GNS3 Supported IOS Images Download – There are the most stable and most suitable running Cisco IOS images for use in GNS3. These Cisco Router IOS images are the most used images when designing network with GNS3.
GNS3 Supported IOS Images Download

GNS3 Supported IOS Images Download

With GNS3, you can build complex topologies using these Cisco IOS images. Cisco Router IOS images can also be obtained from the manufacturer’s website or from any source. However, as you prepare for the Cisco exams with GNS3, we share the most appropriate Cisco IOS images for you to use.

You need to know the Minimum Ram requirements to run Cisco Router or Switch IOS images. If you set a value for a Cisco Router IOS image that is larger than the Minimum RAM requirement, you may experience performance problems because your computer uses more processor. As a result, you can also set a higher Ram value for Cisco Routers on GNS3.

The IDLE-PC value on GNS3 is set so that a Router or Switch does not force your system. You can set the IDLE-PC value while adding a new network device in GNS3. The IDLE-PC value will be determined according to the hardware specifications of your computer.

The most suitable Cisco IOS images that can be used on the GNS3 are the c3640, c3660, c3725, c3745 and c7200 IOS images. It is a good idea to note the minimum RAM requirements of these GNS3 supported IOS images. There are several additional Cisco IOS images below. For example, if the c1700 series router is used, it will be inadequate if you design a more complex network.

Download Cisco IOS Images for GNS3

You can download the GNS3 supported Cisco IOS images to your computer by clicking the related buttons below.

   Download Cisco IOS c1700 for GNS3

1 – IOS Version: 12.4.25d
File Name: c1700-adventerprisek9-mz.124-25d.bin
Minimum RAM: 128MB

Download Cisco c1700-adventerprisek9-mz.124-25d IOS Image

2 – IOS Version: 12.4.15T14
File Name: c1700-adventerprisek9-mz.124-15.T14.bin
Minimum RAM: 160MB

Download Cisco c1700-adventerprisek9-mz.124-15.T14 IOS Image

   Download Cisco IOS c2600 for GNS3

1 – IOS Version: 12.4.25d
File Name: c2600-adventerprisek9-mz.124-25d.bin
Minimum RAM: 128MB

Download Cisco c2600-adventerprisek9-mz.124-25d IOS Image

2 – IOS Version: 12.4.15T14
File Name: c2600-adventerprisek9-mz.124-15.T14.bin
Minimum RAM: 256MB

Download Cisco c2600-adventerprisek9-mz.124-15.T14 IOS Image

   Download Cisco IOS c2691 for GNS3

1 – IOS Version: 12.4.25d
File Name: c2691-adventerprisek9-mz.124-25d.bin
Minimum RAM: 192MB

Download Cisco c2691-adventerprisek9-mz.124-25d IOS Image

2 – IOS Version: 12.4.15T14
File Name: c2691-adventerprisek9-mz.124-15.T14.bin
Minimum RAM: 256MB

Download Cisco c2691-adventerprisek9-mz.124-15.T14 IOS Image

   Download Cisco IOS c3640 for GNS3

IOS Version: 12.4.23
File Name: c3640-a3js-mz.124-23
Minimum RAM: 128MB

Download Cisco c3640-a3js-mz.124-23 IOS Image

   Download Cisco IOS c3660 for GNS3

IOS Version: 12.4.19
File Name: c3660-a3jk9s-mz.124-19.bin
Minimum RAM: 192MB

Download Cisco c3660-a3jk9s-mz.124-19 IOS Image

   Download Cisco IOS c3725 for GNS3

1 – IOS Version: 12.4.25d
File Name: c3725-adventerprisek9-mz.124-25d.bin
Minimum RAM: 128MB

Download Cisco c3725-adventerprisek9-mz.124-25d IOS Image

2 – IOS Version: 12.4.15T14
File Name: c3725-adventerprisek9-mz.124-15.T14.bin
Minimum RAM: 256MB

Download Cisco c3725-adventerprisek9-mz.124-15.T14 IOS Image

   Download Cisco IOS c3745 for GNS3

1 – IOS Version: 12.4.25d
File Name: c3745-adventerprisek9-mz.124-25d.bin
Minimum RAM: 256MB

Download Cisco c3745-adventerprisek9-mz.124-25d IOS Image

2 – IOS Version: 12.4.15T14
File Name: c3745-adventerprisek9-mz.124-15.T14.bin
Minimum RAM: 256MB

Download Cisco c3745-adventerprisek9-mz.124-15.T14 IOS Image

   Download Cisco IOS c7200 for GNS3

1 – IOS Version: 15
File Name: c7200-adventerprisek9-mz.152-4.M7.bin
Minimum RAM: 512MB

Download Cisco c7200-adventerprisek9-mz.152-4.M7 IOS Image

2 – IOS Version: 12.4.25g
File Name: c7200-a3jk9s-mz.124-25g.bin
Minimum RAM: 256MB

Download Cisco c7200-a3jk9s-mz.124-25g IOS Image

3 – IOS Version: 12.4.24T5
File Name: c7200-adventerprisek9-mz.124-24.T5
Minimum RAM: 256MB

Download Cisco c7200-adventerprisek9-mz.124-24.T5 IOS Image

How to Add Cisco IOS Images to GNS3? ⇒ Video

To add the Cisco Router IOS images you downloaded to GNS3, you can watch the video below and also subscribe to our YouTube channel to support us…

  Final Word

How to Download GNS3 Supported IOS Images? – In this article, we have shared the Cisco Router IOS images for GNS3. We recommend that you use these Cisco IOS images because some Cisco Router IOS images may not run on GNS3. Thanks for following us!

If this article is helpful, send me feedback by commenting! Thanks in advance, take care of yourself!

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26 thoughts on “GNS3 Supported IOS Images Download

  1. Jason Thompson

    Great Article with easy to follow instructions and resources thank you Tolga. Do you have any articles that speak to GNS3 nested virtual setup in VM workstation pro with ESXI running inside as a VM?

    1. tolqabaqci

      Thank you for feedback!
      There are many articles on the site about GNS3. I started writing for the beginner level. Over time I am going to post professional articles.

  2. Omkar

    Can any one share ISO file for firewall. I am looking for checkpoint, palo alto, and ASA or ay CISCO firewall. And thanks for sharig above ISO images. this are very usefull

  3. Jakes

    When trying to import the IOS files, it keeps giving me similar errors as seen below.

    This is not the correct file. The MD5 sum is 56db8c8d38c5727ec6780c5ba7e5f2f1 and should be 483e3a579a5144ec23f2f160d4b0c0e2.

    Please advise if this might be me doing something wrong? I have confirmed that the file names match exactly what is required.

  4. nate

    Hi, thank you for posting these and making them available. I’m a little concerned about using them though, do I need to have a Cisco Service Contract in order to use these images legitimately?

    1. tolqabaqci

      Hello Nate! Thanks for your comment!

      You must have a hardware license to download Cisco IOS images. Cisco does not allow IOS images for emulators like Dynamips. However, Cisco wink at the use of IOS images on the GNS3 and this is a very good thing.

      You can download Cisco IOS images in many sources on the Internet. As a result, when you reach CCNP level, you will have to compulsorily use GNS3 because most commands are not supported in Packet Tracer.

  5. PJ


    How do I fix when incorrect MD5 match?
    I’m trying to use bin file c3725-adventerprisek9-mz.124-15.T14.bin on GNS3.

    Thank You

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