Vqfx-20.2r1.10-re-qemu.qcow2 ◆ (NEWEST)

Improved convergence times for routing protocols like and OSPF .

This image is used for:

The RE image cannot forward transit traffic on its own. It requires a dedicated, internal network link to a running PFE instance to activate its virtual data plane interfaces (xe-0/0/0, et-0/0/0, etc.). Decoding the Filename

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This guide provides an overview and instructions for using the file.

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| Use Case | Viability | | :--- | :--- | | | ❌ 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. | Vqfx-20.2r1.10-re-qemu.qcow2

Refined telemetry capabilities for modern network monitoring.

: This is the Routing Engine (RE) , which runs the Junos control plane. For a functional vQFX setup, it must be paired with a Packet Forwarding Engine (PFE) image (e.g., vqfx-20.2R1.10-pfe-qemu.qcow2 ).

em1 : Internal link to communicate with the PFE image (crucial for the switch to function). Useful Resources Improved convergence times for routing protocols like and

Junos OS initializes many daemons simultaneously during boot, causing a temporary CPU spike on the host machine.

Unlike a single-file virtual machine, the vQFX typically operates using a dual-VM architecture to simulate the high-performance hardware of the QFX series:

Username root , Password Juniper (capital J). RAM Requirement: 1024 MB. Decoding the Filename : This guide provides an

Handles the control plane, including routing protocols (BGP, OSPF), management (SSH, SNMP), and the Junos CLI.

Note: For a functional switch, you must also link this instance to a corresponding PFE instance. Benefits of the 20.2R1.10 Release