What is GNS3?

GNS3 (Graphical Network Simulator 3) is an open-source software that imitates the way real networks perform by simulating complex networks, all without the help of routers or switches. It is recommended for use by network engineers and administrators. It is also for people who are studying for certifications such as Cisco CCNA, the CCNP, the Juniper JNICA, and the JNCIE. The program connects the virtual network of the user to the real world. It runs on PC hardware and can be used on different operating systems including Windows, Linux, and MacOS X.

GNS3 also supports open source networking. It is used to experiment on features or check configurations that need to be arranged on real devices. To use GNS3, the user needs to have his own copy of a network operating system.

Download GNS3 from the developer does not provide software hosting. We send you directly to the developer's site, to make sure you download the latest, original version of the program.

Download GNS3 (external link)

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File types supported by GNS3

Our users primarily use GNS3 to open these file types:

About file types supported by GNS3 aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about which types of files GNS3 can process, please do get in touch - we would love hearing from you.