Juniper QFX5120-48T-AFI — Used & Refurbished 10GbE Top-of-Rack Switch
The
Juniper QFX5120-48T-AFI is a 1U, fixed-configuration data center switch designed for high-density 10GbE top-of-rack deployments. With
48 dual-speed 1GbE/10GbE RJ-45 ports and up to
six 40/100GbE uplink ports, it delivers non-blocking throughput and low latency for modern spine–leaf fabrics and high-performance enterprise networks.
BrightStar Systems supplies fully tested,
used and refurbished QFX5120-48T-AFI switches, allowing you to upgrade to 10GbE access and 40/100GbE uplinks at a fraction of the cost of new hardware.
Juniper QFX5120-48T-AFI Overview
The QFX5120-48T-AFI is part of Juniper’s QFX5120 family, optimized for EVPN-VXLAN data center fabrics. It features 48 copper access ports for server connectivity and high-speed QSFP-based uplinks for aggregation or spine connectivity. The AFI variant uses
port-side intake (front-to-back) airflow, aligning with cold-aisle/front-rack intake cooling designs.
- 48 × 1GbE/10GbE RJ-45 ports for server and access connectivity
- Up to 6 × 40/100GbE QSFP+/QSFP28 uplink ports (model/line-card dependent)
- 1U rackmount form factor for dense top-of-rack deployments
- AFI airflow (port-side intake, front-to-back cooling)
- L2/L3 switching with EVPN-VXLAN support
- Junos OS with automation, telemetry, and open APIs
- Redundant, hot-swappable power supplies and fans for high availability
Technical Specifications
- Model: Juniper QFX5120-48T-AFI
- Access Ports: 48 × 1GbE/10GbE RJ-45 (10GBASE-T)
- Uplinks: Up to 6 × 40GbE/100GbE QSFP+/QSFP28 (depending on configuration)
- Form Factor: 1U fixed-configuration switch
- Airflow Direction: AFI (port-side intake, front-to-back)
- Switching Features: Layer 2 and Layer 3, EVPN-VXLAN, MC-LAG
- Management: Junos OS with CLI, automation tools, and telemetry
- Power & Cooling: Redundant, hot-swappable PSUs and fan trays
Ideal Use Cases for QFX5120-48T-AFI
- Top-of-rack (ToR) 10GbE server access with 40/100GbE uplinks into a spine or aggregation layer
- Enterprise and campus distribution where 10GbE access and 100GbE uplinks are required
- EVPN-VXLAN fabrics using the QFX5120 as a leaf switch
- Migration from 1GbE to 10GbE copper access while preserving existing cabling
- Brownfield upgrades where airflow and rack depth constraints favor 1U copper ToR switches
Why Choose the QFX5120-48T-AFI?
The QFX5120-48T-AFI offers a balance of high-density 10GbE copper access and flexible 40/100GbE uplinks, making it a strong choice for environments standardizing on spine–leaf designs with EVPN-VXLAN. Its AFI airflow integrates cleanly into cold-aisle intake designs, and its non-blocking architecture supports demanding east–west traffic patterns in virtualized and cloud-native workloads.
For organizations with existing Juniper QFX and MX infrastructure, the QFX5120-48T-AFI fits naturally into end-to-end Junos environments, simplifying operations, automation, and troubleshooting.
Related QFX5120 Resources
For planning and comparison across QFX5120 models and broader Juniper architectures, review these resources:
Other Juniper QFX5120 Switches We Stock
We also stock other QFX5120 models to match different interface and airflow requirements:
Q1: What is the maximum switching capacity of the QFX5120-48T-AFI?
A1: The switch offers a maximum switching capacity of up to 3.2 Tbps, ensuring high-speed data transfer and minimal bottlenecks.
Q2: How many uplink ports are available on this switch?
A2: It features 6 x 40GbE QSFP+ uplink ports for flexible and high-bandwidth connectivity options.
Q3: Is the switch energy-efficient?
A3: Yes, the QFX5120-48T-AFI incorporates advanced power management technologies to minimize energy consumption without compromising performance.
Q4: What security features does this switch offer?
A4: It includes advanced threat detection, and mitigation capabilities, and supports multiple security protocols to protect your network infrastructure.
Q5: Does the switch support future scalability?
A5: Absolutely. Its modular design allows for easy upgrades and expansions to accommodate growing network demands.
