Download Cisco IOS Images For GNS3

Download Cisco IOS Images For GNS3






Download Cisco IOS Images For GNS3

Below are all the working versions of Cisco IOS which we have tested with the latest version of GNS3. You can Download Cisco IOS Images For GNS3 from below links directly. Feel free to download them and use them for your Cisco certifications studies.If you face any problem setting it up with GNS3 drop us a message and we will get back to you asap.


Download c1700-k9o3sy7-mz.124-12

Download c2600-adventerprisek9-mz.124-25b.bin

Download c3640-js-mz.124-25d.bin

Download c3725-adventerprisek9-mz.124-15.T5.bin

Download c7200-adventerprisek9-mz.151-4.M.bin

Download PIX 8.0.2

Download ASA asa802-k8.initrd

Download ASA asa802-k8.kernel


Download All above files in one go  Click Here    (File size 182 MB)

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.

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:

  • 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.

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.

Minimum memory

The minimum RAM is the amount of memory needed for IOS to work at maximum capacity with most feature configured and activated. From experience you can usually use a bit less RAM just fine.You can also use gns3 on low end computer by using idle pc value

Recommended images

We really recommend using c3640, c3660, c3725, c3745 and c7200 IOS images listen above, they have proven to be the most stable in GNS3 provided you use the right amount of RAM and Idle-PC value.

Idle-PC value

This settings will help Dynamips to consume less CPU. It’s specific to each different IOS image.Idle pc value will be the best option to make Gns3 work smoothly on any computer. To learn how to setup Idle pc value check this post How To setup idle pc value easily



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