Vqfx202r110reqemuqcow2 Work ✯ < Pro >

At the end, you’ll have:

If instead you meant develop a new software feature inside the vQFX (like a custom commit script, SLAX policy, or Python op script), let me know and I’ll provide a full SLAX/PyEZ example for that specific vqfx202r110 release.

Guide to Juniper vQFX: Implementing vqfx202r110reqemuqcow2

The vqfx202r110reqemuqcow2 refers to a specific virtual disk image for the Juniper vQFX10000

Routing Engine (RE) running Junos version 20.2R1.10 in a QEMU-compatible format. The vQFX is a virtualized version of the physical QFX10000 series switches, designed for network simulation and lab testing without requiring expensive hardware. Architecture of vQFX

To function correctly, the vQFX requires two separate virtual machines working in tandem:

Routing Engine (RE): The control plane where the Junos OS runs and configurations are managed. This is the component represented by the vqfx202r110reqemuqcow2 image.

Packet Forwarding Engine (PFE): The data plane that handles traffic forwarding. In virtualized environments, this is often a separate "Cosim" image. Deployment Prerequisites

Running this image typically requires a network emulator such as EVE-NG or GNS3. download for vQFX 20.2 is actually 19.4 | Data Center

Feature Name: Auto-provision + gRPC Telemetry Exporter
Target: vqfx202r110reqemuqcow2
Goal: When the vQFX boots, it:

Inside the mounted image, add a post-boot script that loads your feature.

Example:
Create /mnt/vqfx/etc/rc.local or override /mnt/vqfx/config/juniper.conf.

Better approach – use a custom OVA/libvirt XML with virt-customize: vqfx202r110reqemuqcow2 work

virt-customize -a vqfx202r110reqemuqcow2 \
  --run-command 'echo "set system commit script file auto-config.slax" >> /config/juniper.conf' \
  --copy-in my-auto-config.slax:/var/tmp/

Once booted, log in as root (no password by default on unconfigured vQFX). Set management IP via vg1 interface:

cli
configure
set interfaces vme unit 0 family inet address 192.168.1.10/24
set routing-options static route 0.0.0.0/0 next-hop 192.168.1.1
commit

Some engineers ask if vqfx202r110reqemuqcow2 can work on Docker or User-mode QEMU. No — the kernel modules require hardware virtualization. However, it can work on:

If you want, I can:

The keyword vqfx202r110reqemuqcow2 refers to a specific virtual disk image file for the Juniper Networks vQFX virtual switch. Specifically, it represents the Routing Engine (RE) component of the vQFX, running Junos OS version 20.2R1.10 in a QEMU-compatible QCOW2 format. Understanding vQFX Architecture

To make this image "work," it is essential to understand that a vQFX instance requires two distinct virtual machines (VMs) running in tandem:

Routing Engine (RE): The control plane that runs the Junos OS and manages configuration.

Packet Forwarding Engine (PFE): The data plane (often referred to as the "Cosim" or PFE image) that handles actual traffic forwarding.

A common point of confusion is that the vqfx-20.2R1.10-re-qemu.qcow2 file downloaded from Juniper's portal has been reported by users to sometimes identify itself internally as version 19.4R1.10. Setting Up vQFX in Lab Environments

To deploy this image successfully in popular network simulators like GNS3 or EVE-NG, follow these core requirements: 1. Image Requirements and Resources

RAM: Assign at least 1024 MB (GNS3) to 2048 MB (EVE-NG) for the RE. The PFE typically requires more, up to 4096 MB in some configurations. CPU: 1-2 vCPUs.

Virtualization: KVM acceleration must be enabled on the host. 2. Critical Connectivity

The RE and PFE must be interconnected for the switch to function. At the end, you’ll have:

RE Interface em1 must connect directly to PFE Interface em1.

User-defined switch ports are typically mapped to the RE VM (unlike the vMX, where they map to the PFE). RE Interface em0 is used for the management/admin VLAN. 3. Deployment Steps (General) Juniper vQFX RE - GNS3

Running the vQFX-20.2R1.10 virtual routing engine (vqfx-20.2R1.10-re-qemu.qcow2) requires a dual-VM setup because the vQFX is split into a Routing Engine (RE) and a Packet Forwarding Engine (PFE). To make it work, you must link these two separate QEMU virtual machines over a dedicated internal network. Core Components Required To get a functional switch, you need both images: RE Image: vqfx-20.2R1.10-re-qemu.qcow2 (the control plane).

PFE Image: Typically vqfx-20.2R1-2019010209-pfe-qemu.qcow (the data plane). Step-by-Step Configuration

The following specifications are standard for platforms like GNS3 or EVE-NG: 1. VM Resource Allocation vCPUs: Assign 2 vCPUs to each VM.

RAM: Allocate at least 1024 MB for the RE and 2048 MB to 4096 MB for the PFE.

NIC Type: Crucially, set the network interface type to virtio-net-pci; otherwise, the RE and PFE may fail to communicate. 2. Critical Interface Wiring You must connect the VMs precisely for them to "handshake":

RE Interface em0: Reserved for Management/Out-of-Band access.

RE Interface em1: Must connect directly to PFE Interface em1. This is the internal control link between the brain (RE) and the muscle (PFE).

RE Interface em2 and above: These are your actual switch ports (e.g., xe-0/0/0) where you connect other network devices in your lab. 3. Initial Access Default Username: root. Default Password: Juniper (case-sensitive). Known Issues & Troubleshooting

Version Mismatch: Although the filename says 20.2, some users report the image actually runs version 19.4R1.

Boot Time: The vQFX is notoriously slow to boot. It can take 7 to 10 minutes for the interfaces to fully populate and the RE to become "Master". If instead you meant develop a new software

Graceful Shutdown: Always use request system power-off both-routing-engines to avoid disk corruption or "non-master" role issues on the next boot. Guide: Importing Juniper vMX and vQFX into CML2.4

vqfx202r110reqemuqcow2 (often appearing as vqfx-20.2R1.10-re-qemu.qcow2 Routing Engine (RE)

image for Juniper's virtual QFX switch. This image acts as the control plane for the virtual switch and is designed to run within a QEMU-based virtualization environment like 1. Requirements for Setup

To make a vQFX "work," you typically need two separate virtual machines linked together: Routing Engine (RE): The file you mentioned ( vqfx...re...qcow2 ), which handles the Junos OS and configuration. Packet Forwarding Engine (PFE): A separate image (often named cosim...qcow2 ...pfe...qcow ) that handles the data plane. Minimum RAM Primary Function Control Plane / Junos CLI Data Plane / Packet Processing 2. Deployment Steps

The process generally involves importing both images into your lab environment and interconnecting them through a specific internal link. Juniper vQFX on GNS3 - Brezular's Blog 1 Jul 2022 —

Juniper vQFX on GNS3 * Creating vQFX RE VM. Navigate to Edit-> Preferences-> Qemu VMs and click the New. Choose the the name vQFX- brezular.com Juniper vQFX RE - GNS3

It sounds like you're working with VQFX (virtual Juniper vQFX), specifically a file named something like vqfx202r110reqemuqcow2 — likely a QEMU QCOW2 image for a vQFX switch (vQFX 20.2R1.10?).

Since you asked to "develop a feature" on this, I’ll assume you want to extend, automate, or enhance the behavior of a vQFX instance running from that QCOW2 image under KVM/QEMU.

Below is a structured plan to develop a custom feature — for example, adding automated config deployment + telemetry export to this vQFX switch.

For traffic forwarding tests (e.g., VXLAN routing), the RE alone won’t work. You need a separate vQFX PFE image (vqfx202r110pfe.qcow2). Connect them via a virtual back-to-back link using a socket or vhost-user interface.

Simplify by using Juniper vLab or containerlab with the following topology:

name: vqfx-evpn-lab
topology:
  nodes:
    spine:
      kind: juniper_vqfx
      image: vqfx202r110re-qemu.qcow2
      startup-config: spine.cfg
    leaf1:
      kind: juniper_vqfx
      image: vqfx202r110re-qemu.qcow2
  links:
    - endpoints: ["spine:ge-0/0/0", "leaf1:ge-0/0/0"]