| Problem | Likely Fix |
|---------|-------------|
| RE not booting | Ensure image name matches EVE-NG expectation (hda.qcow2). Check KVM acceleration (egrep -c '(vmx\|svm)' /proc/cpuinfo). |
| PFE not showing up | Verify that the PFE node is powered on after the RE node. Ensure they are connected via a vEth link (not a bridged network). |
| High CPU on host | Limit RE to 2 vCPUs. Disable set protocols lldp to reduce background tasks. |
| Cannot commit config | Run request system storage cleanup. 20.2R1.10 has a known log rotation bug. |
| Licensing warning | Apply a free trial license from Juniper’s website – the image will run in limited mode for 60 days without one. |
The filename VQFX-20.2R1.10-RE-QEMU.qcow2 suggests several pieces of information:
RE: This likely stands for "Routing Engine," indicating that this image pertains to the routing or control plane aspect of the appliance. Vqfx-20.2r1.10-re-qemu.qcow2
QEMU: Stands for Quick Emulator, which is an open-source emulator that allows one to run a variety of operating systems on top of a host operating system. The presence of "QEMU" in the filename suggests that this image is intended to run on QEMU or possibly on a platform that supports QEMU, such as KVM (Kernel-based Virtual Machine) on Linux.
.qcow2: This is the file format. QEMU Copy On Write image file is a virtual disk image format used by QEMU. It supports dynamic and fixed-size images and is compatible with KVM. | Problem | Likely Fix | |---------|-------------| |
Juniper typically provides these images via the official Juniper Download site (requires a support contract) or a Juniper vLabs trial. If you have access, search for "vQFX 20.2R1.10."
Given the version is 20.2 (circa 2020), it is outdated for production but useful for: RE : This likely stands for "Routing Engine,"
| Use Case | Viability | | :--- | :--- | | Production Data Center | ❌ Not recommended. Vulnerabilities, missing features (EVPN-VXLAN enhancements, MACsec). | | Lab / Certs (JNCIP-DC, JNCIE) | ✅ Good. Many training materials still reference 20.2. | | Home EVPN Lab | ⚠️ Limited. 20.2 supports EVPN but has known bugs (BUM flooding, ARP suppression). | | Network Automation Testing (Ansible, PyEZ) | ✅ Yes. Junos 20.2 has stable NETCONF/REST APIs. | | CI/CD Pipeline | ⚠️ Risky. Use latest (23.4+) for CI. |
For more advanced features, consider using a programming language like Python with the libvirt or pyqemu libraries, which offer more straightforward APIs for managing VMs.
| Image | Purpose |
|-------|---------|
| vqfx-20.2r1.10-pfe-qemu.qcow2 | Packet Forwarding Engine (required for switching/routing data) |
| vqfx-20.2r1.10-veos (community) | Arista vEOS as L2 leaf (mixed-vendor lab) |
| vjunos-switch-22.2R1.11.qcow2 | Newer vJunos-switch (unified RE+PFE) – simpler but heavier |
| vqfx-10000-21.1R1-re-qemu.qcow2 | Updated version with better EVPN support |