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If it's not emulated by dynamips, not already a ready to run "virtual" hardware (either as VM or container) and not an IOU image you can't use the specific image. So to answer you question: Yes, you need specific images.
Router ios for gns3 software#
You can also use networking software provide as a docker container by a vendor. For these VMs you can use different VM providers like qemu, VMWARE or VirtualBox.
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A third option is to use Cisco IOU (IOS for UNIX) which is also a Linux with IOS Code inside but it's espacacily build for lab and learning environments, not to actually route or switch traffic. It started as an GUI for dynamips which can emulate certain older Cisco hardware and the images for this hardware.įor some time now you can use "virtual" networking hardware, like Cisco ASR1000v which is basically a Linux VM running the IOS Code inside. The prompt and the output of several linux commands. With this GNS3, you can clone as many times as you want the templates of virtual linux machines named 'Debian' and 'DDebian' that contain many network tools and services. And theyre available inexpensively or even free. There are a lot of switches, routers, and firewalls out there that, although not the latest, are still quite functional. But, if youre trying to work with a lab setup, consider getting the actual physical gear. GNS3 is a front end for different kinds of "virtual" network hardware. GNS3 is the gui used to manipulate the simulators/emulators of networks and systems like QEmu, Docker, Dynamips. If your goal is to run GNS3, then you need to get the IOS images in an appropriate way.