How to Set Up GNS3 with FRRouting (FRR) – A Free & Legal Home Lab for BGP, OSPF, and VXLAN
By Fathalla Ramadan | March 2026 If you’ve outgrown Cisco Packet Tracer and want to practice real BGP, OSPF, IS-IS, or even VXLAN-like overlays—but don’t have access to Cisco IOS or a corporate lab—this guide is for you. You’ll learn how to build a free, legal, and sustainable home lab using GNS3 + FRRouting (FRR)—an […]
From Packet Tracer to GNS3: When to Make the Switch (2026 Guide)
If you’ve been learning networking with Cisco Packet Tracer, you’re on the right path. It’s free, beginner-friendly, and perfect for mastering CCNA fundamentals. But at some point, you’ll hit its limits! and wonder: “Should I move to GNS3? And when?” After training engineers across Egypt, Saudi Arabia, and Bahrain for over 35 years, I’ve seen […]
How to Add Windows VMs to GNS3 (Step-by-Step for CCNA Labs)
By Fathalla RamadanMarch 2026 Tested on Windows 10/11 with VirtualBox – Free & Legal If you want to build realistic enterprise labs—like a client PC talking to a Windows Server through a Cisco router, you can add Windows VM to GNS3. This guide shows you how using free tools only, no piracy. Works with Windows […]
Cisco IOS in GNS3: What’s Legal, What’s Available (2026)
By Fathalla RamadanMarch 2026 Many CCNA learners ask: “Can I run real Cisco IOS in GNS3 using free images from Cisco DevNet?” The short answer: It’s complicated—and the landscape has changed. In this guide, I’ll clarify: This isn’t the “easy download” post you might hope for—but it’s the truth, based on testing and Cisco’s current […]
How to Fix GNS3 Nested Virtualization on Windows 11 (Step-by-Step)
By Fathalla RamadanFebruary 2026 If you’ve installed GNS3 on Windows 11, launched a router—and seen it stuck at “Starting” or showing “Nested virtualization not available”—you’re not alone. This is one of the most frequent issues I hear from students in Cairo, Riyadh, Manama, and beyond. The good news? It’s not your fault, and it’s 100% […]
Lab 14.1: BGP Multi-Homing Simulation in GNS3 (Step-by-Step)
By Fathalla RamadanMarch 2026 How do enterprises stay online when one ISP fails?The answer: BGP multi-homing. In this lab, you’ll simulate a realistic dual-ISP architecture—just like those used by banks, cloud providers, and critical infrastructure worldwide. You’ll configure an Enterprise-Edge router to connect to two ISPs, advertise its internal network, and maintain connectivity even if […]