GNS3 Supported Cisco Router IOS Images Download. GNS3 is more specific and professional than Cisco Packet Tracer. There is no need to. I have some cisco routers that i purchased 6 yrs ago with outdated IOS. a valid service contract, otherwise you have no legal rights to download the images. So without talking much here are the link where you can free download Cisco ios image and you can upload or use this ios to the router and as well as in GNS3.
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