REFURBISHED
Juniper
Juniper QFX5120-48Y-AFO/AFI Refurbished — 48x 25GbE + 8x 100GbE Switch
MPN: QFX5120‑48Y‑AFO
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Lifetime
Warranty
ISO 9001
Certified Testing
R2v3
Responsible Refurb
25+
Years
5K+
Customers
ISO
Certified
✓
Tested
Every WhaleyComm unit is professionally tested, reset to factory defaults, and certified by our in-house engineers — the same standard trusted by 5,000+ organisations across 25 years. Not a refurb marketplace. A certified lifecycle partner.
Wire-rate 25GbE density, 100GbE uplinks, and enterprise-grade reliability — professionally tested and ready to deploy.
This refurbished Juniper QFX5120-48Y is available in both AFO (front-to-back) and AFI (back-to-front) airflow configurations, giving data center teams the flexibility to match their rack orientation without compromising performance. Each unit has been professionally tested, reset to factory defaults, and inspected through WhaleyComm's ISO 9001-certified process before shipment. With 48 x 25GbE SFP28 server-facing ports and 8 x 100GbE QSFP28 uplink ports, this switch delivers the high-density, low-latency connectivity modern data center and campus core environments demand.Built on Juniper's Q5 ASIC, the QFX5120-48Y delivers wire-rate forwarding across all ports with deep packet buffers engineered to absorb traffic bursts and eliminate microburst-driven drops. The switch runs Junos OS and supports a comprehensive protocol stack including OSPF, BGP, EVPN-VXLAN, and MPLS, making it a capable leaf, spine, or aggregation node in any modern fabric architecture. MACsec encryption secures east-west and north-south traffic at line rate, while built-in streaming telemetry and Zero Touch Provisioning simplify operations at scale. Redundant hot-swappable fans and power supplies ensure high availability in production environments.
Purchasing refurbished Juniper hardware from WhaleyComm delivers the same proven QFX5120-48Y platform at a fraction of new list price, backed by a Lifetime Warranty and 25 years of enterprise hardware expertise. With ISO 9001, R2v3, and e-Stewards certifications, WhaleyComm is the trusted source for responsible, reliable data center infrastructure for more than 5,000 enterprise customers worldwide.
Technical Specifications
Brand
Juniper
Model
QFX5120-48Y
MPN
QFX5120-48Y-AFO / QFX5120-48Y-AFI
Condition
Refurbished
Product Type
Data Center Switch
25GbE Ports
48 x SFP28
100GbE Uplink Ports
8 x QSFP28
ASIC
Juniper Q5
Airflow (AFO)
Front-to-back (port side to non-port side)
Airflow (AFI)
Back-to-front (non-port side to port side)
Layer 2 Protocols
OSPF, BGP, EVPN-VXLAN, MPLS
Security
MACsec encryption
Operating System
Junos OS
High Availability
Redundant hot-swappable fans and power supplies
Automation
Streaming telemetry, Zero Touch Provisioning (ZTP), Junos scripting
Ideal Use Cases
Top-of-Rack Server Access
The 48 x 25GbE SFP28 ports make the QFX5120-48Y an ideal top-of-rack switch for high-density server deployments, providing each server with dedicated 25GbE connectivity and eliminating oversubscription at the access tier.
Leaf Node in Spine-Leaf Fabric
With 8 x 100GbE QSFP28 uplinks, the QFX5120-48Y fits naturally as a leaf node connecting to 100GbE spine switches in a scalable, non-blocking Clos fabric architecture.
EVPN-VXLAN Overlay Fabric
Native support for EVPN-VXLAN enables the QFX5120-48Y to serve as a VXLAN tunnel endpoint, supporting multi-tenant cloud environments and seamless workload mobility across the data center.
Campus Core or Aggregation
The combination of 25GbE access density and 100GbE uplinks makes this switch suitable as a campus core or distribution layer node where high throughput and advanced Layer 3 routing are required.
Secure Data Center Interconnect
MACsec encryption at line rate enables the QFX5120-48Y to secure east-west traffic between racks and data center segments without introducing forwarding latency.
Automated and Telemetry-Driven Network Operations
Streaming telemetry, ZTP, and Junos OS automation capabilities make the QFX5120-48Y well suited for teams adopting infrastructure-as-code and intent-based networking practices.
What's Included
Juniper QFX5120-48Y Switch (AFO or AFI airflow as selected)
Power Supply (installed)
Fan Modules (installed)
Rack Mount Ears
Certificate of Testing
Lifetime Warranty — No Time Limits. No Questions.
Every WhaleyComm unit ships with a Lifetime Warranty. If it fails under normal operating conditions at any point, we replace it. We have stood behind our hardware for 25 years and 5,000+ customers — that is not a marketing line, it is our operating standard.
Compatibility Details
Review supported optics, cables, software, management protocols, and environment-specific compatibility guidance.
COMPATIBLE PLATFORMS
✓
Fan modules and power supplies are specific to the QFX5120 platform — AFO and AFI variants require matched-airflow accessories.
COMPATIBLE OPTICS & CABLES
✓
The Juniper QFX5120-48Y-AFO and AFI are compatible with standard SFP28 25GbE and QSFP28 100GbE transceivers and DAC or AOC cables.
SOFTWARE COMPATIBILITY
✓
The switch runs Junos OS and is designed to interoperate within Juniper QFX fabric architectures alongside other QFX5120, QFX5200, and QFX10000 series devices.
For compatibility verification specific to your environment, contact our engineering team: +1 214 607-4800 or sales@whaleycomm.com
Shipping & Returns
Clear fulfilment, tracking, return, warranty, and support information for enterprise hardware orders.
Shipping
Orders typically ship within 1-2 business days after payment confirmation. Tracking details are shared once the order has been dispatched.
Returns
Eligible products can be returned according to WhaleyComm's return policy. For DOA, warranty, or product-related issues, contact the support team for replacement or resolution.
Frequently Asked Questions
Product-specific answers about compatibility, testing, warranty, fulfilment, and purchase confidence.
The only difference is airflow direction. The AFO model moves air from front to back, exhausting heat into the hot aisle — standard for most enterprise data center deployments. The AFI model moves air from back to front, supporting cold-aisle containment configurations. Both models are otherwise identical in port count, performance, and protocol support.
Yes. The QFX5120-48Y runs Junos OS and supports a full Layer 2 and Layer 3 protocol stack including OSPF, BGP, EVPN-VXLAN, and MPLS. It can be deployed as a pure switching platform, a routed access device, or a VXLAN tunnel endpoint depending on your architecture.
Yes. The switch supports redundant hot-swappable fan modules and power supplies, allowing failed components to be replaced without taking the unit offline. This makes it suitable for environments with strict uptime requirements.
Yes. Every WhaleyComm unit ships with a Lifetime Warranty. If it fails under normal operating conditions at any point, we replace it at no cost — no time limits, no questions asked.
Every unit goes through our ISO 9001-certified testing process: full power-on diagnostics, port-by-port functionality testing, firmware verification, factory reset, and final inspection. A Certificate of Testing ships with every unit.
Juniper QFX5120-48Y-AFO/AFI Refurbished — 48x 25GbE + 8x 100GbE Switch
$7,950.00
Juniper
Juniper QFX5120-48Y-AFO/AFI Refurbished — 48x 25GbE + 8x 100GbE Switch
MPN: QFX5120‑48Y‑AFO
$7,950.00
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