Support for Junos PyEZ, Ansible, and NETCONF, allowing engineers to validate automation scripts before deploying to live QFX5100/5200 series switches.
| Device | Primary Role | Best Used For | |--------|--------------|----------------| | | Layer 2/3 switching | Data center fabric (EVPN‑VXLAN), spine‑leaf topologies | | vMX | Routing (edge/core) | Service provider routing, MPLS, BGP route reflection | | vSRX | Firewall + routing | Security policies, VPNs, next‑gen firewall testing | | vRR | Route reflection | Large‑scale BGP route reflection |
Setting up vQFX is not always smooth. Here are some common issues and their solutions:
No. Not silence— thundering quiet . The virtual links were down. He checked the bridge interfaces. The MACs were there. The VLAN tags matched. But the vqfx202 was stubborn as a mule. vqfx202r110reqemuqcow2 work
For the .qcow2 image to "work" or function correctly, it must be deployed within a hypervisor or network emulation tool.
If you are studying for the or JNCIE , the vqfx202r110 RE image is an essential tool. It is far more capable than the lighter vmx images for switching-specific features like spanning-tree and VXLAN. It is a "workhorse" image that, once configured correctly, provides a high-fidelity sandbox. If you'd like to dive deeper into the setup, tell me: Which topology are you trying to build?
The most critical barrier to making vqfx-20.2R1.10-re-qemu.qcow2 work is the assumption that it can run as a standalone virtual machine. Unlike simple virtual appliances, the vQFX mimics physical data center switches by dividing operations into two distinct entities: Support for Junos PyEZ, Ansible, and NETCONF, allowing
serves as a popular candidate, offering a virtualized replica of physical QFX10000 high-performance hardware.
Lightweight. It needs exactly 1024 MB RAM and 1 vCPU . The Packet Forwarding Engine (PFE)
Log into the Junos CLI and verify chassis network services via show chassis fpc . If the slot shows "Offline," restart the PFE instance entirely. Not silence— thundering quiet
commit complete.
| Component | Minimum (Testing only) | Recommended (Production‑like lab) | |-----------|------------------------|------------------------------------| | | 1–2 GB | 4–8 GB | | PFE RAM | 1 GB | 4–8 GB | | RE vCPUs | 1 | 2–4 | | PFE vCPUs | 1 | 2–4 | | Storage | 10 GB per image | 20–40 GB | | Host RAM | 8 GB | 16–32 GB |