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The minimum I have seen for this is 256MB. For the binary image, select the image you acquired in step 1.Below is a screenshot of what the Qemu settings should look like:Ĭlick on Test Settings to check if your settings are correctĬlick on the JunOS tab on the same Preferences window Make sure the settings in the General Settings section are correct. Open GNS3 and go to Edit -> Preferences -> Qemu The image file should be with the extension. These are the steps required to setup JunOS on GNS3 using Qemu:Īcquire an image of JUNOS. This can be a Juniper router, a Huawei router or a Nokia router.This can be configured using VirtualBox or using Qemu. Beside Cisco, you can also load other vendor images to practice on their router. Like these steps, you can load any other images to GNS3 Simulator.

Here, we have learned How to Install Cisco GNS3 IOS images. And then we will click next to finish our installation.Īfter installing Cisco IOS Image, you will be able to see the router details under router option. In the dropdown list, we will select, “ GT96100-FE” here and then click next. In this step, we will select the network adaptor that we will use. You can set a new value or you can click next to use the default one. There will be a default RAM in this step. We can give any name to the router here and then click next. Then, we will change the name of the router.

We will select the path where the IOS image is stored on our local PC. In this step, we will select the path of the IOS image to laod it to GNS3. In this window, we will click ”new” to create new router. To do this, we will go Edit/Preferences/IOS routers. In the second step, we will add IOS router to GNS3.

Here, we will use c2691 router image for our example.

You can find oen of them and download this image. There are some images that is used for educational purposes on Internet. To use a specific Cisco IOS image, firstly you should find and download it from Internet.