Junos vQFX10000 is a virtualized version of the physical QFX10000 switch, designed for network simulation, lab testing, and automation development. The specific image file represents the Routing Engine (RE) portion of this virtual switch for version 20.2R1.10, formatted for QEMU-based hypervisors. Understanding the vQFX Architecture
Troubleshooting tips
: Frequently used in GNS3 tutorials to learn Junos OS without needing expensive hardware. Juniper Elevate Community Guide: Importing Juniper vMX and vQFX into CML2.4
Unlike standard network emulators that wrap everything into one image, the vQFX splits the system into two distinct virtual machines. This architecture mirrors physical hardware mechanics: Vqfx-20.2r1.10-re-qemu.qcow2
Use request system power-off both-routing-engines inside JunOS to avoid boot issues in future sessions. Common Issues
I see you are configuring high-performance network emulations. Would you like a step-by-step to automate the initial configuration of this vQFX node once it boots up? Share public link
Note: For a functional switch, you must also link this instance to a corresponding PFE instance. Benefits of the 20.2R1.10 Release Junos vQFX10000 is a virtualized version of the
Handles the data plane, performing the actual packet switching and forwarding logic.
vqfx-20.2R1.10-re-qemu.qcow2 file is the Routing Engine (RE) disk image for the Juniper vQFX10000
Unlike a standard monolithic virtual machine, the Juniper vQFX utilizes a split-architecture model to accurately simulate a physical QFX series switch. It divides operations into two distinct virtual machines: Juniper Elevate Community Guide: Importing Juniper vMX and
Upon initial boot, the RE and PFE will start up. It may take several minutes for the system to settle. Use the console to verify the status of the routing engine. Important Considerations and Troubleshooting
This is the . QEMU Copy-On-Write version 2 is an advanced format that supports:
Multi-homing active-active topologies without relying on legacy proprietary technologies like MC-LAG. Infrastructure as Code (IaC) Validation
qemu-system-x86_64 -m 2048 -hda Vqfx-20.2r1.10-re-qemu.qcow2 -net nic -net user
Whether you are using GNS3 or EVE-NG to prepare for a or JNCIE-DC lab, deploying this RE image requires specific configuration parameters to ensure it boots properly and links to the PFE.