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
A defining characteristic of the vQFX "work" or operation is its dual-component architecture. Unlike a simple virtual machine, the vQFX typically requires two distinct virtual disks to function accurately:
If you continue to face issues, check the Juniper Networks support forum or your local KVM mailing list. And remember: always match the RE version with a compatible PFE if you need data plane functionality.
Juniper's vQFX10000 allows network engineers to simulate high-performance QFX data center switches. The platform splits its architecture into two distinct virtual machines (VMs) to mirror physical hardware: vqfx202r110reqemuqcow2 work
#!/bin/bash cp vqfx202r110reqemuqcow2 vqfx202r110reqemuqcow2-custom virt-customize -a vqfx202r110reqemuqcow2-custom \ --upload telemetry.py:/var/tmp/ \ --run-command 'chmod +x /var/tmp/telemetry.py' \ --run-command 'echo "@reboot root /var/tmp/telemetry.py" >> /etc/crontab'
Running multiple vQFX instances requires significant host memory and CPU, as each "switch" is actually two separate VMs.
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". To make a vQFX "work," you typically need
The Juniper vQFX10000 (specifically the vqfx202r110-re-qemu.qcow2 image) is a staple for network engineers building virtual labs. This image serves as the , responsible for the control plane. Executive Summary
However, getting the Routing Engine image file—specifically —to work correctly under QEMU and KVM environments is notoriously tricky. Because the vQFX uses a split-architecture design, setting up this file requires a precise understanding of its dependencies, virtual interfaces, and emulation properties.
<cpu mode='host-model'/>
Getting Started with vQFX202R110-reqemuqcow2: A Guide to Running Virtual Juniper QFX Switches
Minimum 2048 MB (2 GB) for stable boot cycles.
Every time a new image file is manually introduced to EVE-NG, permissions must be realigned so the QEMU process can access the storage: /opt/unetlab/wrappers/unl_wrapper -a fixpermissions Use code with caution. Linking the RE and PFE in the Topology Deployment Steps A defining characteristic of the vQFX
The format is QEMU’s recommended image format, offering advanced features such as sparse file support (saves storage space), optional AES encryption, zlib-based compression, and the ability to support multiple virtual machine snapshots within a single image file.