In this videos I show you how to add Cisco IOU Layer3 image to GNS3 version 2.2.22 Web UI. for link to download Cisco IOU L3 click here.
https://drive.google.com/file/d/1sl3Z...

If you cannot find .iourc please follow these steps.
1) Login Using SSH in GNS 3 VM
2) Update repositories - apt-get update after entering root mode using sudo su
3) Download Phthon - apt-get install python
4) Download the keygen - wget http://www.ipvanquish.com/download/Ci...
4) Give permission - chmod 0755 CiscoIOUKeygen3f.py
5) Execute it - python3 CiscoIOUKeygen3f.py