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DC powered QSFP+ switch delivered excellent stability.
QFX5100-24Q-D-3AFI
QFX5100, 24 QSFP+ ports, 2 expansion slots, redundant fans,...
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QFX5100-24Q-D-3AFI
QFX5100, 24 QSFP+ ports, 2 expansion slots, redundant fans,...
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QFX5100-24Q-D-3AFI is a high-performance data center switch engineered with a robust, scalable architecture that supports both Layer 2 and Layer 3 operations. Designed for demanding network environments, it provides advanced connectivity options with a mix of 24 high-speed QSFP+ ports for data center interconnects and 4 dedicated SFP ports for management, enabling efficient stacking and operational scalability.
QFX5100-24Q-D-3AFI offers redundant power supply options and versatile port configurations that deliver reliable performance in mission-critical applications. Its cutting-edge switching capacity and seamless integration into existing infrastructures make it ideal for enterprise data centers, high-density campus networks, and cloud environments where consistent, high-speed connectivity is essential.
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In a cloud service provider’s hyperscale data center, the QFX5100-24Q-D with 24 QSFP+ ports, two expansion slots, redundant fans, dual DC power supplies, and back-to-front airflow serves as the spine switch. It delivers up to 1.2 Tbps of low-latency switching and supports EVPN-VXLAN for seamless multi-tenant segmentation. The result is consistent sub-microsecond latency, 99.999% uptime through component redundancy, and simplified operations at massive scale.
At a major financial exchange, the QFX5100-24Q-D chassis with 24 QSFP+ ports and two expansion slots creates an ultra-low-latency fabric for high-frequency trading. Redundant fans and dual DC power supplies ensure continuous operation, while back-to-front airflow integrates with hot-aisle containment. Traders benefit from sub-200 ns port-to-port latency, maximum link utilization, and risk-mitigated outages, enabling competitive edge in millisecond markets.
A Tier-1 telecom provider deploys the QFX5100-24Q-D as its core aggregation switch, leveraging 24 QSFP+ ports for multi-gigabit links, two expansion slots for service modules, and redundant fans plus dual DC power for uninterrupted service. Back-to-front airflow aligns with data center cooling. This configuration delivers 1.2 Tbps capacity, Enhanced OSPF/IS-IS convergence, and 5 9s availability—optimizing bandwidth utilization and supporting rapid service turn-up.
To get the detailed certification, please go to the Compliance Center.
 QFX5100-24Q-D-3AFI |  QFX5100-48S-D-3AFI |  QFX5100-48S-DC-AFO |  QFX5100-24Q-AA-AFO |  QFX5100-48T-AFO | |
|---|---|---|---|---|---|
| Depth | 16.5 inches | 17.5 inches | 18 inches | 10.9 inches | 17.5 inches |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Flash Memory | 256 MB | 256 MB | 256 MB | 256 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 | 1.75 inches | 1.75 inches |
| IOS | IP Services | IP Services | IP Services | IP Services | IP Services |
| 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 3 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | QFX5100-24Q-D-3AFI | QFX5100-48S-D-3AFI | QFX5100-48S-DC-AFO | QFX5100-24Q-AA-AFO | QFX5100-48T-AFO |
| Media Type Supported | Fiber | Fiber | Fiber | Fiber | Twisted Pair |
| Memory | 4 GB | 4 GB | 4 GB | 4 GB | 4 GB |
| Number of Downlink Ports | 24 Ports | 48 Ports | 48 Ports | 24 Ports | N/A |
| 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 | 24 QSFP+ ports for data center connectivity and 4 SFP ports for management | N/A | N/A | 24 QSFP+ ports with breakout support to 4x10GbE | 48x 10/100/1000BASE-T ports; 2x 10GbE SFP+ uplink ports |
| Power Consumption | N/A | 330W | N/A | N/A | N/A |
| Power Source | Redundant Power Supply | Redundant Power Supply / AC Power Supply | AC Power Supply | Redundant Power Supply / AC Power Supply | AC Power Supply |
| Product Name | Juniper QFX5100-24Q-D-3AFI Data Center Switch | Juniper Networks QFX5100-48S-D-3AFI | Juniper QFX5100-48S-DC-AFO | Juniper QFX5100-24Q-AA-AFO | Juniper QFX5100-48T-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 | No | Yes | No |
| SFP Ports | 4 SFP Ports | 48 SFP Ports | 48 SFP Ports | 24 SFP Ports | 2 SFP+ Ports |
| Switching Capacity | 1920 Gbps | 1280 Gbps | 1280 Gbps | 1440 Gbps | 720 Gbps |
| Switching Capacity with Stacking | 3840 Gbps | 2560 Gbps | 1280 Gbps | N/A | 1.44 Tbps |
| Uplink Configuration | 40G | 10G | 10G | 40G | 10G |
| Weight | 15 lbs | 18 lbs | 15 lbs | 20 lbs | 12 lbs |
| Width | 17.5 inches | 19 inches | 17.5 inches | 17.7 inches | 17.5 inches |
DC powered QSFP+ switch delivered excellent stability.
Airflow-in design reduced thermal concerns.
Strong option for modern fabrics.
Predictable performance under load.
Reliable data center switch.
The Juniper QFX5100-24Q-D-3AFI is a high-performance data center switch offering 24 QSFP+ 40GbE ports, two expansion slots, redundant fans, dual DC power supplies, and back-to-front airflow.
The switch provides 24 QSFP+ ports that support 40GbE natively and can break out to four 10GbE interfaces per port using compatible breakout cables.
It supports two mid-plane expansion slots for 100GbE or 40GbE modules, including QFX10000 line cards and CFP2 optical transceivers.
Redundant field-replaceable fans ensure continuous airflow and component cooling, minimizing downtime during maintenance or individual fan failure.