The vqfx202r110reqemuqcow2 keyword points to the release. However, several community projects like containerlab issue a cautionary note: the public vQFX image downloadable from the Juniper portal may be versioned 20.2 but internally is a 19.4 system. The RE image, vqfx-20.2R1.10-re-qemu.qcow2 , is the control plane component for this version. You can verify the version once booted using the show version command.
Because the QCOW2 uses copy-on-write natively, ContainerLab can spawn 20 leaves instantly without consuming 200GB of disk space.
The "vqfx202r110reqemuqcow2 exclusive" keyword is a technical alias for a powerful, multi-layered toolkit. It represents the Juniper vQFX virtual switch—a free, highly capable emulation of the enterprise-grade QFX10000—packaged in the efficient QCow2 disk image format for QEMU-based hypervisors. The "exclusive" aspect not only refers to a technical locking mechanism for disk images but also to the privileged access this knowledge provides to high-level network design, automation, and certification. vqfx202r110reqemuqcow2 exclusive
mkdir -p /opt/unetlab/addons/qemu/vqfxre-20.2R1.10-exclusive/ Use code with caution.
The "exclusive" image may boot faster than standard images, but still expect 2-3 minutes for the Juniper CLI to appear. Log in with root (no password). The vqfx202r110reqemuqcow2 keyword points to the release
After uploading the file via SFTP, run the fix permissions command: /opt/unetlab/wrappers/unl_wrapper -a fixpermissions Use code with caution. Copied to clipboard ⚠️ Important Considerations
The string vqfx202r110reqemuqcow2 might look like a random mash‑up of numbers and letters, but it tells a very specific technical story: You can verify the version once booted using
Developing Ansible, Salt, or Terraform playbooks against Junos doesn’t require forwarding packets. A fleet of RE‑only vQFX instances gives you a realistic Junos CLI and NETCONF interface with minimal overhead.
When deploying the vqfx202r110reqemuqcow2 image, the following virtual hardware is typically allocated:
.qcow2 (QEMU Copy-On-Write), optimized for use with the QEMU/KVM hypervisor .