Handles the data plane, simulating the hardware ASICs.
The vqfx-20.2R1.10-re-qemu.qcow2 image is the core component of Juniper Networks' , which is the virtualized, software-based version of the QFX10000 modular Ethernet switches. Physical QFX10000 switches deliver up to 96 Tbps of system throughput and unparalleled 100GbE port density. Designed for large-scale data centers, they provide high-density 100G/40G/10G interfaces and serve as a fundamental building block for spine-and-leaf (Clos) fabric architectures. The vQFX aims to replicate this experience in a virtual environment.
To route loopback addresses across the fabric. IBGP/EBGP Overlays: For EVPN signaling. vqfx202r110reqemuqcow2 exclusive
To protect the integrity of your primary asset, never boot the base image directly. Instead, create a dedicated copy-on-write snapshot target for your exclusive instance. This speeds up deployment times and saves massive amounts of disk space.
Prevents CPU stealing from other virtual machines. Handles the data plane, simulating the hardware ASICs
Access your EVE-NG CLI via SSH and create a directory under the qemu path. The folder name must start with the prefix vqfxre- . mkdir -p /opt/unetlab/addons/qemu/vqfxre-20.2R1.10/ Use code with caution.
Juniper Networks provides the vQFX software through its official customer support and evaluation portals. While the vQFX is a free tool for testing and development, it is not sold and is officially unsupported by Juniper for production environments. It is intended for proof-of-concept, script development, configuration validation, and training. The vQFX in its light mode (RE-only) requires minimal resources—1 GB RAM and 1 vCPU in Juniper Cloud CCL labs, though in GNS3 1024 MB RAM is commonly allocated. IBGP/EBGP Overlays: For EVPN signaling
. This image allows network engineers to simulate complex data center fabrics and test Junos OS features without the need for physical hardware. Understanding the vQFX Architecture
This technical guide provides a deep dive into using the image in exclusive QEMU/KVM environments for building high-fidelity Juniper network simulations. Understanding the Keyword Components
The (QEMU Copy‑On‑Write version 2) format is QEMU’s most advanced disk image format. Its key features are: