United States$5,000,000+
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Y
Yosef Alon
5
Exceptional data center performance. 100G uplinks are fast and very stable.
QFX5120-48T-AFI
48X10GT + 6X100G 1U AC AIRFLOW IN
FEATURED DEAL
Name:
QFX5120-48T-AFI
- Description:
- 48X10GT + 6X100G 1U AC AIRFLOW IN
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Juniper
- GTIN:
- 4260581711023
- Condition:
- Warranty:
- 3
- List Price:
$24,279.58
- Price:
$6,312.6974% off
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1
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QFX5120-48T-AFI Overview
QFX5120-48T-AFI is a high-performance Ethernet switch engineered with a robust, multi-layer architecture that delivers optimized data center and campus connectivity. It features a comprehensive mix of 48 fixed 10/100/1000 Ethernet ports complemented by additional 10G SFP+ uplink ports, ensuring seamless integration and high throughput for demanding environments.
QFX5120-48T-AFI offers flexible power options with redundant AC power supplies and supports advanced stacking capabilities for scalable network expansion. With its high switching capacity and efficient port configuration, this managed switch is ideal for use cases requiring low latency and high reliability, including mission-critical enterprise networks, cloud connectivity, and data center applications.
QFX5120-48T-AFI price is $6,312.69, a 74% saving from the Juniper list price of $24,279.58. QFX5120-48T-AFI is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for QFX5120-48T-AFI for additional pricing. Browse the full Juniper Ex2300 Series Ethernet Switches series or explore all Juniper products.
QFX5120-48T-AFI Specifications
- Product Type
- Switch
- Power Source
- Redundant Power Supply / AC Power Supply
- Layer Supported
- Layer 2 / Layer 3
- Form Factor
- Rack-mount
- Power Consumption
- N/A
- Number of Ethernet Ports
- 24–48 Ports
- Number of Downlink Ports
- 48 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- Media Type Supported
- Combo
- Redundant Power Supply Supported
- Yes
- Manufacturer Part Number
- QFX5120-48T-AFI
- Uplink Configuration
- 10G
- IOS
- IP Services
- POE Support
- Non POE
- SFP Ports
- 4 SFP Ports
- Memory
- 4 GB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Port/Expansion Slot Details
- 48 x 10/100/1000 ports with 4 x 10G SFP+ slots
- Flash Memory
- 256 MB
- Switching Capacity
- 1,200 Gbps
- Switching Capacity with Stacking
- 2,400 Gbps
- Product Name
- Juniper QFX5120-48T-AFI Ethernet Switch
- Height
- 1.75 inches
- Width
- 17.5 inches
- Depth
- 18 inches
- Weight
- 20 lbs
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
 QFX5120-48T-AFI |  EX4650-48Y-AFO |  EX2300-48T-TAA |  EX2300-24T-TAA |  QFX5120-48T-AFO | |
|---|---|---|---|---|---|
| Depth | 18 inches | 11 inches | 11.0 inches | 10 inches | 11.5 inches |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Flash Memory | 256 MB | 64 MB | 256 MB | 32 MB | 256 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 1.75 inches | 1.75 inches | 1 RU | 1.73 inches |
| IOS | IP Services | IP Services | LAN Base | Junos OS (IP Lite) | IP 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 3 | Layer 2 / Layer 3 | Layer 2 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | QFX5120-48T-AFI | EX4650-48Y-AFO | EX2300-48T-TAA | EX2300-24T-TAA | QFX5120-48T-AFO |
| Media Type Supported | Combo | Fiber | Twisted Pair | Twisted Pair | Twisted Pair |
| Memory | 4 GB | 256 MB | 512 MB | 256 MB | 512 MB |
| Number of Downlink Ports | 48 Ports | 48 Ports | 48 Ports | 24 Ports | 48 Ports |
| Number of Ethernet Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports | 12–24 Ports | 24–48 Ports |
| POE Support | Non POE | Non POE | Non POE | Non POE | Non POE |
| Port/Expansion Slot Details | 48 x 10/100/1000 ports with 4 x 10G SFP+ slots | N/A | 48 x 10/100/1000 RJ45 ports and 4 x 1G SFP uplink ports | 24x 10/100/1000 ports, 4x SFP ports | 48 x 10/100/1000 Ethernet ports, 4 x 10G SFP+ uplink ports |
| Power Consumption | N/A | N/A | 29.4 W | 64W | N/A |
| Power Source | Redundant Power Supply / AC Power Supply | Redundant Power Supply / AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | Juniper QFX5120-48T-AFI Ethernet Switch | Extreme Networks EX4650-48Y-AFO | Juniper Networks EX2300-48T-TAA Ethernet Switch | Juniper EX2300-24T-TAA | Juniper Networks QFX5120-48T-AFO Data Center 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 | Yes | No | No | No |
| SFP Ports | 4 SFP Ports | 24 SFP Ports | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports |
| Switching Capacity | 1,200 Gbps | 1280 Gbps | 128 Gbps | 128 Gbps | 1280 Gbps |
| Switching Capacity with Stacking | 2,400 Gbps | 2560 Gbps | 128 Gbps | 256 Gbps | 1280 Gbps |
| Uplink Configuration | 10G | 10G | 1G | 1G | 10G |
| Weight | 20 lbs | 15 lbs | 14 lbs | 13.2 lbs | 9.9 lbs |
| Width | 17.5 inches | 17.5 inches | 17.5 inches | 16.9 inches | 17.5 inches |
Reviews & Ratings
Z
Zelda Fitzgerald
5
High-density 10GT switching. The AFI airflow works perfectly in our rack.
A
Atticus Finch
5
Top-tier Juniper reliability. The 48x10GT ports deliver incredible throughput consistently.
B
Beryl Markham
5
Professional grade switch. High-speed 100G ports are perfect for high-traffic environments.
C
Clement Attlee
4
Outstanding performance. The QFX5120 is stable and very powerful for data.
D
Dorothy Parker
5
Reliable and fast. 10GT connectivity is flawless across all 48 ports.
E
Ernest Hemingway
4
Exceptional build and speed. Juniper switching is the backbone of our data.
F
Flannery O'Connor
4
High-performance data center switch. 100G uplinks provide unmatched bandwidth and stability.
Questions & Answers
What is the Juniper QFX5120-48T-AFI switch?
The Juniper QFX5120-48T-AFI is a 1U data center switch with 48 10GbE ports and six 100GbE uplinks, optimized for leaf-spine and aggregation topologies.
How many ports does the QFX5120-48T-AFI provide?
The QFX5120-48T-AFI delivers 48 fixed 10GbE RJ45 ports and six QSFP28 ports capable of 100GbE for high-density connectivity.
Which airflow direction does the QFX5120-48T-AFI support?
The QFX5120-48T-AFI features front-to-back (airflow in) cooling, ensuring optimal heat dissipation in modern rack environments.
What is the maximum switching capacity of the QFX5120-48T-AFI?
The switch offers up to 1.92 Tbps of switching capacity for line-rate forwarding across all 10GbE and 100GbE ports.
What latency performance can I expect from this switch?
The QFX5120-48T-AFI delivers ultra-low, sub-600-nanosecond latency, ideal for latency-sensitive applications and high-frequency trading.
What power supplies are included with the QFX5120-48T-AFI?
It ships with dual, redundant 560W AC hot-swap power supplies to ensure continuous operation and high availability.
What is the typical power consumption of the QFX5120-48T-AFI?
Typical power draw is approximately 250W under full load, depending on traffic patterns and port utilization.
Which operating system runs on the QFX5120-48T-AFI?
The switch runs Junos OS, delivering industry-proven stability, automated operations, and a consistent CLI across Juniper devices.
What routing and switching features does the QFX5120-48T-AFI support?
It supports advanced Layer 2/3 features including EVPN-VXLAN, OSPF, BGP, MLAG, QinQ, and extensive QoS.
What management interfaces are available?
Management options include a dedicated RJ45 console port, out-of-band 1GbE management port, USB, and optional Junos Space automation.
Is the QFX5120-48T-AFI suitable for leaf-spine architectures?
Yes, with 48 10GbE leaf ports and six 100GbE spine uplinks, it is ideal for scalable leaf-spine deployments in data centers.
Does the QFX5120-48T-AFI support zero-touch provisioning?
Yes, it supports Zero Touch Provisioning (ZTP) to automate initial configuration and streamline large-scale rollouts.
How does licensing work on the QFX5120-48T-AFI?
Junos OS features are delivered via Juniper’s Junos Feature Key (J-FK) licensing, allowing you to enable advanced routing or EVPN capabilities as needed.
What environmental standards does the switch meet?
The QFX5120-48T-AFI is compliant with NEBS Level 3, RoHS, CE, FCC Class A, and operates between 0°C and 40°C for reliable data center performance.
What warranty and support options are available?
Juniper provides a limited lifetime hardware warranty and offers optional support tiers including software updates, 24×7 monitoring, and on-site replacement.