Switching in GNS3 Using IOU
Tools Required:
1- GNS3: https://www.gns3.com/
2- Oracle VirtualBox: https://www.virtualbox.org/
3- GNS3 IOU VM.ova: https://sourceforge.net/projects/gns-...
4- IOU image: Google is your friend always :)
5- iourc.txt file: Is the license of Cisco IOU image. I have no privilege to provide it publicly, but you can google it :)