Category: GNS3

GNS3 (Graphical Network Simulator-3) is a powerful tool used for network simulations and testing and is exceptionally compatible with Cisco devices. In this category, you can find comprehensive guides about GNS3, installation and configuration steps, techniques for creating and simulating virtual network topologies with Cisco devices, performance improvement tips, troubleshooting methods, and information about the various features offered by GNS3. You can test and optimize your network infrastructure in a virtual environment by using GNS3 effectively with Cisco routers, switches, and other network devices. You can find all the information you need here and manage network simulations more efficiently.

How to Install GNS3 on macOS & Mac

Are you running macOS 14 Sonoma on your Mac PC and want to install GNS3? Then, let’s welcome you to our professional guide and start installing GNS3.

First of all, I want to give you some information: network engineers, students preparing for Cisco exams, or anyone can use GNS3. In this article, I will tell you everything from downloading and installing the software to adding Cisco IOS.

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How to Configure Spanning Tree on Cisco Switch in GNS3

The Spanning Tree Protocol (STP) in computer networking stops loops in the network setup. It’s vital for keeping the network stable and preventing broadcast storms. It works by specifying a single “root” bridge and then turning off connections that might cause loops. So, STP is a protocol we commonly use. However, it can be a little tricky to configure.

In this article, we’ll show you how to configure the Spanning Tree Protocol on a Layer 2 Switch. We’ll use GNS3, a network simulation tool, to do it. We’ll look at essential features like PortFast, BPDU guard, and root guard. After that, we’ll show you how to set it up to work with VPCS computers.

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How to Import an Appliance in GNS3

In this article, we’re going to explore importing an L2 appliance to GNS3. Cisco IOU (IOS on Unix) is like a pretend version of Cisco IOS that runs on Unix-type operating systems. It lets network engineers try out complex network setups and test different situations without having real hardware.

When you add an appliance to GNS3, you can make more realistic and advanced network simulations, including make-believe versions of Cisco switches and routers. We’ll guide you through each step, explaining how to download, install, and set up GNS3 to use the L2 appliance.

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Cisco IOS Download for GNS3

GNS3 is a trendy tool for preparing for Cisco exams. To emulate the use of network devices like routers and switches on GNS3, you need to download Cisco IOS images.

So, these images are essential for making sure you can do the same things with Cisco devices in a virtual world.

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How to Enable and Configure PortFast on Cisco Switch in GNS3

Today, lots of companies use computer networks a whole bunch. The folks who manage these LANs have to make sure they’re fast, dependable, and safe. One way to do this is by setting up switches with the Spanning Tree Protocol (STP).

When a switch port breaks and causes STP to stop working, it can be a big issue. PortFast helps fix this. In this guide, we’ll explain how to enable and configure PortFast on a Layer 2 switch using GNS3.

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How to Configure Root Bridge on Cisco Switch in GNS3

Are you curious about setting up a Layer 2 Switch as the Root Bridge in your network on GNS3? Usually, devices sort out the Root device using a Spanning Tree. But we can set it manually on Cisco Switches. How? We check out MAC addresses, Priority values, and Cost values.

But sometimes, it’s a good idea to pick the Root Switch ourselves. So, in this article, we’ll choose a Switch manually using the Priority value. Let’s begin!

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How STP (Spanning Tree Protocol) Works?

In computer networks, the Spanning Tree Protocol (STP) stops loops. In this article, we’ll look at how STP works on Layer 2 Switches with GNS3.

We’ll explore the selection of Designated, Root, and Blocked Ports. Plus, we’ll go over setting up STP and analyzing packets with Wireshark. If you want to know more about this protocol, keep reading!

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