🖧 Cisco Labs

Browser-based Cisco IOS CLI simulator for CCNA / CCNP lab practice

Free virtual lab environment — practice config, troubleshoot, save scenarios. Runs in any browser.

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🏛️ Built by Networkers Home

A virtual Cisco lab environment built by Networkers Home — India's leading Cisco + cybersecurity training institute (Bengaluru, since 2005). Used by students in our CCNA, CCNP Enterprise, and CCIE Enterprise programs to practice between live lab sessions on real Cisco hardware.

Want hands-on lab access on real Cisco gear? Networkers Home runs 24×7 lab access at the HSR Layout campus. Real Cisco/Palo Alto/Fortinet hardware. Book a demo class →

Compare top training institutes: Top 10 CCNA Bangalore · Top 10 CCNP Enterprise · Top 10 CCIE Security India · Top 10 CCIE Enterprise India

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✨ Features

• Topology Engine — drag-and-drop device placement, link connections
• Simulation Engine — event-driven packet processing (ARP, ICMP)
• Cisco-style CLI parser — hierarchical modes (User EXEC → Privileged EXEC → Config → Interface)
• Konva.js canvas — zoom, pan, real-time visualization
• Web Workers — non-blocking simulation in a separate thread
• No real device emulation — pure logical simulation, runs anywhere

🎯 Who this is for

• CCNA candidates building exam muscle memory for 200-301
• CCNP Enterprise candidates practicing OSPF, BGP, EIGRP, VLAN configs
• Networking instructors — free classroom lab tool
• Self-learners without access to physical Cisco gear

📚 Learn the underlying skills

The simulator is a practice tool, not a course. To go from "I can type commands" to "I can troubleshoot a production network at 2am," train with experts:

Goal	Networkers Home program
Pass CCNA 200-301	CCNA course in Bangalore
Pass CCNP Enterprise	CCNP Enterprise course
Pass CCIE Enterprise lab	CCIE Enterprise course
Career as network engineer	Network Engineering program
Online study (anywhere in India)	All NH courses (online + offline)

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Supported Cisco Commands

User EXEC Mode (>)

• enable — enter privileged EXEC mode
• help — show available commands

Privileged EXEC Mode (#)

• disable, configure terminal, show version, show running-config, show startup-config
• show ip interface brief, show interfaces [name], show ip route, show arp, show mac address-table
• ping <ip>, write memory, copy running-config startup-config, erase startup-config, reload

Global Configuration Mode (config)#

• hostname <name>, interface <name>, ip route <network> <mask> <nextHop>, no ip route ...
• end, exit

Interface Configuration Mode (config-if)#

• ip address <ip> <mask>, no ip address
• shutdown, no shutdown, description <text>, no description, exit

🚀 Quick Start

Prerequisites

• Docker Desktop OR Node.js 18+

Using Docker (Recommended)

docker-compose up -d
open http://localhost:3000

Local Development

npm install
npm run dev
open http://localhost:3000

Production Build

npm install
npm run build
npm start

🏗️ Architecture

Same hub-and-spoke design as a typical real-time simulator: React UI layer talks to a Zustand store, which posts messages to a Web Worker that runs the topology + simulation + CLI engines off the main thread (so the canvas stays smooth).

🧪 Testing

npm test
npm run test:watch

🤝 Contributing

PRs welcome — for major changes please open an issue first.

📜 License

MIT

🙏 Built With

Next.js · Konva.js · Zustand · xterm.js · TypeScript

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🏛️ Want to learn networking the right way?

Networkers Home — Bengaluru's leading Cisco + cybersecurity training institute since 2005. 20,000+ alumni placed · 800+ hiring partners · 100% placement guarantee.

Free demo class · Placement record · Talk to a counsellor