Whether you are preparing for Juniper certification, developing network automation code, validating EVPN-VXLAN designs, or integrating network testing into CI/CD pipelines, the vQFX provides an accessible, free platform for network innovation. While it has limitations - software-only forwarding, longer boot times, and no official support - its value as a cannot be overstated.
Use community-provided node definitions to import the images into CML 2.x.
1. Anatomy of the Filename: What is vqfx-20.2R1.10-re-qemu.qcow2 ? vqfx202r110reqemuqcow2
Routing Engine (RE). Controls the software and control plane.
: This specifies that the image is the Routing Engine (Control Plane). Controls the software and control plane
: The hypervisor it’s built for. QEMU is the gold standard for open-source virtualization in Linux environments.
Some engineers use shorthand like vqfx202r1 meaning vQFX 20.2 release R1. However, 110 is unusual — maybe 1.10 or 11.0 ? The safest reading is a custom internal build tag. developing network automation code
: The file extension and disk image format. QCOW2 (QEMU Copy On Write) is the standard storage format for QEMU/KVM. It is highly efficient because it grows dynamically, taking up physical disk space only as data is written to the virtual drive. The Dual-VM Architecture of vQFX
There is a documented issue where some versions of the vQFX image labeled as actually report as version once booted and verified with the show version
The Junos OS on the vQFX is a full network operating system. It does not boot instantly like a lightweight container.
