GNS3 is an excellent alternative or complementary tool to real labs for network engineers, administrators and people studying for certifications such as Cisco CCNA, CCNP andCCIE as well as Juniper JNCIA, JNCIS and JNCIE.
GNS3 is an open source (GNU GPL) software that simulates complex networks while being as close as possible from the way real networks perform, all of this without having dedicated network hardware such as routers and switches. If you face any problem setting it up with GNS3 drop me a message and I will get back to you asap. Please note that the IOSv appliance is based. All other platforms are now end-of-life and only support IOS 12.4.
Old ones are kept intact for your reference- Only the c7200 series get newer IOS 15 images.
Download here – įeel free to download them and use them for your Cisco certifications studies.
Update as on 14th May 2018 – Cisco IOS GNS3 – Srijit’s BlogĪll the IOS, IOU, Nexus and other images has been updated, checked and verified with latest GNS3 & GSN3 VM. Here I am listing all the working versions of Cisco IOS which I have tested with the latest version of GNS3.