GNS3 2.1 Install and configuration on Windows 10 (Part 4): Basic GNS3 Network (your first network)

This video explains and demonstrates how to create your first GNS3 network in GNS3. This is one of multiple videos showing you how to install the GNS3 Windows GUI on a Windows 10 PC.


In the previous video in this series, I showed you how to download and install GNS3 on a Windows 10 computer.

Now that we’ve got GNS3 installed, let’s start it up and create our first GNS3 topology.
When GNS3 starts up for the first time, we see the setup wizard. I’m not going to use this wizard, so I’m going to click cancel.

The GNS3 software now starts up and as we can see here, it’s successfully
started. I’m going to click file, new blank project to start my first GNS3 project. So call this anything you want.

My project files are by default stored here. You can change the location of the files if you want to. Click OK

The GNS3 GUI consists of various components. On the left hand side, we can browse for various devices in our GNS3 topology. As an example, if I click browse routers, I can see available appliances, installed appliances and installed and available appliances. By default no appliances are installed.

But I can install various appliances from the GNS3 marketplace by simply dragging them to the workspace in GNS3. This white area is called the GNS3 workspace.

I can also look at various switches by default. I have an ATM switch Ethernet, hub Ethernet switch and frame relay switch installed. But various other switches are available under End devices. I have a cloud, net cloud and VPCS installed by default. But again, there are many End devices available from the GNS3 marketplace.

I can also browse security devices by default. No security appliances are installed, but many are available including the Cisco ASAV. Browse all devices, shows me all devices that are available. At the moment these are the devices that I have installed. But as you can see here, there is a long list of devices that can
be installed in GNS3. So I’m going to go to installed devices.

And to start off with, I’m going to create a very basic GNS3 topology consisting of one Ethernet switch and two VPCS devices. VPCS devices are very basic PCs that you can use to test your GNS3 installation. The add a link button allows you to add connections to your GNS3 topology. I’m then going to add a link from the VPCS devices to the Ethernet switch.

In subsequent videos, I’ll show you how to add a Cisco IOS image to your GNS3 topologies but initially all I want to do is test that GNS3 is installed correctly. You can move devices around in your topology. You can show interface labels, you can also add various notes to your topology to make it look nicer.

So move things around and change the look and feel as you like. As an example, you could go to edit, preferences and change the style of your GNS3. Some screenshots that you see on internet may look like this. Windows by default uses the classic GNS3 style which looks like this.

Now in subsequent videos, I’ll show you how to create a more complex GNS3 topologies. But initially, all we want to do here is prove that GNS3 has installed properly and that you can get your GNS3 working on your computer using a basic GNS3 topology. What I’m going to do now is start up the devices in my GNS3 topology and open up consoles to the devices.

Now even though the Ethernet switch has a console, we’re not going to initially configure that. So what I’m going to do is do some basic configuration on my VPCS PCs. To make this easier to read, I’m going to
change the putty settings. So I’ll make this bigger, so that it’s easier to read.

So here’s PC1 and I’ll do something similar on PC2. Change the appearance of the console

Okay, so PC1 PC2. On PC1, I’ll configure an IP address of with a /24 mask

I’ll do something similar on PC2 to IP address 10:1.1.2 / 24 mask

Now that that’s been done, I should be able to ping from one PC to the other.
So on PC2 – can I ping PC1? The answer is yes I can.

On PC1 can I ping PC2 – yes I can.

So I’ve proven now that GNS3 has installed successfully. I can start it up and create a project, add devices to my GNS3 topology. Configure them and get to them to talk to one another. That’s the first thing you want to do when you install GNS3 for the first time. Just prove that a basic install of GNS3 works. Once you’ve done this, you can extend your GNS3 topologies. I’ll drag a third PC to the topology and connect it to the Ethernet switch.

I’ll right-click on the device and click start to start it up, right-click, click console to open up a console to the PC. I’ll change the console settings and I’ll configure this PC with an IP address of 10.1.1. 3 /24 mask

And let’s verify whether it can ping PC1 – it can. What about PC2? It can….

Discounted link to course here:

  • David Bombal