🌐 NetLab-Pro: Campus Network Subnet Architect & Dynamic VLSM Suite

NetLab-Pro is an interactive, production-grade IPv4 Subnetting and Campus Network Planning Suite. Built specifically for Computer Networks (CN) mini-projects, enterprise network design, and college viva demonstrations.

It runs natively on your Windows device as an interactive desktop GUI application:

• 🚀 One-Click Native Windows Desktop App (run.bat or run_gui.bat) - Built with a clean, modern white sidebar dashboard interface, real-time dynamic recalculations, interactive diagnostic tools, and in-place export generators.
• 📊 PowerPoint Presentation Deck Generator (generate_ppt.py) - Automatically creates a 12-slide widescreen presentation deck (reports/NetLab_Pro_Project_Presentation.pptx).

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🌟 Key Features & Capabilities

1. 🏢 Dynamic Campus VLSM Subnet Architect (Direct Number of Labs Input)

• Direct Number of Labs Input: Enter the total number of laboratories to provision via spinbox or quick-sizing chips (4 Labs, 6 Labs, 8 Labs, 12 Labs, 16 Labs).
• Configure N Labs Wizard: Open an interactive modal table to define exact names, departments, and workstation counts for all $N$ laboratories with instant VLSM recalculation.
• Zero Constraints: Subnet for any number of computer labs ($1$ to $32+$) and any number of computers per lab ($2$ to $10,000+$).
• Intelligent VLSM Allocation:
  • Computes minimum host bits required: $(2^h - 2) \ge \text{workstations} + \text{buffer}$.
  • Sorts all labs descending by capacity demand to eliminate address fragmentation and prevent subnet overlaps.
  • Automatically calculates power-of-2 boundary alignments (current_network % block_size == 0).
  • Real-time address exhaustion detection against the base campus network.
• Buffer & Growth Expansion: Configurable percentage expansion buffer per lab (e.g., 10% or 20% future capacity).
• Efficiency Analysis: Reports total IP wastage, allocated blocks, and percentage efficiency.

2. 🌐 CIDR Supernetting & Multi-Subnet Route Summarization Engine

• Multi-Subnet Aggregation: Aggregate multiple contiguous or disparate subnets into a single supernet prefix (e.g. four /24 subnets $\to$ one /22 supernet).
• Longest Common Prefix (LCP) Proof: Performs 32-bit bitwise XOR analysis (min_net ^ max_bcast) to find the exact bit boundary separating common prefix bits from host bits.
• Contiguity & Boundary Analysis: Validates power-of-2 subnet count, starting boundary alignment, and detects unallocated IP address leakage.
• Route Table Reduction: Automatically computes percentage routing table reduction: $((N - 1) / N) \times 100%$.
• Multi-Protocol Cisco IOS CLI Generator: Instantly outputs Cisco commands:
  • Anti-Routing-Loop Discard Static Route: ip route <net> <mask> Null0
  • OSPF Area Border Router (ABR) Summary: area 0 range <net> <mask>
  • BGP Border Gateway Aggregation: aggregate-address <net> <mask> summary-only
  • EIGRP Interface Route Summarization: ip summary-address eigrp 100 <net> <mask>
• Import Active Campus Labs: One-click button imports all active campus laboratories into the Supernetting engine.

3. 🖥️ PC-by-PC Workstation Inventory & DHCP Scope Generator

• Dynamic System Addition & Expansion: Add 1, 5, or any $N$ new systems directly to any laboratory on the fly via the ➕ Add System to Lab... wizard or inline +1 PC / +5 PCs quick-add buttons. Automatically scales up the subnet block (e.g., from /26 to /25) if capacity threshold is reached.
• For any configured lab, inspect the complete workstation-by-workstation inventory table:
  • Gateway IP (<Lab>-GW01)
  • Local Cache / DNS Server (<Lab>-SRV01)
  • Network Printer (<Lab>-PRN01)
  • Student Workstations (<Lab>-PC-01, <Lab>-PC-02, ...)
  • Spare / Expansion reserved addresses
• Computes exact DHCP pool scopes (Lease range start, range end, excluded gateway/server addresses, DNS).

3. 🔬 Deep 32-Bit Binary Visualizer & ANDing Engine

• Visualizes the complete 32-bit binary decomposition of an IPv4 address:
  • Network Bits (Cyan)
  • Subnet Borrowed Bits (Yellow)
  • Host Bits (Green)
• Step-by-step bitwise ANDing demonstration: IP & MASK = Network ID.
• Wildcard calculation: ~MASK = Wildcard Mask.
• Broadcast calculation: Network ID | Wildcard = Broadcast ID.

4. 🔍 Inter-Host Reachability & Routing Diagnostic Tool

• Test communication between any two endpoints (IP_A/CIDR_A and IP_B/CIDR_B).
• Diagnoses:
  • Direct Layer-2 Switched Path: Same subnet; resolves MAC via ARP; no router hop.
  • Layer-3 Routed Path: Distinct subnets/VLANs; packet forwarded via Default Gateway and Inter-VLAN router.
  • Asymmetric Mask Misconfiguration: Detects mismatched masks causing one-way blackholes.

5. 📜 Multi-Format Export & PowerPoint Presentation Engine

• 12-Slide PowerPoint Presentation Deck (reports/NetLab_Pro_Project_Presentation.pptx): Professional 16:9 widescreen presentation deck explaining problem statements, 4-tier system architecture, VLSM math, 8-lab case study, Cisco CLI, and viva defense Q&A.
• Cisco IOS Switch & Router Config (reports/campus_cisco.cfg): Ready to paste into Cisco Packet Tracer or a physical Cisco Catalyst L3 Switch/Router. Generates VLANs, SVIs (interface VlanX), DHCP pools, and default routes.
• CSV Spreadsheet (reports/campus_subnets.csv): Import directly into Microsoft Excel or Google Sheets.
• Engineering Report (reports/campus_report.txt): Complete formatted text report.

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🏗️ Architecture & File Structure

D:\cn mini project\
├── server.py             # Flask Web Server launching the Chrome Web Application
├── templates\
│   └── index.html        # Modern Chrome Web Interface (Tailwind CSS, Glassmorphic UI)
├── generate_ppt.py       # Human-designed 12-slide PowerPoint presentation generator
├── gui_app.py            # High-DPI Python Desktop GUI Application (Tkinter Dark Theme)
├── netlab_engine.py      # Core Python IPv4/VLSM math, diagnostics, DHCP & export engine
├── app.py                # Python Master Entry Point
├── run_chrome_app.bat    # 1-Click launcher to run Web App in Google Chrome
├── run_python_gui.bat    # 1-Click launcher for Desktop GUI Studio
├── reports\              # Generated Cisco scripts, CSVs, reports, and PPTX presentation
│   ├── NetLab_Pro_Project_Presentation.pptx
│   ├── campus_cisco.cfg
│   ├── campus_subnets.csv
│   └── campus_report.txt
├── include\              # C header files
├── src\                  # C source files
├── build.bat             # Auto-detects GCC or MSVC cl.exe and compiles C editions
├── run_gui.bat           # 1-Click launcher for Chrome Web App
└── run.bat               # 1-Click launcher for Terminal TUI

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⚡ How to Run On Your Device

1. Master Launcher (All Modes)

Double-click run.bat or run:

run.bat

This presents a clean menu to launch:

1. Modern Web Application (Recommended): Runs on http://localhost:5000 with interactive 4-tier network topology, live search, CIDR supernetting, 32-bit binary visualizer, reachability diagnostics, and viva defense quiz.
2. Native Desktop GUI Studio: High-DPI Windows Tkinter application with live recalculations.
3. Interactive Terminal CLI: Command-line prompt wizard.
4. PowerPoint Presentation Deck Generator: Generates reports/NetLab_Pro_Project_Presentation.pptx.

2. Direct Web Application Launcher

Double-click run_chrome_app.bat or run:

python server.py

• Opens automatically in Google Chrome / your default browser at http://localhost:5000.
• Full suite of 8 interactive tabs, real-time live search, dynamic subnet scale buttons (+1 PC, +5 PCs), edit modal, address utilization bar, interactive Vis.js 4-tier topology, multi-protocol Cisco CLI generation, and instant downloads.

3. Direct Native Desktop GUI Launcher

Double-click run_gui.bat (or run_python_gui.bat) or run:

python gui_app.py

4. Interactive Terminal Wizard (CLI Input Mode)

Double-click run_cli.bat or run:

python interactive_cli.py

5. Generate 12-Slide PowerPoint Presentation Deck

Run:

python generate_ppt.py