The most common images for GNS3 are:
Downloading a specifically for GNS3 is not a direct process because GNS3 does not provide Cisco software due to legal restrictions . Furthermore, the Catalyst 4500 series uses hardware-based switching (ASICs) that standard emulators like Dynamips cannot simulate. Legal & Official Methods to Obtain Images
Searching for a is often a wild goose chase. The 4500 is a hardware-dependent chassis. While you can emulate its Supervisor with enough tweaking, the performance and feature-set will never match a real switch.
: You can add a NM-16ESW module to a supported router (like the Cisco 3725) within GNS3 to provide basic Layer 2 functionality.
Since the Catalyst 4500 specifically isn't a standard virtual appliance, most users utilize these alternatives:
Before diving into download links (which we will not provide illegally), you must understand a critical technical limitation: While GNS3 can run many IOS images, it struggles with backplane switching (ASIC-based forwarding). The Catalyst 4500 relies heavily on hardware forwarding.