Juniper QFX5120-32C-AFI — Used & Refurbished 100GbE Data Center Switch
The
Juniper QFX5120-32C-AFI is a high-performance, 1U data center switch designed for modern 40GbE and 100GbE leaf, spine, and collapsed-core architectures. With
32 QSFP28 ports that support 40GbE or 100GbE, plus flexible breakout options, the QFX5120-32C-AFI is ideal for high-density data center fabrics, cloud environments, and service provider deployments that demand predictable throughput and low latency.
BrightStar Systems supplies fully tested,
used and refurbished QFX5120-32C-AFI switches backed by our
1-Year In-House Warranty, helping you scale 100GbE infrastructure at a fraction of new hardware cost.
Juniper QFX5120-32C-AFI Overview
The QFX5120-32C-AFI is part of Juniper’s QFX5100/QFX5120 family of fixed-configuration switches, optimized for EVPN-VXLAN fabrics and high-bandwidth data center interconnects. Its 32 QSFP28 ports can operate as 40GbE or 100GbE, or be broken out into multiple lower-speed interfaces, enabling flexible topologies without sacrificing density.
- 32 × QSFP28 ports supporting 40GbE or 100GbE
- Port breakout options (for example, 4×10GbE or 4×25GbE per QSFP in supported modes)
- 1U rackmount form factor for high-density deployments
- Front-to-back (AFI) airflow for cold-aisle intake, hot-aisle exhaust designs
- Layer 2 and Layer 3 data center switching with EVPN-VXLAN
- Automation and telemetry via Junos OS, including support for scripting and common automation tools
- Redundant, hot-swappable power supplies and fans for high availability
Technical Specifications
- Model: Juniper QFX5120-32C-AFI
- Ports: 32 × QSFP28 (40GbE/100GbE; breakout-capable where supported)
- Form Factor: 1U fixed-configuration switch
- Airflow: AFI (port-side intake, front-to-back airflow)
- Deployment Roles: Leaf, spine, or high-bandwidth aggregation
- Features: L2/L3 switching, EVPN-VXLAN, automation and telemetry with Junos OS
- High Availability: Redundant, hot-swappable power supplies and fans
- Software: Runs Junos OS with support for automation frameworks and open APIs
Ideal Use Cases for QFX5120-32C-AFI
- Spine switches in medium to large EVPN-VXLAN fabrics
- Leaf switches in high-density 25/100GbE server access designs (via breakout)
- Data center aggregation and interconnect roles where 100GbE bandwidth is required
- Service provider edge or core environments that demand compact, high-throughput switching
- Upgrade paths from older 40GbE-only platforms to flexible 40/100GbE fabrics
Why Buy Refurbished QFX5120-32C-AFI Switches From BrightStar Systems?
BrightStar Systems specializes in high-quality, pre-owned Juniper hardware. When you source a QFX5120-32C-AFI from us, you get more than just a switch — you get engineering expertise and a predictable, tested platform.
- Significant cost savings compared to new hardware
- In-house testing on every QFX5120-32C-AFI prior to shipment
- 1-Year In-House Warranty included on all Juniper switches
- Juniper-focused expertise to assist with model selection, optics, and design questions
- Fast turnaround times for quotes, configuration, and shipping
Related QFX5120 Resources
For deeper planning, comparison, and architecture decisions, explore these Juniper QFX resources from BrightStar Systems:
Other Juniper QFX5120 Switches We Stock
We maintain inventory across the broader QFX5120 family, so you can mix models to match airflow, port density, and role in your fabric:
If you’re unsure whether the
QFX5120-32C-AFI is the right fit for your environment, our engineering team can help you compare it with other QFX models and design a cost-effective upgrade path.
Q: What is the port configuration of the QFX5120-32C-AFI switch?
A: This switch features 32 x 100GbE QSFP28 ports, providing high-speed connectivity and scalability for large-scale network environments.
Q: What does Airflow In (AFI) mean for cooling?
A: Airflow In (AFI) means the switch is designed to pull air from the front to the rear, which is essential for maintaining optimal thermal management in data centers with front-to-back cooling setups.
Q: What kind of automation support does the switch offer?
A: The QFX5120-32C-AFI supports Zero Touch Provisioning (ZTP), Junos OS automation, and open programmability via Python, helping simplify and streamline network operations.
Q: Is the QFX5120-32C-AFI suitable for large-scale data centers?
A: Yes, with a high switching capacity of up to 6.4 Tbps, low latency performance, and advanced Layer 2 and Layer 3 capabilities, it is ideal for large-scale data centers, cloud environments, and service provider networks.
Q: What operating system does the QFX5120-32C-AFI use?
A: The switch runs on Junos OS, a robust and secure operating system known for its high performance, flexibility, and comprehensive networking features.
