![]() ![]() In this post, we show how to install and set up GNS3 and VirtualBox to emulate a network consisting only of open-source routers and hosts. While there are many web sites and online tutorials dedicated to using GNS3 to emulate Cisco networks and Juniper networks, I found only a small amount of information about using GNS3 to emulate a network of Linux virtual machines running open-source routing and switching software. Our interest is to emulate networks of open-source routers and switches using open-source technologies. GNS3 also supports other hardware emulation and virtualization technologies that can run Linux virtual machines: Qemu and VirtualBox. GNS3 supports Cisco router software images running on the Dynamips hardware emulation program. ![]() GNS3 is primarily used to emulate networks of Cisco routers and is used by professionals studying for Cisco certification exams. GNS3 is a very popular network simulation tool that runs on the major operating systems: Windows, Mac OS, and Linux. ![]()
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