Learn Cisco Routing and Switching with IOU/IOL Images on Eve-ng
How to Download and Use IOU Images for EVE-NG
If you are preparing for Cisco certifications or want to practice Cisco networking technologies, you might have heard of EVE-NG. EVE-NG is a network emulator that supports virtualized commercial devices and open-source routers. One of the types of images that EVE-NG can run is IOU, which stands for IOS on Unix. In this article, we will explain what EVE-NG and IOU are, how to download and use IOU images for EVE-NG, and how to test and troubleshoot them.
What is EVE-NG?
EVE-NG stands for Emulated Virtual Environment - Next Generation. It is a clientless network emulator that provides a user interface via a browser. It allows you to create virtual networks with various devices from different vendors, such as Cisco, Juniper, Arista, Huawei, and more. You can also use Docker containers, Linux machines, Windows servers, and other tools within your network topology. EVE-NG can be used for learning, testing, proof-of-concept, or demonstration purposes.
download iou images for eve-ng
Features and benefits of EVE-NG
Some of the key features and benefits of EVE-NG are:
It supports multiple virtualization technologies, such as QEMU, KVM, Dynamips, Docker, and IOL/IOU.
It has a simple and intuitive topology designer that lets you drag and drop devices and connect them with a click.
It allows you to import and export network configurations, labs, and pictures.
It has a custom kernel that supports L2 protocols, such as STP, VTP, DTP, CDP, LLDP, etc.
It has a memory optimization feature that reduces RAM usage by sharing identical memory pages among devices.
It has a CPU watchdog feature that monitors the CPU load and stops devices that consume too much CPU resources.
It has a full HTML5 user interface that does not require any additional tools or plugins.
It supports multiuser collaboration and interaction with real networks.
It has a rich integrated text editor that allows you to edit text and objects in your lab.
It has a lab chat feature that enables communication between lab users.
It has a lab timer feature that helps you manage your self-training time.
Alternatives to EVE-NG
EVE-NG is not the only network emulator available in the market. There are some alternatives that you can also consider, such as:
Cisco Packet Tracer: a free network simulation and visualization tool for Cisco devices. It is mainly designed for CCNA level labs and scenarios.
GNS3: a free and open-source network simulator that supports multiple vendors and platforms. It requires external hypervisors, such as VMware or VirtualBox, to run devices.
Free SNMP Agent Simulator: a freemium tool that simulates SNMP devices and traps. It can be used to test SNMP-based network management applications.
NetSim: a paid network simulator and emulator that supports Cisco, Juniper, and other devices. It has pre-built labs for various certification exams.
Dynamips: a free and open-source Cisco router emulator. It can run IOS images without any modifications What are IOU Images?
IOU stands for IOS on Unix. It is a type of image that can run Cisco IOS software on a Linux platform. IOU images are mainly used for internal testing and development purposes by Cisco engineers. They are not officially supported by Cisco for customer use. However, some authorized customers may have access to IOU images for their own testing and learning needs.
Types and versions of IOU images
There are two types of IOU images: L2 and L3. L2 images can emulate Cisco switches, while L3 images can emulate Cisco routers. Both types of images can support various features and protocols, such as VLANs, STP, OSPF, BGP, MPLS, etc. However, they may not have all the functionalities and commands of the real devices.
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The versions of IOU images are based on the IOS versions that they emulate. For example, L2-ADVENTERPRISEK9-M-15.1-20130726.bin is an IOU image that emulates IOS version 15.1 with the Advanced Enterprise feature set. The versions of IOU images may vary depending on the source and date of release.
Advantages and limitations of IOU images
Some of the advantages of using IOU images are:
They are lightweight and consume less resources than other types of images, such as QEMU or Dynamips.
They can run multiple instances on a single server without affecting the performance.
They can support L2 protocols and features that are not available in other types of images.
They can be easily integrated with EVE-NG and other network emulators.
Some of the limitations of using IOU images are:
They are not officially supported by Cisco and may have bugs or errors that are not fixed.
They require a license file to run properly, which may be difficult to obtain or generate.
They may not have all the features and commands of the real devices, especially the newer ones.
They may not be compatible with some devices or platforms that use different architectures or operating systems.
How to Download IOU Images for EVE-NG
If you want to use IOU images for EVE-NG, you need to download them from a reliable source. There are some websites that offer free or paid downloads of IOU images, such as:
[Networkhunt.com](^1^): This website provides a step-by-step guide on how to add IOU images to EVE-NG, as well as links to download various versions of L2 and L3 images.
[EVE-NG.net](^2^): This is the official website of EVE-NG, where you can find documentation, tutorials, and support for using EVE-NG. It also has a section on how to add IOU images to EVE-NG, with links to download some recommended versions of L2 and L3 images.
[YouTube.com](^3^): This is a popular video-sharing platform, where you can find many videos on how to use EVE-NG and IOU images. For example, you can watch this video by NetworkHunt that shows how to add Cisco IOL/IOU images to EVE-NG.
Steps to download IOU images
The steps to download IOU images may vary depending on the source and format of the files. However, a general procedure is as follows:
Select the type and version of the IOU image that you want to download from the source website.
Click on the download link or button and save the file to