Yes, absolutely. With the right image (IOU L2, IOSvL2, or an Etherswitch router), you can configure STP, VLANs, trunking (802.1Q), VTP, and many other advanced features in GNS3.
Before searching for download links, it is crucial to understand Cisco’s licensing policies. Cisco IOS software is intellectual property owned by Cisco Systems.
For modern switch images (vIOS-L2), it is best to use the . Download the Cisco IOSvL2 appliance, then go to File > Import appliance .
If you are on a budget and don't mind older software, you can turn certain Cisco router images into "Etherswitch" routers. Cisco Community
Because Cisco protects its intellectual property, downloading IOS images from third-party blogs or torrent sites violates copyright laws and exposes your machine to security vulnerabilities. Use the following authorized methods.
Click New , select GNS3 VM as the server (highly recommended for performance), and browse to your downloaded image file. Configure Resources: RAM: Set the recommended RAM (usually 512MB for vIOS-L2).
If you or your organization has a valid Cisco service contract (SmartNet), you can download specific image files directly from the Cisco Software Central Legacy Hardware Extraction: You can extract an IOS
GNS3 does not come with Cisco IOS images pre-installed due to licensing restrictions. You must provide your own images. There are two primary types of images used for switches in GNS3:
can be used as an "Etherswitch Router," but they have very limited switching capabilities.
