


In this blog, the following three parts will discuss the installation process:Īs previously discussed, we must have an IOS file to install a Cisco device in GNS3. The blog also discusses how to configure a device through a template (from GNS3 Marketplace). This blog is for the users who want to simulate the router environment in GNS3VM irrespective of the vendors (Cisco, Juniper, etc.) The previous blog explained how to install and configure the GNS3 VM. It only facilitates a platform to use Cisco IOS but does not provide any Cisco IOS itself if someone wants to use any Cisco device in GNS3, they must install that device’s IOS first. GNS3 does not include any Cisco IOS in its default installation since Cisco IOS has copyright laws to protect it. Cisco uses proprietary software called Cisco IOS for its routers and switches. 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 (Graphical Network Simulator-3) is a network simulator software used to simulate routers, switches, and other networking devices, and it runs on Cisco IOS.


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.
