GNS3 Fundamentals (Official Course) Part 1
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GNS3 Fundamentals (Official Course) Part 1

Interactive GNS3 Training!
4.6 (51 ratings)
Instead of using a simple lifetime average, Udemy calculates a course's star rating by considering a number of different factors such as the number of ratings, the age of ratings, and the likelihood of fraudulent ratings.
349 students enrolled
Created by David Bombal
Last updated 5/2017
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  • Certificate of Completion
What Will I Learn?
  • Run Cisco IOS images on your laptop!
  • Prepare for CCNA lab simulations
  • Download, install and configure GNS3 on a Windows PC
  • Use Cumulus VX with GNS3
  • Use GNS3 Virtual machines for VirtualBox, VMware Workstation and ESXi
View Curriculum
  • You need your own Cisco IOS for this course

The Official GNS3 Fundamentals Course: Created with the GNS3 Developers!

MAJOR UPDATE: GNS3 have released version 2.0. I have now added a lot of content about GNS3 2.0 to the course.

If you have not used GNS3 before, then this course is for you! Learn how to download, install and configure GNS3 on a Windows PC. 

Learn the basics (and some advanced topics) of GNS3 including:

> Understand why you would use GNS3 and the differences between emulating and simulating network devices

> Getting started with the software from soup to nuts including: IOS selection, hardware requirement, switching support, install of the new GNS3 VM with VMware & ESXi, getting familiar with the GUI and icons and more!

> Get Access to some amazing FREE tools that complement and work well with GNS3 including Solarwinds Response Time Viewer which helps to quickly analyze Wireshark packet capture files to troubleshoot performance issues.

Who is the target audience?
  • Anyone preparing for the CCNA exam
  • Anyone wanting to learn more about GNS3
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Curriculum For This Course
Expand All 201 Lectures Collapse All 201 Lectures 18:19:48
1 Lecture 01:31
Menu of topics in the course
1 Lecture 00:39

GNS3 Fundamentals Course Topics 

GNS3 Overview:

Why use GNS3?

GNS3- Emulation options

Can GNS3 run on a server?

Who uses GNS3?

GNS3 Hardware requirements

GNS3: Hardware requirements

Emulated versus Simulated devices

GNS3 Emulated versus Simulated devices

IOS Image selection

Which IOS image should I use?

Switching support

What about switches? Does GNS3 support switching?

Troubleshooting Part 1: View this first

Troubleshooting Introduction

AntiVirus issues

GNS3 Doctor

Troubleshooting Part 2: Memory and router crashes

Router crashes because of lack of memory - make sure to check Cisco's website

IMPORTANT: Recommendations (GNS3 VM versus Dynamips)

Should you be using the GNS3 VM?

Installation and setup of GNS3 (Dynamips install)

GNS3 download (Windows)

GNS3 Installation (Windows Dynamips)

Setup Wizard

Let the fun begin! You first GNS3 topology

Enable OSPF routing

GNS3 VM - what should I download?

Do I need the GNS3 all-in-one file and the VM?

Installation of GNS3 using the GNS3 VM

GNS VM download

VirtualBox import

Setup Wizard

Setup wizard (continued)

GNS3 VM router setup

GNS3 VM and OSPF demonstration

Local server and Local GNS3 VM demonstration


GNS3 VMware VM

VMware Workstation GNS3 VM

GNS3 GUI Part 1: Workspace and others

GNS3 Workspace

GNS3 Topology Summary

Server Summary

GNS3 console

GNS3 Menu Overview

GNS3 GUI Part 2: Projects

GNS3 Projects

GNS3 Project Terminology

GNS3 GUI Part 3: Snapshots


Snapshots (continued)

GNS3 GUI Part 4: More GUI Options & demonstrations

Interface labels

Console connect to all devices

Start, suspend and stop routers - EIGRP convergence demostration

Pause Router Demo with EIGRP demonstration

Notes, Pictures, Zoom, Ellipses, Rectangles, Layers

GNS3 Styles

VPCS - lightweight PCs

VPCS overview

Cisco Router and VPCS PCs

Router on a stick (IOS router and GNS3 Layer 2 switch)

Router on a stick overview

Create topology

Router configuration (subinterfaces)

Wireshark capture of 802.1Q frames

GNS3 Hub, Switch, Wireshark captures (including password capturing)

Ethernet Hub, switch and Wireshark captures

Password captures using GNS3 hub and Wireshark

Ethernet Switch and Wireshark captures of 802.1Q frames

Cisco Etherswitch Service module (Layer 2 switching)

Cisco Etherswitch Service Module Overview

Create topology

Spanning Tree, PCMCIA setup, memory setup

Format Flash and set up VTP

Verify PC Connectivity

Spanning Tree testing

Move PCs to another VLAN

GNS3 Etherswitch Wizard

GNS3 Macros

GNS3 Frame Relay switch

Frame Relay Overview

Build a Frame Relay network

OSPF neighbors across Frame Relay

Cisco IOS router as a Frame Relay switch

Cisco Router as Frame Relay switch Cisco Router as Frame Relay switch configuration

Frame Relay testing

Connect GNS3 to the Internet and enable NAT

Internet and NAT overview

Topology creation and cloud Topology creation and cloud configuration

GNS3 can ping Internet websites & NAT configuration

NAT terminology

Wireshark capture of NAT packets

Solarwinds Free Tools

Solarwinds Repsonse Time Viewer

Solarwinds TFTP server

Cumulus VX (Linux Networking Operating System)

Cumulus VX Introduction

Cumulus VX FAQs

Cumulus VX Technical Documentation

Import OVA

Build Topology

Spine and Leaf

Start up and connect

Switch port configuration

Bridge configuration

SVI configuration and ping tests

Create multiple VLANs

GNS3 VM and ESXi, Amazon EC2 and VMware ESXi

Download GNS3 ESXi VM

ESXi configuration

Add IOS images and create a topology

Thank you and please give feedback

Thank you!

Topic List
Download all Content
1 Lecture 00:10
Download MP4s and Lab Guides
GNS3 Overview
4 Lectures 06:35
Why use GNS3?

GNS3 - Emulation options

Can GNS3 run on a server?

Who uses GNS3?
Lab Guides
1 Lecture 00:15
Get your GNS3 lab guides
GNS3 Hardware requirements
1 Lecture 01:26
Emulated versus Simulated devices
1 Lecture 01:08
GNS3 Emulated versus Simulated devices
IOS Image selection
1 Lecture 03:08
Which IOS image should I use?
UPDATED CONTENT: Network Operating Systems
2 Lectures 15:32
Network Operating Systems Part 1 FBOSS, NX-OS, IOSv, IOS-XRv, cEOS and many more

Network Operating Systems Part 2 FBOSS, NX-OS, IOSv, IOS-XRv, cEOS and many more
UPDATED CONTENT: Downloading VIRL images
1 Lecture 10:11
How to download Cisco IOS images and VIRL images. Which is the best and how do y
35 More Sections
About the Instructor
David Bombal
4.6 Average rating
2,431 Reviews
22,554 Students
27 Courses
CCIE #11023, over 15 years of network training experience

David Bombal (CCIE #11023 Emeritus) passed his Cisco Certified Internetwork Expert Routing and Switching exam in January 2003 and is one of a small percentage of Cisco Engineers that pass their CCIE labs on their first attempt.

David qualified as a Cisco Certified Systems Instructor (CCSI #22787) many years ago! He has been training Cisco courses for over 15 years and has delivered instructor led courses in various countries around the world covering a wide range of Cisco topics from CCNA to CCIE.

He has also personally developed Cisco engineer utilities such as the VPN Config Generator, software, training materials, EBooks, videos and other products which are used throughout the world.

David has designed, implemented and managed networks ranging from single sites to those that span 50 countries.