You can request 60-day or 90-day trial images for vMX (Virtual MX Series Router) and vSRX (Virtual Firewall) directly from Juniper Support .

Where to find Junos images for GNS3 | Training and Certification

To get Juniper routers running in GNS3, you need specific virtual images designed for virtualization, such as , vSRX , or the newer vJunos-router . Where to Download Juniper Images for GNS3

Official and legal images are the only reliable way to ensure your lab remains stable and compatible with the GNS3 VM .

If your computer lacks the RAM to run these images locally, Juniper provides vLabs , a free online sandbox with pre-built topologies. Top Juniper Images for GNS3

Juniper offers vJunos-router , vJunos-switch , and vJunosEvolved images at no cost for non-production lab environments. These are specifically designed for testing and learning. You can find them on the Juniper vJunos-labs download page.

If you are building a virtual network lab, finding a "Juniper router IOS image" is actually your first lesson in Juniper networking: Juniper devices do not run (which is Cisco's proprietary software); they run Junos OS .