IOS image support different packages like routing, switching and inter-networking etc. Because these are modified forĬ andĬ5sumĬ andĬ.md5sumĬ andĬ.md5sumĬ andĬ.md5sumĬ andĬ5sumĬ andĬ.md5sumĬ5.image andĬ5.image. Working 3745 IOS download for Gns3 IOS image is software or Operating System used in most Cisco routers and switches. So these will not work on hardware machine. NOTE: These all below IOS are specifically designed and modified for GNS3 and EVE-NG.
If you want to download Cisco switch IOS or IOU / IOL images: