How to add Router IOS images in GNS3 step by step | English
Obtain the IOS image: You need to have a valid Cisco IOS image for the router you want to simulate. Make sure you have the necessary legal rights to use the image.
Launch GNS3: Open the GNS3 application on your computer.
Go to Preferences: Click on "Edit" in the top menu and select "Preferences" from the drop-down menu.
Navigate to Dynamips: In the Preferences window, click on "Dynamips" on the left-hand side.
Select IOS routers: Under the "IOS routers" section, click on the "New" button.
Add IOS image details: In the "New IOS router template" window, enter a name for the router in the "Name" field.
Select platform and architecture: Choose the appropriate platform and architecture for the IOS image you have. For example, if you have a Cisco 7200 series image, select "c7200" as the platform and the appropriate architecture.
Specify the path to the IOS image: Click on the browse button (...) next to the "Path to the IOS image" field and navigate to the location where you have stored the IOS image file. Select the file and click "Open".
Set the memory: Adjust the "RAM (MiB)" field to allocate the desired amount of RAM for the router. This will determine the available memory for the simulated router.
Click on "Save" to save the settings.
Verify the router: Once the router template is created, you should see it listed under "IOS routers" in the Preferences window.
Close the Preferences window: Click on "OK" to close the Preferences window.
Add the router to your project: In the GNS3 main window, drag and drop the router from the device list on the left-hand side into your project workspace.
Configure the router: Right-click on the router icon in the project workspace and select "Configure" to set up the router's interfaces, IP addresses, and other configuration parameters.
Start the router: Right-click on the router icon and select "Start" to launch the router simulation.
By following these steps, you should be able to add a router IOS image in GNS3 and simulate the desired router in your network topology. Remember to comply with any licensing and usage agreements associated with the IOS image you are using.
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