You can gain experience by designing network topologies on GNS3 or use IOS images of real Cisco devices. By adding IOU devices to your network project, you can use the Cisco Layer 2 Switch and Layer 3 Switch.
How to Add IOU to GNS3 Server
You can easily use real Cisco Switch IOS in the GNS3 program. However, in order to fully utilize the Switches you add, you need to use IOU (IOS on Unix/Linux).
What is Cisco IOU?
First of all, let me briefly explain what IOU (IOS on Unix) is.
IOU stands for IOS on Unix / Linux. In short, they are Cisco IOS images running on Unix and Linux operating systems.
IOU functions are similar to Dynamips but use fewer resources. While Dynamips simulates the Cisco Router and Switch devices, you can add the same devices in the IOU structure.
In addition, as this structure is designed by Cisco employees for experimental purposes, it is strictly prohibited to distribute and reproduce these images to customers or any platform.
The biggest advantage of using this image is the ability to design more complex networks than Dynamips. In addition, the GNS3 VM virtual machine installed on an external drive provide more performance.
Additionally, you don’t have to fill your computer’s disk capacity with Cisco images and GNS3 projects.
Our recommendation; Inserting a high-speed SSD drive into the USB 3.0 external drive box makes it healthier and more efficient to use.
What is GNS3 VM?
In the early stages, GNS3 only simulated Cisco IOS images with Dynamips. Together with the development of the program, they provided for a solution due to Dynamips’ high resource usage while creating network designs and running GNS3 Server on the virtual machine, resulting in less resource usage.
How to Add and Run IOU Images on GNS3 Server
After briefly discussing what is IOS on Unix and GNS3 VM, let’s examine how to upload and use an image onto the server.
Once you have the necessary tools, the first thing you do is to install the GNS3 VM. Double-click the setup file to start the installation.