Gns Cisco

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The first thing to do after installing the GNS3 network simulator program is to add a Cisco Router or Switch IOS image. If you don’t have IOS images, you can download the related files from here. How to Add Cisco Router on GNS3? You can install this simulator software on. In the recent years, virtualization technology has advanced to the point that nearly everything can be virtualized. Started from server and storage virtualizations, to Software Defined Networking (SDN), the entire datacenter technology is trending to the direction of moving away from physical infrastructure. If the production network is going virtual, for fellow network engineers. Originally only emulating Cisco devices using software called Dynamips, GNS3 has now evolved and supports many devices from multiple network vendors including Cisco virtual switches, Cisco ASAs, Brocade vRouters, Cumulus Linux switches, Docker instances, HPE VSRs, multiple Linux appliances and many others. How can I emulate switch in GNS3 for learning purposes to practice building real lab for CCNA/CCNP certifications. I love GNS3- it is a great tool which can run real Router IOS, but still limitation for learning switching functionalities. GNS3 is one of the Network Simulators, that allows you to use real router images.

July 14, 2014srijit

Here I am listing all the working versions of Cisco IOS which I have tested with the latest version of GNS3.

Update as on 14th May 2018 –

All the IOS, IOU, Nexus and other images has been updated, checked and verified with latest GNS3 & GSN3 VM. Download here –

Feel free to download them and use them for your Cisco certifications studies.

Old ones are kept intact for your reference-

Cisco gns3 download
  1. 1700 –
  2. 2600 –
  3. 2691 –
  4. 3640 –
  5. 3660 –
  6. 3725 –
  7. 3745 –
  8. 7200 (v15) –
  9. 7200p (v15) –

Mirror Links:


Gns3 Free Download



If you face any problem setting it up with GNS3 drop me a message and I will get back to you asap.

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.

Cisco Gns3 Download

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.

In order to provide complete and accurate simulations, GNS3 actually uses the following emulators to run the very same operating systems as in real networks:

Gns Cisco Router

  • Dynamips, the well known Cisco IOS emulator.
  • VirtualBox, runs desktop and server operating systems as well as Juniper JunOS.
  • QEMU, a generic open source machine emulator, it runs Cisco ASA, PIX and IPS.

Gns Cisco Ios

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.