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Treyvon Wilson
Treyvon Wilson

Download iourc file for Cisco IOU/IOL images on EVE-NG

How to Download IOURC File for Cisco IOU/IOL Images

If you want to practice Cisco networking devices such as routers and switches, you can use simulators such as GNS3 or EVE-NG. These simulators allow you to run Cisco IOS images on virtual machines and create realistic network topologies. However, in order to run some of these images, you need a special license file called IOURC file. In this article, we will explain what is an IOURC file, why you need it, how to generate it, and how to use it for Cisco IOU/IOL images.

download iourc file

What is IOURC File and Why You Need It

An IOURC file is a text file that contains a license key for Cisco IOU or IOL images. These images are internal versions of Cisco IOS that run on Unix or Linux platforms. They are designed for testing and development purposes by Cisco employees or authorized customers only. Therefore, they are not publicly available and their distribution is prohibited.

IOURC File is a License File for Cisco IOU/IOL Images

An IOURC file is required to activate the Cisco IOU or IOL images. Without this file, the images will not run properly and will display an error message. The license key in the file is based on the host ID and hostname of the machine where the images are running. Therefore, each machine needs a different license key.

IOURC File is Required to Run Cisco IOU/IOL Images on GNS3 or EVE-NG

If you want to run Cisco IOU or IOL images on simulators such as GNS3 or EVE-NG, you need an IOURC file. These simulators use virtual machines to run the images, so you need to provide the license key for each virtual machine. The simulators will read the IOURC file from a specific location and pass it to the images.

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How to Generate IOURC File for Cisco IOU/IOL Images

In order to generate an IOURC file for Cisco IOU or IOL images, you need to follow these steps:

Step 1: Get the Host ID and Hostname of Your Machine

The host ID and hostname are unique identifiers of your machine that are used to generate the license key. You can get them by using the following commands:

  • For Windows machines, open a command prompt and type ipconfig /all. The host ID is the physical address of your network adapter and the hostname is the host name of your machine.

  • For Linux machines, open a terminal and type ifconfig -a. The host ID is the hardware address of your network interface and the hostname is the name of your machine.

  • For Mac machines, open a terminal and type ifconfig en0. The host ID is the ether address of your network interface and the hostname is the name of your machine.

Write down the host ID and hostname for later use.

Step 2: Run a Python Script to Generate the IOURC File Content

The next step is to run a Python script that will generate the license key based on the host ID and hostname. You can download the script from this link or copy and paste it from below:

#!/usr/bin/python import os import socket import hashlib import struct #hostid = os.popen("hostid").read().strip() #hostname = socket.gethostname() hostid = "001122334455" # replace with your host ID hostname = "myhost" # replace with your hostname def gen_key(hostid, hostname): m = hashlib.md5() m.update(hostname + hostid) seed = m.hexdigest() key = "" for i in range(4): part = seed[i*8:i*8+8] x = int(part, 16) if (x & 0x80000000): x = x - (1

Save the script as in a folder of your choice. Then, run the script by typing python in a command prompt or a terminal. You should see an output like this:

[license] myhost = 12345678123456781234567812345678;

This is the content of your IOURC file. Copy and paste it to a text editor for later use.

Step 3: Save the IOURC File Content in a Text File

The final step is to save the IOURC file content in a text file with the name iourc.txt. Make sure that the file has no extension other than .txt. You can use any text editor such as Notepad or Vim to create and save the file. The file should look like this:

[license] myhost = 12345678123456781234567812345678;

Congratulations! You have successfully generated an IOURC file for Cisco IOU/IOL images.

How to Use IOURC File for Cisco IOU/IOL Images

Now that you have an IOURC file, you can use it to run Cisco IOU/IOL images on simulators such as GNS3 or EVE-NG. Here are the steps for each simulator:

How to Use IOURC File for Cisco IOU/IOL Images on GNS3

GNS3 is a popular network simulator that allows you to create and run virtual networks with various devices such as routers, switches, firewalls, and servers. You can use GNS3 to run Cisco IOU/IOL images by following these steps:

Step 1: Download and Install GNS3 and GNS3 VM

The first step is to download and install GNS3 and GNS3 VM on your machine. You can download them from this link. GNS3 VM is a virtual machine that runs on VMware or VirtualBox and hosts the Cisco IOU/IOL images. You need to install both GNS3 and GNS3 VM on your machine.

Step 2: Download and Upload Cisco IOU/IOL Images to GNS3 VM

The next step is to download and upload Cisco IOU/IOL images to GNS3 VM. You can download them from various sources on the internet, but make sure that images are compatible with your simulator and that they have the right format and architecture. - If none of these steps work, you may need to contact the source of your Cisco IOU/IOL images or your simulator support for further assistance. Q: What are the advantages and disadvantages of using Cisco IOU/IOL images?

A: Cisco IOU/IOL images have some advantages and disadvantages compared to other types of Cisco IOS images. Some of the advantages are: - They are lightweight and consume less resources than real devices or emulators. - They support most of the Cisco IOS features and commands that are relevant for network simulation and testing. - They can run on various platforms such as Windows, Linux, Mac, etc. Some of the disadvantages are: - They are no


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