Vqfx-20.2r1.10-re-qemu.qcow2 -

vqfx-20.2R1.10-re-qemu.qcow2 Routing Engine (RE) disk image for the Juniper vQFX virtual switch. To use it effectively in a network lab (like GNS3, EVE-NG, or CML), it must be paired with a corresponding Packet Forwarding Engine (PFE) Technical Overview & Setup Guide 1. System Requirements Minimum 1024 MB RAM for the RE. Virtualization: Requires KVM/QEMU acceleration. Default Credentials: (Note: Capital 'J'). 2. Architecture & Connectivity

The vQFX operates as a split-VM system where the RE handles the control plane and the PFE handles the data plane. RE Interface em0: Management/Admin VLAN. RE Interface em1: Dedicated link to the PFE's em1 interface. Traffic Ports: Vqfx-20.2r1.10-re-qemu.qcow2

User-defined switch ports are typically presented on the RE but processed by the PFE. 3. Common Implementation Steps Import using the Juniper vQFX RE appliance file ). Assign the image to the QEMU VM configuration. In EVE-NG: Create a directory (e.g., /opt/unetlab/addons/qemu/vqfx-20.2R1.10/ ), rename the file to , and run the fixpermissions In Cisco CML: Import the node definitions and upload the via the Image Definitions tab. Known Issues & Troubleshooting Guide: Importing Juniper vMX and vQFX into CML2.4 vqfx-20

This file is a QEMU disk image for vQFX, which is the virtualized version of Juniper Networks' QFX Series switch. It is specifically the Routing Engine (RE) image. rename the file to

5. Basic Setup Instructions (EVE-NG / QEMU)

3. Primary Use Cases

  1. JunOS Certification & Training (JNCIP/JNCIE) – Practice routing protocols (BGP, OSPF, ISIS) and switching features.
  2. Network Automation Testing – Test Ansible, Salt, or PyEZ scripts against a virtual Juniper switch.
  3. Multivendor Topology Simulation – Integrate with vMX, vSRX, Cisco IOSv, or Arista vEOS in EVE-NG/GNS3.
  4. EVPN/VXLAN Testing – vQFX is commonly used for data center fabric simulations (though note limitations in 20.2).

Use Case 1: Spine-Leaf Fabric

Deploy three vQFX instances (2 leaf, 1 spine). Use the switch-br bridge to interconnect their EBGP sessions.

Configuration snippet for Leaf1 (EBGP with Spine):

set protocols bgp group UNDERLAY type external
set protocols bgp group UNDERLAY peer-as 65001
set protocols bgp group UNDERLAY neighbor 10.0.0.1 (Spine IP)
set protocols evpn encapsulation vxlan
set protocols evpn default-gateway do-not-advertise

Developing a Feature

Assuming you want to add a feature like:

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