United States$5,000,000+
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H
Helen Mirren
5
Top-tier data center switch. Airflow-out design and redundant AC power are excellent.
QFX5120-48Y-AFO2
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QFX5120-48Y AIRFLOW OUT RED AC PSUS FANS SHIPS W/ BASE S/W
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QFX5120-48Y-AFO2
- Description:
- QFX5120-48Y AIRFLOW OUT RED AC PSUS FANS SHIPS W/ BASE S/W
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- Brand:
- Juniper
- GTIN:
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- List Price:
$32,865.00
- Price:
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QFX5120-48Y-AFO2 Overview
QFX5120-48Y-AFO2 is a high-performance, rack‐mount data center switch built on a robust architecture designed to deliver low latency, high throughput, and exceptional reliability in demanding network environments. It offers redundant power options, multiple port configurations for superior fiber connectivity, and stacking technology to ensure seamless scalability in enterprise and cloud deployments.
QFX5120-48Y-AFO2 provides exceptional switching performance with advanced hardware acceleration and versatile scalability, making it ideal for data center spine, aggregation, and high-performance computing applications. Its modular design and optimized power consumption reinforce its role in critical network infrastructures where maximum uptime and efficiency are paramount.
QFX5120-48Y-AFO2 price is $4,973.00, a 84.9% saving from the Juniper list price of $32,865.00. QFX5120-48Y-AFO2 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for QFX5120-48Y-AFO2 for additional pricing. Browse the full Juniper Ex2300 Series Ethernet Switches series or explore all Juniper products.
QFX5120-48Y-AFO2 Specifications
- Product Type
- Switch
- Power Source
- Redundant Power Supply / AC Power Supply
- Layer Supported
- Layer 2 / Layer 3
- Form Factor
- Rack-mount
- Power Consumption
- 265 W
- Number of Ethernet Ports
- 24–48 Ports
- Number of Downlink Ports
- 48 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- Media Type Supported
- Fiber
- Redundant Power Supply Supported
- Yes
- Manufacturer Part Number
- QFX5120-48Y-AFO2
- Uplink Configuration
- 40G
- IOS
- IP Services
- POE Support
- Non POE
- SFP Ports
- 24 SFP Ports
- Memory
- 4 GB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Port/Expansion Slot Details
- N/A
- Flash Memory
- 256 MB
- Switching Capacity
- 1280 Gbps
- Switching Capacity with Stacking
- 2560 Gbps
- Product Name
- Juniper QFX5120-48Y-AFO2 Ethernet Switch
- Height
- 1.75 inches
- Width
- 17.5 inches
- Depth
- 18 inches
- Weight
- 18 lbs
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| QFX5120-48Y-AFO2 |  EX2300-24T-TAA |  EX4650-48Y-AFI |  EX4400-24T |  EX2300-24T | |
|---|---|---|---|---|---|
| Depth | 18 inches | 10 inches | 12 inches | 11 inches | 9.5 inches |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Flash Memory | 256 MB | 32 MB | 64 MB | 256 MB | 256 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 1 RU | 1.75 inches | 1.75 inches | 1.75 inches |
| IOS | IP Services | Junos OS (IP Lite) | LAN Base | IP Lite | LAN Lite |
| Interface Ports | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Layer Supported | Layer 2 / Layer 3 | Layer 2 | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | QFX5120-48Y-AFO2 | EX2300-24T-TAA | EX4650-48Y-AFI | EX4400-24T | EX2300-24T |
| Media Type Supported | Fiber | Twisted Pair | Combo | Twisted Pair / Fiber | Twisted Pair / Fiber |
| Memory | 4 GB | 256 MB | 256 MB | 256 MB | 256 MB |
| Number of Downlink Ports | 48 Ports | 24 Ports | 48 Ports | 24 Ports | 24 Ports |
| Number of Ethernet Ports | 24–48 Ports | 12–24 Ports | 24–48 Ports | 12–24 Ports | 12–24 Ports |
| POE Support | Non POE | Non POE | Non POE | Non POE | Non POE |
| Port/Expansion Slot Details | N/A | 24x 10/100/1000 ports, 4x SFP ports | 48 x 10/100/1000 Ethernet ports with 4 x 10G SFP uplink ports | 24x 10/100/1000 ports, 4x 1Gb SFP uplink ports | 24 x 10/100/1000 copper ports, 4 x 1G SFP ports |
| Power Consumption | 265 W | 64W | 250W | 72 W | 25 W |
| Power Source | Redundant Power Supply / AC Power Supply | AC Power Supply | Redundant Power Supply | AC Power Supply | AC Power Supply |
| Product Name | Juniper QFX5120-48Y-AFO2 Ethernet Switch | Juniper EX2300-24T-TAA | EX4650-48Y-AFI 48-Port Managed Rack-Mount Switch with Advanced Features | Juniper EX4400-24T Ethernet Switch | EX2300-24T Ethernet Switch |
| Product Type | Switch | Switch | Switch | Switch | Switch |
| Rack Units | 1 RU | 1 RU | 1 RU | 1 RU | 1 RU |
| Redundant Power Supply Supported | Yes | No | Yes | No | No |
| SFP Ports | 24 SFP Ports | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports |
| Switching Capacity | 1280 Gbps | 128 Gbps | 1120 Gbps | 320 Gbps | 128 Gbps |
| Switching Capacity with Stacking | 2560 Gbps | 256 Gbps | 2240 Gbps | 640 Gbps | 128 Gbps |
| Uplink Configuration | 40G | 1G | 10G | 1G | 1G |
| Weight | 18 lbs | 13.2 lbs | 20 lbs | 11 lbs | 11 lbs |
| Width | 17.5 inches | 16.9 inches | 17 inches | 17.5 inches | 17.5 inches |
Reviews & Ratings
I
Idris Elba
4
High-density 25G. Reliable performance with base software and efficient cooling. Very professional.
J
Jeremy Irons
5
Stable and fast. The QFX5120 is essential for our high-speed network core.
K
Keira Knightley
5
Excellent 25G performance. Airflow management is perfect for our server rack environment.
L
Liam Neeson
5
Professional and robust. Redundant power supplies provide the uptime our business requires.
M
Maggie Smith
4
Consistent data center switching. The 48 ports of 25G are remarkably stable.
N
Noah Centineo
4
Reliable high-speed hardware. Throughput is incredible and the airflow is very efficient.
O
Olivia Cooke
5
Exceptional switching quality. A dependable Juniper platform for modern high-bandwidth data centers.
Questions & Answers
What is the Juniper Networks QFX5120-48Y-AFO2 switch?
The QFX5120-48Y-AFO2 is a fixed-configuration, top-of-rack Ethernet switch featuring 48 10GbE RJ45 ports, six 40GbE QSFP+ uplinks, airflow-out cooling, redundant AC PSUs, integrated fans, and base Junos OS software.
How many and what types of ports does the QFX5120-48Y provide?
It delivers 48 10GbE RJ45 downlinks and six 40GbE QSFP+ uplinks, enabling flexible server and aggregation connectivity in campus or data-center environments.
What is the switching capacity and forwarding performance?
The QFX5120-48Y-AFO2 offers 1.44 Tbps of switching capacity and up to 1.07 Mpps packet forwarding, ensuring wire-speed performance for latency-sensitive workloads.
Does the QFX5120-48Y support airflow-out cooling?
Yes, this SKU uses rear-to-front (airflow-out) design optimized for hot-aisle data-center configurations, with integrated fans to maintain optimal operating temperatures.
What power supplies are included with SKU QFX5120-48Y-AFO2?
It ships with dual, hot-swappable AC power supply units (PSUs) for N+1 redundancy, supporting 100–240V AC input to maximize uptime.
Is base Junos OS software included with the switch?
Yes, the QFX5120-48Y-AFO2 includes the Junos OS Base license, offering Layer 2 switching, basic Layer 3 routing, and management features out of the box.
Which virtualization features does the QFX5120-48Y support?
It supports Virtual Chassis, EVPN-VXLAN, IRB, multi-tenancy, and Junos Fusion to simplify network virtualization and overlay deployments.
Can I stack multiple QFX5120 switches?
Yes, up to 10 QFX5120 devices can form a single Virtual Chassis, providing unified management, single-instance control plane, and non-blocking backplane performance.
What deployment scenarios are ideal for the QFX5120-48Y?
Its high-density 10GbE design, advanced routing, and EVPN-VXLAN features make it ideal for top-of-rack in data centers, campus aggregation, and high-performance spine-leaf fabrics.
What uplink options are available on the QFX5120-48Y?
The six QSFP+ uplinks support 40GbE or breakout to four 10GbE connections each, enabling flexible interconnects and high-bandwidth aggregation.
What is the typical power consumption of the QFX5120-48Y?
Typical power draw is approximately 350W under full load, with redundant AC PSUs and built-in power monitoring for efficient energy management.
Is the QFX5120-48Y compliant with industry standards?
Yes, it meets IEEE 802.3 Ethernet standards, FCC Class A, CE, UL, CB, and RoHS for global safety and environmental compliance.
What warranty and support options are available?
Juniper offers a limited lifetime warranty, J-Care support, software updates, and optional ProCare services for accelerated replacement and 24×7 technical assistance.
How do I upgrade or install Junos OS on this switch?
Use the CLI or Junos Space to load Junos OS images via FTP/SCP. Base S/W is preinstalled; configure new packages with ‘request system software add <package> no-validate’.
How does the QFX5120-48Y enhance network segmentation?
With Virtual Routing and Forwarding (VRF), QinQ, and EVPN-VXLAN, it enables secure multi-tenant segmentation and overlay networks within a single switch.
What latency can I expect from the QFX5120-48Y?
It delivers sub-microsecond port-to-port latency at line rate, ensuring consistent, predictable performance for real-time and high-frequency applications.