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QFX5100-48S-3AFI
QFX5100, 48 SFP+/SFP ports, 6 QSFP+ ports, redundant fans, 2...
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QFX5100-48S-3AFI is engineered with a robust architecture designed for high-density data center environments, featuring a fixed rack-mount form factor that supports both redundant and AC power supply options. The switch offers 48 SFP ports for diverse fiber connectivity and delivers high performance with low latency, making it ideal for critical network roles where stacking and scalability are essential.
The design of QFX5100-48S-3AFI emphasizes reliability and advanced network capabilities, supporting both Layer 2 and Layer 3 operations with a future-proof switching capacity. Its architecture ensures seamless expansion, exceptional throughput, and efficient power management, making it a strong fit for cloud data centers, enterprise aggregation, and high-speed server clusters.
QFX5100-48S-3AFI price is is available on request. Get immediate quote.
Request bulk order quote for QFX5100-48S-3AFI for additional pricing. Browse the full Juniper Qfx5100 Series Switches series or explore all Juniper products.
In a 2,000-server enterprise data center, deploy the QFX5100-48S-3AFI-QFX5100 as a leaf switch with 48 SFP+/SFP server ports and 6 QSFP+ uplinks to spine routers. Redundant fans, dual AC power supplies and back-to-front airflow guarantee 24/7 operation in high-density racks. Outcome: non-blocking 10/40 GbE fabric delivers sub-microsecond latency, simplifies scaling and boosts VM east-west throughput by 35%.
In a telecom central office, use the QFX5100-48S-3AFI-QFX5100 to aggregate 48 SFP+/SFP fronthaul links from remote radio units and provide 6 QSFP+ 40 GbE uplinks to the core. Front-to-back airflow aligns with standard telco racks, while redundant fans and dual AC power maximize uptime. Outcome: consistent sub-100 µs latency, carrier-grade reliability and 50% reduction in cooling footprint.
Connect 48 GPU compute nodes via SFP+ and aggregate to a 6-node spine fabric over QSFP+ using the QFX5100-48S-3AFI-QFX5100. Back-to-front airflow and N+1 fans keep temperature under control in GPU-dense racks, while dual AC power ensures zero interruption. Outcome: scalable 10/40 GbE interconnect lowers cluster jitter by 40%, accelerating model training times by 25%.
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| QFX5100-48S-3AFI |  QFX5100-48S-3AFO |  QFX5100-24Q-3AFO |  QFX5100-48S-D-3AFO |  QFX5100-96S-AFI | |
|---|---|---|---|---|---|
| Depth | 18 inches | 18 inches | 17 inches | 18 inches | 18 inches |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10G |
| Flash Memory | 256 MB | 256 MB | 256 MB | 64 MB | 256 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.7 inches | 1.75 inches | 1.73 inches | 1.75 inches | 1.75 inches |
| Interface Ports | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10G |
| Layer Supported | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | QFX5100-48S-3AFI | QFX5100-48S-3AFO | QFX5100-24Q-3AFO | QFX5100-48S-D-3AFO | QFX5100-96S-AFI |
| Media Type Supported | Fiber | Fiber | Fiber | Fiber | Fiber |
| Memory | 4 GB | 512 MB | 4 GB | 256 MB | 4 GB |
| Number of Ethernet Ports | 24–48 Ports | 24–48 Ports | 12–24 Ports | 24–48 Ports | Over 48 Ports |
| POE Support | Non POE | Non POE | Non POE | Non POE | Non POE |
| Power Source | Redundant Power Supply / AC Power Supply | Redundant Power Supply / AC Power Supply | AC Power Supply | Redundant Power Supply / AC Power Supply | Redundant Power Supply / AC Power Supply |
| Product Name | Juniper QFX5100-48S-3AFI | Juniper QFX5100-48S-3AFO Switch | Juniper QFX5100-24Q-3AFO | Juniper QFX5100-48S-D-3AFO | Juniper QFX5100-96S-AFI |
| 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 | Yes | Yes |
| Switching Capacity | 1280 Gbps | 1280 Gbps | 1440 Gbps | 1280 Gbps | 2560 Gbps |
| Uplink Configuration | 40G | 40G | 40G | 10G | 10G |
| Weight | 15 lbs | 14 lbs | 8 lbs | 20 lbs | 30 lbs |
| Width | 17.5 inches | 19 inches | 17.5 inches | 17.5 inches | 17.5 inches |
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
High density SFP+ ports with excellent reliability.
Consistent performance in leaf deployments.
Airflow-in suited our racks well.
Stable under heavy traffic.
Good value for capacity.
The Juniper QFX5100-48S-3AFI is a high-performance data center switch offering 48 SFP+/SFP ports, 6 QSFP+ ports, redundant fans, dual AC power supplies and back-to-front airflow for scalable leaf-spine deployments.
It supports 48 full-duplex SFP+/SFP ports at up to 10 GbE and 6 QSFP+ ports at up to 40 GbE, enabling flexible uplinks or spine connections in modern data centers.
Designed for low latency and high throughput, it delivers up to 1.44 Tbps switching capacity and sub-650 ns port-to-port latency for demanding virtualization and cloud workloads.
Its leaf-spine optimized design, rich port density and Junos OS integration make it ideal for large-scale cloud, virtualization, and software-defined network fabrics.
It includes two hot-swappable AC power supplies and redundant front-to-back fans to maintain uninterrupted operation and prevent single points of failure.
This model uses back-to-front airflow, aligning with standard data-center cooling aisles and simplifying rack integration for hot-aisle/cold-aisle containment.
It runs Juniper’s Junos OS, offering a single consolidated CLI, automation via Python and REST APIs, and full integration with Juniper Networks Contrail and Junos Space.
Junos OS comes standard with Layer 2/3, MPLS, EVPN/ VXLAN and full IPv4/IPv6 support. Optional feature licenses include advanced QFabric, virtual chassis, and MACsec encryption.
Yes, it supports Virtual Chassis technology, enabling up to 10 units to operate as a single logical switch for simplified management and increased port density.
It delivers MACsec encryption, dynamic ACLs, storm control, DHCP snooping and robust DoS/ DDoS protection to secure east-west and north-south traffic.
Connect SFP+/SFP access ports to servers and QSFP+ spine ports to aggregation switches. Enable EVPN-VXLAN or MLAG for seamless east-west scaling and redundancy.
Typical power draw is 320 W under full load, with a maximum of 600 W including both power supplies, making it energy-efficient for 10/40 GbE operations.
It features redundant power, fans and in-service software upgrades (ISSU) in dual-rack-unit clusters to minimize maintenance windows and prevent downtime.
Use Junos CLI, SNMP, Juniper Network Director and Telemetry integrations for real-time analytics, automated alerts and deep packet buffering during fault isolation.
Juniper provides a one-year limited warranty, with optional Juniper Care support for 24×7 technical assistance, hardware replacement and software updates.
You can order through Juniper’s global network of authorized resellers, distribution partners or directly via Juniper’s e-commerce portal for fast delivery.
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