Juniper QFX5120-32C-AFO — Used & Refurbished 100GbE Data Center Switch
The
Juniper QFX5120-32C-AFO is a high-performance, 1U data center switch designed for modern 40GbE and 100GbE fabrics. With
32 QSFP28 ports that support 40GbE or 100GbE, plus flexible breakout options, the QFX5120-32C-AFO is ideal for high-density leaf, spine, and aggregation roles in cloud, enterprise, and service provider environments.
This AFO variant provides
port-side exhaust airflow (AFO), making it well-suited for data centers built around front-to-back cooling designs. BrightStar Systems supplies fully tested,
used and refurbished QFX5120-32C-AFO switches, allowing you to scale 100GbE infrastructure while significantly reducing hardware costs compared to buying new.
Juniper QFX5120-32C-AFO Overview
The QFX5120-32C-AFO belongs to Juniper’s QFX5120 family of fixed-configuration switches optimized for EVPN-VXLAN fabrics and high-bandwidth interconnects. Its 32 QSFP28 ports can run as native 40GbE or 100GbE, or be broken out to multiple lower-speed interfaces, giving you flexibility when connecting servers, spines, or aggregation layers.
- 32 × QSFP28 ports supporting 40GbE or 100GbE
- Breakout support for fan-out configurations such as 4×10GbE or 4×25GbE per QSFP (where supported)
- 1U rackmount form factor for compact, high-density deployments
- AFO airflow (port-side exhaust) for hot-aisle containment and traditional front-to-back cooling
- Layer 2 and Layer 3 data center switching with EVPN-VXLAN capabilities
- Automation and telemetry with Junos OS, including support for scripting and common automation frameworks
- Redundant, hot-swappable power supplies and fans for improved uptime and serviceability
Technical Specifications
- Model: Juniper QFX5120-32C-AFO
- Ports: 32 × QSFP28 (40GbE/100GbE; breakout-capable where supported)
- Form Factor: 1U fixed-configuration data center switch
- Airflow: AFO (port-side exhaust, typically front-to-back cooling)
- Deployment Roles: Leaf, spine, aggregation, or data center interconnect
- Features: L2/L3 switching, EVPN-VXLAN, automation and telemetry
- High Availability: Redundant, hot-swappable power supplies and fan trays
- Operating System: Junos OS with support for automation, APIs, and monitoring
Ideal Use Cases for QFX5120-32C-AFO
- Spine switches in medium-to-large EVPN-VXLAN fabrics
- High-bandwidth leaf roles where 100GbE uplinks and flexible breakouts are required
- Data center aggregation and interconnect designs carrying east-west traffic at 40/100GbE
- Service provider and cloud edge environments that need compact, high-throughput switching
- Migration from older 40GbE platforms to more flexible, 100GbE-capable QFX infrastructure
Why Choose the QFX5120-32C-AFO for Your Data Center?
The QFX5120-32C-AFO combines 100GbE density, flexible breakout options, and EVPN-VXLAN capabilities in a compact 1U form factor. Its AFO airflow makes it a strong fit for racks designed around traditional front-to-back cooling, and its non-blocking architecture is well-suited for high east-west traffic patterns common in modern data centers.
For organizations standardizing on Juniper, the QFX5120-32C-AFO fits naturally into QFX-based fabrics and complements other QFX5120 and QFX5100 models used at the access or aggregation layers. Its support for Junos OS automation, telemetry, and EVPN-VXLAN makes it a solid choice for new greenfield deployments as well as phased upgrades from legacy hardware.
Related QFX5120 Resources
For architecture planning and model comparison, explore these QFX5120 resources from BrightStar Systems:
Other Juniper QFX5120 Switches We Stock
We maintain inventory across the broader QFX5120 portfolio so you can select the right mix of port density and airflow for each role in your fabric:
If you are comparing different QFX5120 models for a new deployment or refresh, evaluating airflow direction, optics compatibility, and port breakout options alongside your rack and fabric design will help you select the best mix of platforms for your environment.
Q: What is the maximum switching capacity of the QFX5120-32C-AFO?
A: The switch supports a total switching capacity of 6.4 Tbps, ensuring high-speed data transfer and scalability.
Q: Can I use this switch in a multi-cloud environment?
A: Yes, the QFX5120-32C-AFO is designed to integrate seamlessly into multi-cloud and hybrid-cloud environments with advanced automation features like EVPN-VXLAN.
Q: What type of airflow does this model support?
A: This model comes with Airflow Out (AFO), where cool air is drawn from the front and expelled at the rear, ideal for hot-aisle/cold-aisle configurations.
Q: Does the QFX5120-32C-AFO support automation?
A: Yes, it supports advanced automation through Juniper’s Junos OS and technologies like OpenConfig, MPLS, and EVPN-VXLAN.
Q: Is the switch compatible with different transceivers?
A: Yes, the QFX5120-32C-AFO supports a wide range of transceiver types including 10GbE, 25GbE, 40GbE, 50GbE, and 100GbE QSFP28.
Q: What redundancy features are available?
A: The QFX5120-32C-AFO has hot-swappable fans and dual redundant power supplies to ensure high availability and operational reliability.
Q: Is the switch stackable or part of a virtual chassis?
A: Yes, this model supports virtual chassis configurations, allowing for flexible scaling and simplified management.
