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. QEMU, a generic open source machine emulator, it runs Cisco ASA, PIX and IPS.VirtualBox, runs desktop and server operating systems as well as Juniper JunOS.
GNS3 provides an intuitive graphical user interface to design and configure virtual networks, it runs on traditional PC hardware and may be used on multiple operating systems, including Windows, Linux, and Mac OS X. 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. In next step choose amount of RAM for your virtual machine and choose qemu binary (in my case qemu-system-x8664w.exe). After clicking on next, type name of your virtual machine. If you face any problem setting it up with GNS3 drop me a message and I will get back to you asap. Open GNS3, go to preferences in Edit tab (or you can use Ctrl+Shift+P). Old ones are kept intact for your reference- Gns3 Asa 9. With this software, you can emulate a Cisco Router/Switch and prepare for Cisco exams in a more professional way. You need to use GNS3 to use the actual Router and Switch IOS images. Download here – įeel free to download them and use them for your Cisco certifications studies. There is no need to add any Cisco devices to the Packet Tracer, but it is absolutely necessary to download and add the Cisco IOS for GNS3. 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.
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