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QFX5100-48S-D-3AFO
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QFX5100, 48 SFP+/SFP ports, 6 QSFP+ ports, redundant fans, 2...
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QFX5100-48S-D-3AFO
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- QFX5100, 48 SFP+/SFP ports, 6 QSFP+ ports, redundant fans, 2 DC power supplies, front to back airflow
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QFX5100-48S-D-3AFO Overview
QFX5100-48S-D-3AFO is a high-performance, data center-class switch designed with a robust architecture that supports both Layer 2 and Layer 3 networking. Built for demanding environments, it offers versatile power options including AC input with redundant power supply capability, ensuring uninterrupted operations and exceptional reliability.
Featuring 48 SFP ports for fiber connectivity alongside 4 high-speed 40GbE uplink ports, the QFX5100-48S-D-3AFO delivers impressive performance and scalability. Its stacking support and efficient switching capacity make it an ideal choice for modern data centers, campus networks, and enterprise environments that require secure, high-density, and low-latency connectivity.
QFX5100-48S-D-3AFO price is is available on request. Get immediate quote.
Request bulk order quote for QFX5100-48S-D-3AFO for additional pricing. Browse the full Juniper Qfx5100 Series Switches series or explore all Juniper products.
QFX5100-48S-D-3AFO 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
- QFX5100-48S-D-3AFO
- Uplink Configuration
- 10G
- IOS
- IP Services
- POE Support
- Non POE
- SFP Ports
- 48 SFP Ports
- Memory
- 256 MB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Port/Expansion Slot Details
- 48 x 1/10GbE SFP ports, 4 x 40GbE QSFP+ uplink ports
- Flash Memory
- 64 MB
- Switching Capacity
- 1280 Gbps
- Switching Capacity with Stacking
- N/A
- Product Name
- Juniper QFX5100-48S-D-3AFO
- Height
- 1.75 inches
- Width
- 17.5 inches
- Depth
- 18 inches
- Weight
- 20 lbs
QFX5100-48S-D-3AFO Use Case
High-Density Leaf Switch for Enterprise Data Centers
In a large-scale enterprise data center deploying a spine-leaf architecture, the QFX5100-48S-D-3AFO-QFX5100 with 48 SFP+/SFP ports and 6 QSFP+ ports delivers high-density 10GbE access and 40GbE uplinks. Equipped with redundant fans, dual DC power supplies, and front-to-back airflow, it ensures low latency, scalable throughput and uninterrupted operations under heavy virtualization and East-West traffic.
Low-Latency Fabric for High-Performance Computing Clusters
A research institution’s HPC cluster uses the QFX5100-48S-D-3AFO-QFX5100 as the core network fabric to interconnect hundreds of compute nodes at sub-microsecond latency. The switch’s 48 SFP+/SFP ports, 6 QSFP+ ports, redundant fans and dual DC power supplies guarantee maximum uptime, predictable performance and simplified maintenance for compute-intensive simulations.
Metro-Edge Aggregation for Telecom Service Providers
In a telecom central office or edge POP, the QFX5100-48S-D-3AFO-QFX5100 aggregates multiple 10GbE/40GbE circuits into a compact 1U chassis. With front-to-back airflow, hot-swappable fans and dual DC power supplies, it delivers carrier-grade reliability, high port density and energy-efficient operation in harsh environments.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| QFX5100-48S-D-3AFO |  QFX5100-24Q-D-3AFO |  QFX5100-48S-D-3AFI |  QFX5100-48T-AFI |  QFX5100-24Q-AFO | |
|---|---|---|---|---|---|
| Depth | 18 inches | N/A | 17.5 inches | 18 inches | 18.5 inches |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 40G |
| Flash Memory | 64 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Form Factor | Rack-mount | Rack-mount / N/A | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | N/A | 1.75 inches | 1.75 inches | 1.75 inches |
| IOS | IP Services | N/A | IP Services | IP Services | Junos OS |
| Interface Ports | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | N/A |
| Layer Supported | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | QFX5100-48S-D-3AFO | QFX5100-24Q-D-3AFO | QFX5100-48S-D-3AFI | QFX5100-48T-AFI | QFX5100-24Q-AFO |
| Media Type Supported | Fiber | Fiber | Fiber | Twisted Pair | Fiber |
| Memory | 256 MB | 512 MB | 4 GB | 4 GB | 256 MB |
| Number of Downlink Ports | 48 Ports | 24 Ports | 48 Ports | 48 Ports | 24 Ports |
| Number of Ethernet Ports | 24–48 Ports | 12–24 Ports | 24–48 Ports | 24–48 Ports | 12–24 Ports |
| POE Support | Non POE | Non POE | Non POE | Non POE | Non POE |
| Port/Expansion Slot Details | 48 x 1/10GbE SFP ports, 4 x 40GbE QSFP+ uplink ports | N/A | N/A | 48 x 10GBase-T ports and 4 x 40G QSFP+ uplink ports | 24 x 40GbE QSFP+ Ports |
| Power Consumption | 265 W | N/A | 330W | 220W | 200 W |
| Power Source | Redundant Power Supply / AC Power Supply | Redundant Power Supply / AC Power Supply / N/A | Redundant Power Supply / AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | Juniper QFX5100-48S-D-3AFO | Juniper Networks QFX5100-24Q-D-3AFO Data Center Switch | Juniper Networks QFX5100-48S-D-3AFI | Juniper Networks QFX5100-48T-AFI Ethernet Switch | Juniper QFX5100-24Q-AFO |
| 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 | Yes | No | No |
| SFP Ports | 48 SFP Ports | 4 SFP Ports | 48 SFP Ports | 4 SFP Ports | N/A |
| Switching Capacity | 1280 Gbps | 1280 Gbps | 1280 Gbps | 1440 Gbps | 1440 Gbps |
| Switching Capacity with Stacking | N/A | 1280 Gbps | 2560 Gbps | N/A | N/A |
| Uplink Configuration | 10G | 40G | 10G | 10G | 40G |
| Weight | 20 lbs | N/A | 18 lbs | 19 lbs | 12 lbs |
| Width | 17.5 inches | N/A | 19 inches | 17.5 inches | 17.5 inches |
Reviews & Ratings
N
Nathaniel Orr
5
Consistent SFP+ performance.
W
Wallace Mercer
4
Reliable DC powered option.
I
Isaac Thornhill
5
Easy to integrate.
G
Gerald Phelps
5
Good operational stability.
Questions & Answers
What are the port types and densities on the QFX5100-48S-D-3AFO?
The Juniper QFX5100-48S-D-3AFO provides 48 SFP+/SFP ports for 1/10GbE connectivity and 6 QSFP+ ports for 40GbE uplinks in a 1U form factor.
What is the maximum switching capacity of the QFX5100-48S-D-3AFO?
The QFX5100-48S-D-3AFO delivers up to 1.44Tbps of non-blocking switching capacity with 1.44 Bpps packet forwarding performance.
Which Layer 3 routing protocols does the QFX5100-48S-D-3AFO support?
It supports OSPF, BGP, IS-IS and static routing, enabling fully featured Layer 3 deployments in campus and data center environments.
Does the QFX5100-48S-D-3AFO support advanced virtualization features?
Yes. It provides full VXLAN, EVPN and MPLS support for scalable multi-tenant segmentation and overlay networks.
What operating system runs on the QFX5100-48S-D-3AFO?
It runs Junos OS with a modular, single-image architecture for consistent feature delivery and simplified maintenance.
Can I deploy the QFX5100-48S-D-3AFO in a Virtual Chassis configuration?
Yes. It supports Virtual Chassis to interconnect up to 10 switches under one Junos OS instance for simplified management and scaling.
How does redundant cooling and power improve availability on this switch?
N+1 hot-swap fans and dual DC power supplies eliminate single points of failure, ensuring continuous operation and easy field replacement.
What are the airflow and power supply specifications for the QFX5100-48S-D-3AFO?
It features front-to-back airflow and two hot-swappable 36V DC power supplies to meet diverse data center cooling and power requirements.
How energy-efficient is the QFX5100-48S-D-3AFO?
The switch uses low-power ASICs and variable-speed fans, reducing typical power consumption by up to 50% compared to previous-generation platforms.
Which use cases are best served by the QFX5100-48S-D-3AFO?
It is ideal for spine-and-leaf architectures, top-of-rack deployments and high-performance computing clusters in modern data centers.
How can I manage and monitor the QFX5100-48S-D-3AFO?
Management options include Junos CLI, J-Web GUI, SNMP, NETCONF, REST APIs and integration with Juniper Mist Cloud for real-time analytics.
What security features are available on the QFX5100-48S-D-3AFO?
Built-in security includes MACsec encryption, DHCP snooping, ARP inspection, port security and role-based access control to protect the network edge.
What warranty and support options are offered for this product?
Juniper provides a limited lifetime hardware warranty, with optional Care and Advantage support contracts for 24×7 hardware replacement and software upgrades.
Is the QFX5100-48S-D-3AFO certified for data center standards?
Yes. It holds NEBS Level 3, CE, FCC Class A, RoHS and UL safety certifications for compliance with global data center requirements.
How do I order spare parts or modules for the QFX5100-48S-D-3AFO?
Spare fans, power supplies and transceivers can be ordered through Juniper Authorized Resellers using the SKU or service part numbers listed in the product catalog.
Can the QFX5100-48S-D-3AFO integrate with cloud networking solutions?
Yes. It seamlessly integrates with AWS Direct Connect, Azure ExpressRoute and VMware NSX for secure, high-performance hybrid cloud architectures.