Before we explain how to install Cisco IOU on GNS3 VM, let’s mention that what is Cisco IOU? The expansion of the Cisco IOU is IOS on Unix / Linux. In short, they are Cisco IOS running on Unix and Linux operating systems.
Cisco IOU functions are similar to Dynamips, but Cisco IOU uses fewer resources. In Dynamips we can simulate Cisco Router, Switch, we can add the same devices in IOU structure.
The use of Cisco IOS on Unix is designed for experimental purposes by Cisco employees. Distribution and duplication of Cisco IOU images on customers or on any platform are strictly prohibited.
The biggest advantage of using Cisco IOU is that you can make much bigger network designs than Dynamips. With the IOU, you can achieve even higher performance gains by installing a virtual machine on an external disk. And also, you do not have to fill your computer’s storage with GNS3 images and projects.
Initially, the GNS3 was simulating Cisco IOS images with Dynamips. In the course of time, while working on larger network designs, Dynamips has sought a solution due to its high resource utilization. And now, with the GNS3 Server on the virtual machine, less resource utilization has been reached.
One of the greatest advantages the process to install Cisco IOU on GNS3 VM benefits from Cisco’s advanced Switching capabilities. You can create and try more VLANs.
GNS3 VM can easily add as an import in the VMware Workstation infrastructure, or we can easily configure Cisco IOU settings.
We can now move on to the steps to install Cisco IOU on GNS3 VM 1.5.4. After briefly discussing what is the Cisco IOU and what is the GNS3 VM, complete the following steps in order.
You can download the programs required to install Cisco IOU on GNS3 VM 1.5.4 from above buttons. Once you have unzipped the GNS3 VM, double click on it.
After the VMware Workstation program is opened, click the Import button to add the GNS3 OVA file to the virtual machine.
GNS3 VM VMware Workstation added to the virtual machine, you need to wait a while.
GNS3 OVA added to the virtual machine. Now, run the virtual machine.
GNS3 VM is the first boot image.
GNS3 VM is opening…
In the GNS3 IOU VM integration process looks like the image below after starting. Here we will configure using the GNS3 VM Ip address.
Press the Enter key on the OK option.
On the GNS3 VM configuration screen, press the Enter key on the Shell (Open a console) option.
In the GNS3 IOU VM installation, you will need the license file to install the IOS from your GNS3 Server. Here, some points blurred during licensing. As mentioned above, the distribution of Cisco IOU images strictly prohibited.
Given that you have Cisco IOU images, use the commands in the following image to look at the license file in the GNS3 root folder to use Cisco IOU images.
To access the GNS3 VM root folder, we will use the WinSCP program. After you open the WinSCP program, type in the GNS3 VM Ip address. Next, type gns3 in the user name and password, and then press the Login button.
Click on the Yes button in the WinSCP program security warning.
As you can see in the following image, we are in the / home / gns3 / root folder. Copy the license file here.
Click on the OK button to complete the operation.
Our license file copied to the GNS3 VM root directory.
Go back to the GNS3 VM virtual machine and run the command file at the command prompt with the command python3 CiscoIOUKeygen.py. Next, you need to add the generated license number to the iourc.txt file.
On the desktop, create a text document named iourc.txt, and then enter and save the values as shown in the following image.