This article explains how to use CSR (Cloud Service Router) 1000v with GNS3.

IOU (IOS On Unix) can be run on GNS3 VM and used in GNS3 projects.
Note that it is assumed that you have the IOU image file.

GNS3 is frequently upgraded, and we will explain in detail how to upgrade your GNS3 version, including screenshots.

GNS3 appliances are pre-defined device templates. Typically, to emulate a Cisco IOS router or other device on GNS3, you must first create a template. By importing an appliance file (.gns3a), you can easily create a template for the device you wish to emulate.

You can add FRR (Free Range Routing) container to GNS3 and use it as a software router.
This page explains how to add the FRR container and an example of interconnection with Cisco IOS routers.

This page explains how to add a Docker container’s lightweight Linux host on GNS3.

This section explains the points to check when the GNS3 VM does not turn green in Servers Summary.

The IOS of the actual device is necessary to emulate the Cisco router with GNS3.
This section explains how to download the IOS image file for an actual router.

This page explains how to install GNS3 on Windows 10.

Create a GNS3 project and perform various verifications with GNS3.
This page explains how to create a GNS3 project in detail.