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Gabriel Sanchez
Gabriel Sanchez

Cisco IOU/IOL Images for EVE-NG: How to Download, Install and License Them


= ; where is the name of your EVE-NG server and is the 16-digit hexadecimal license key. 5. Verify the IOL images on the EVE-NG web interface by creating a new lab and adding an IOL node. You should be able to start and configure the node without any errors. Some of the benefits of using IOL for EVE-NG are: - You can run multiple instances of IOS devices with low resource consumption. - You can simulate L2 and L3 features and functions of Cisco switches and routers. - You can prepare for Cisco certification exams or practice your networking skills. Some of the common issues with IOL for EVE-NG are: - You may encounter console freeze or packet loss issues with some versions of IOL images. - You may need to adjust the NVRAM and RAM settings of the IOL nodes to avoid configuration loss or memory errors. - You may need to update your iourc file if you change your hostname or domain name of the EVE-NG server. Some of the alternatives to IOL for EVE-NG are: - Dynamips: A software that emulates Cisco IOS routers. - QEMU: A generic and open source machine emulator that supports various network devices, including Cisco ASA, CSR1000v, NX-OSv, etc. - VMware: A virtualization platform that allows you to run virtual machines with different operating systems and applications. How to Download and Use IOL for EVE-NG




IOL stands for IOS on Linux, and it is a simulator that allows you to run Cisco IOS images on a Linux platform. EVE-NG is an emulator that supports various network devices, including IOL. By using IOL on EVE-NG, you can create and practice complex network scenarios without the need for physical hardware.




download iol for eve-ng



In this article, I will show you how to download and use IOL for EVE-NG in a few simple steps. I will also discuss some of the benefits, issues, and alternatives of using IOL for EVE-NG.


Step 1: Download the IOL images




The first step is to download the IOL images from a reliable source. You can find some links to download IOL images from the web search results below:








Note that IOL is an internal Cisco product and it can only be used by authorized customers or employees. You also need to obtain a license key to run the images.


Step 2: Upload the IOL images




The next step is to upload the IOL images to the EVE-NG server using a file transfer tool like FileZilla or WinSCP. You need to copy the images to the /opt/unetlab/addons/iol/bin/ directory on the EVE-NG server.


How to add Cisco IOU/IOL images to Eve-ng


Cisco IOL (IOS on Linux) - EVE-NG


EVE-NG - How to upload L2/L3 Cisco Switch IOU/IOL image to EVE-NG


Cisco IOU/IOL images for Eve-ng download


How to generate a license for Cisco IOU/IOL images in Eve-ng


Eve-ng supported IOU/IOL images


How to fix permissions for Cisco IOU/IOL images in Eve-ng


Cisco IOS on Linux (IOL) vs IOS on Unix (IOU) in Eve-ng


How to create NETMAP file for Cisco IOU/IOL images in Eve-ng


How to disable the phone home feature for Cisco IOU/IOL images in Eve-ng


How to practice CCIE routing and switching with Cisco IOU/IOL images in Eve-ng


How to import Cisco IOU/IOL images to Eve-ng via GUI


How to use FileZilla or WinSCP to upload Cisco IOU/IOL images to Eve-ng


How to test if Cisco IOU/IOL images can run properly in Eve-ng


How to configure L2/L3 switches and routers with Cisco IOU/IOL images in Eve-ng


How to troubleshoot common issues with Cisco IOU/IOL images in Eve-ng


How to update Cisco IOU/IOL images in Eve-ng


How to backup and restore Cisco IOU/IOL images in Eve-ng


How to connect Cisco IOU/IOL devices to external networks in Eve-ng


How to use Wireshark or tcpdump to capture packets from Cisco IOU/IOL devices in Eve-ng


How to simulate different network topologies with Cisco IOU/IOL images in Eve-ng


How to use Python scripts or Ansible playbooks to automate tasks on Cisco IOU/IOL devices in Eve-ng


How to integrate Cisco IOU/IOL devices with other network emulators or simulators in Eve-ng


How to compare the features and functions of Cisco IOU/IOL devices with real devices in Eve-ng


How to optimize the performance and memory usage of Cisco IOU/IOL devices in Eve-ng


How to enable advanced features such as MPLS, BGP, QoS, IPSec, etc. on Cisco IOU/IOL devices in Eve-ng


How to use snapshots and templates to save and load different configurations of Cisco IOU/IOL devices in Eve-ng


How to share your lab projects and scenarios with other users of Cisco IOU/IOL devices in Eve-ng


How to access the console and web interface of Cisco IOU/IOL devices in Eve-ng


How to customize the icons and labels of Cisco IOU/IOL devices in Eve-ng


How to use the built-in packet generator and traffic analyzer tools on Cisco IOU/IOL devices in Eve-ng


How to monitor the CPU, RAM, disk, and network utilization of Cisco IOU/IOL devices in Eve-ng


How to debug and troubleshoot the errors and logs of Cisco IOU/IOL devices in Eve-ng


How to upgrade or downgrade the IOS version of Cisco IOU/IOL devices in Eve-ng


How to change the hostname and domain name of the server running Eve-ng for licensing purposes of Cisco IOU/IOL devices


How to use the command line interface (CLI) or graphical user interface (GUI) of Eve-ng to manage Cisco IOU/IOL devices


How to install and configure the prerequisites and dependencies for running Cisco IOU/IOL devices in Eve-ng


How to use the help and documentation resources available for Cisco IOU/IOL devices in Eve-ng


How to secure your lab environment and prevent unauthorized access or misuse of Cisco IOU/IOL devices in Eve-ng


How to export and import your lab settings and preferences for Cisco IOU/IOL devices in Eve-ng


How to use the lab timer and scheduler features for practicing exams or timed scenarios with Cisco IOU/IOL devices in Eve-ng


How to use the lab chat and collaboration features for working with other users or instructors on Cisco IOU/IOL devices in Eve-ng


How to use the lab grading and feedback features for assessing your skills or knowledge on Cisco IOU/IOL devices in Eve-ng


How to use the lab recording and playback features for reviewing your actions or learning from others on Cisco IOU/IOL devices in Eve-ng


How to use the lab bookmarking and annotation features for organizing your notes or reminders on Cisco IOU/IOL devices in Eve-ng


Here is an example of how to upload an IOL image using FileZilla:


  • Open FileZilla and enter the hostname, username, password, and port of your EVE-NG server.



  • Navigate to the /opt/unetlab/addons/iol/bin/ directory on the remote site.



  • Drag and drop the IOL image file from your local site to the remote site.



  • Wait for the transfer to complete.



Step 3: Fix the permissions




The third step is to fix the permissions of the IOL images by running the following command on the EVE-NG server:


/opt/unetlab/wrappers/unl_wrapper -a fixpermissions


This command will ensure that the IOL images have the correct ownership and executable rights.


Step 4: Create an iourc file




The fourth step is to create an iourc file to store the license key for the IOL images. You can generate a license key using a Python script or an online tool:








The iourc file should look something like this:


[license]


= ;


where is the name of your EVE-NG server and is the 16-digit hexadecimal license key.


Step 5: Verify the IOL images




The final step is to verify the IOL images on the EVE-NG web interface by creating a new lab and adding an IOL node. You should be able to start and configure the node without any errors.


Here is an example of how to verify an IOL image on EVE-NG:


  • Open your web browser and enter the IP address of your EVE-NG server.



  • Login with your username and password.



  • Create a new lab by clicking on Add new lab button.



  • Enter a name and description for your lab and click Save.



  • Add an IOL node by clicking on Add an object button and selecting Node.



  • Select Cisco IOL from the list of templates and click Next.



  • Select an image from the list of available images and click Next.



  • Enter a name and number for your node and click Save.



  • Start your node by right-clicking on it and selecting Start.



  • Open a console session by right-click ing on it and selecting Console.



  • Configure your node as per your requirements.



Benefits of Using IOL for EVE-NG




Some of the benefits of using IOL for EVE-NG are:


  • You can run multiple instances of IOS devices with low resource consumption.



  • You can simulate L2 and L3 features and functions of Cisco switches and routers.



  • You can prepare for Cisco certification exams or practice your networking skills.



Issues with IOL for EVE-NG




Some of the common issues with IOL for EVE-NG are:


  • You may encounter console freeze or packet loss issues with some versions of IOL images.



  • You may need to adjust the NVRAM and RAM settings of the IOL nodes to avoid configuration loss or memory errors.



  • You may need to update your iourc file if you change your hostname or domain name of the EVE-NG server.



Alternatives to IOL for EVE-NG




Some of the alternatives to IOL for EVE-NG are:


  • Dynamips: A software that emulates Cisco IOS routers.



QEMU: A generic and open source machine emulator that supports various network devices, including Cisco ASA, C


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