The Cisco IOU L2, which enables you to replicate the Cisco switch on gns3, is one of the devices you would love to have if you use gns3 and want to do intricate labs. While importing the image into gns3 and downloading cisco iou images are both very simple processes, bringing up the image is more difficult because you must first generate the license key for it in order for it to function.
There are some simple steps for creating and installing the Cisco IOU L2 keygen license for usage with gns3. The fortinet lab shave been downloaded and successfully imported into the Cisco IOU L2 appliance, and that your gns3 is installed and linked to the gns3 VMware. There will be an error that reads, “Could not find an iourc file (IOU license), please configure an IOU license,” if you try to launch the appliance without the license key. Follow the instructions below to fix this issue.
Create a keygen for the Cisco IOU L2
Step 1: Using putty or another terminal emulator, ssh to your gns3vm's IP address. Gns3 is the username and password. Using the down arrow key, select the shell option, then press the enter key after pressing the enter key a few times.
Step 2: Enter the following command, “wget http://www.ipvanquish.com/download/CiscoIOUKeygen3f.py,” into the terminal. Take care not to duplicate the quotation marks.
Step 3: Check that a directory named CiscoIOUKeygen3f.py has been created using the list command. To confirm, type “ls”.
Step 4: To view the licence key, type the command “cat iourc.txt.”
Go to gns3, select the edit tab, click on preferences, select IOS on Unix, and paste the provided key. Your IOU L2 devices for GNSS3 use can now be turned on and you can start using it now.
