Never run the base image directly. Use a backing file to create instances.
# Create a directory for your lab
mkdir ~/vqfx-lab
cd ~/vqfx-lab
Connect to your EVE-NG server via SSH and create a directory for the vQFX. Vqfx-20.2r1.10-re-qemu.qcow2
mkdir /opt/unetlab/addons/qemu/vqfx-20.2r1.10
If you are using GNS3, the setup involves creating a "Symbol" for the vQFX and linking the VMs. Never run the base image directly
Network: Set the first network adapter to the "GNS3 VM" or your local server.
PFE Setup: You would typically create a second QEMU VM for the PFE and link them via a specific internal bridge configuration, or download a pre-packaged vQFX GNS3 appliance file (.gns3a) which automates the linking.
This is a critical distinction. The vQFX architecture is split: If you are using GNS3, the setup involves
Without a linked PFE, this image is functionally a "route reflector" or a management node – it cannot forward traffic.