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Hugh Telford
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DC powered QSFP+ switch delivered excellent stability.
QFX5100-24Q-D-3AFI
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QFX5100, 24 QSFP+ ports, 2 expansion slots, redundant fans,...
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QFX5100-24Q-D-3AFI
- Description:
- QFX5100, 24 QSFP+ ports, 2 expansion slots, redundant fans, 2 DC power supplies, back to front airflow
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- Brand:
- Juniper
- GTIN:
- 658759179333
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- List Price:
$1,586.00
- Price:
$1,346.0015.1% off
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1
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QFX5100-24Q-D-3AFI Overview
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.
QFX5100-24Q-D-3AFI price is is available on request. Get immediate quote.
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QFX5100-24Q-D-3AFI Specifications
- Product Type
- Switch
- Brand
- Juniper
- Power Source
- Redundant Power Supply
- Layer Supported
- Layer 2 / Layer 3
- Form Factor
- Rack-mount
- Number of Ethernet Ports
- 24–48 Ports
- Number of Downlink Ports
- 24 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- Media Type Supported
- Fiber
- Redundant Power Supply Supported
- Yes
- Manufacturer Part Number
- QFX5100-24Q-D-3AFI
- Uplink Configuration
- 40G
- 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
- 24 QSFP+ ports for data center connectivity and 4 SFP ports for management
- Flash Memory
- 256 MB
- Switching Capacity
- 1920 Gbps
- Switching Capacity with Stacking
- 3840 Gbps
- Product Name
- Juniper QFX5100-24Q-D-3AFI Data Center Switch
- Height
- 1.75 inches
- Width
- 17.5 inches
- Depth
- 16.5 inches
- Weight
- 15 lbs
QFX5100-24Q-D-3AFI Use Case
High-Performance Spine Deployment in Hyperscale Data Centers
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.
Ultra-Low-Latency Infrastructure for Financial Trading
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.
Carrier-Grade Core Switch for Telecom Aggregation
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.
Quality Certifications
Product Comparison Table 
| 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 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 |
| 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 |
| 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 |
Reviews & Ratings
C
Callum Renshaw
5
Airflow-in design reduced thermal concerns.
L
Lucian Foster
5
Strong option for modern fabrics.
B
Basil Kent
5
Predictable performance under load.
O
Orson Whitaker
5
Reliable data center switch.
Questions & Answers
What is the Juniper QFX5100-24Q-D-3AFI 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.
How many ports and what speeds does the QFX5100-24Q-D-3AFI support?
The switch provides 24 QSFP+ ports that support 40GbE natively and can break out to four 10GbE interfaces per port using compatible breakout cables.
Which expansion modules are compatible with the QFX5100-24Q-D-3AFI?
It supports two mid-plane expansion slots for 100GbE or 40GbE modules, including QFX10000 line cards and CFP2 optical transceivers.
How does the redundant fan architecture improve reliability?
Redundant field-replaceable fans ensure continuous airflow and component cooling, minimizing downtime during maintenance or individual fan failure.
What type of power supplies does the QFX5100-24Q-D-3AFI use?
It ships with two hot-swappable 750W DC power supply modules that provide N+1 redundancy and support –48V DC input.
What is the airflow direction, and why does it matter?
This model uses back-to-front airflow to align with data center cold-aisle/hot-aisle containment and optimize cooling efficiency.
What is the switching capacity and forwarding rate?
The QFX5100-24Q-D-3AFI delivers up to 3.2Tbps of switching capacity and 1.44 Bpps (billion packets per second) of line-rate forwarding.
Does the QFX5100-24Q-D-3AFI support Virtual Chassis or MLAG?
Yes, it supports Virtual Chassis technology for multi-chassis management and active-active MLAG for high-availability and load-balancing.
Which Junos OS features are supported on this switch?
It runs Junos OS with support for VXLAN/EVPN, MPLS, EVPN-VXLAN, IPv4/IPv6, telemetry, and full automation via PyEZ and Ansible modules.
What are common use cases for the QFX5100-24Q-D-3AFI?
Typical use cases include top-of-rack spine/leaf deployments, high-performance computing clusters, storage fabrics, and campus core aggregation.
How can I automate management of the QFX5100-24Q-D-3AFI?
You can automate configuration using Junos PyEZ, native Ansible modules, REST APIs, and monitoring with SNMP or Junos Telemetry Interface (JTI).
What is the typical port-to-port latency?
The switch delivers sub-microsecond latency at line rate, typically less than 600 ns across all 40GbE ports.
What environmental specifications should I consider?
Operating temperature ranges from 0 °C to 40 °C, with a maximum power draw of 750W per supply and compliance with NEBS Level 3 and RoHS.
How do I integrate the QFX5100-24Q-D-3AFI into an existing network?
Integrate it by leveraging MLAG or Virtual Chassis for seamless stacking, enable EVPN-VXLAN for overlay, and connect to spine switches via 40/100GbE uplinks.
What warranty and support options are available?
Juniper offers a one-year limited hardware warranty with next-business-day advance replacement and optional Juniper Care or Juniper Care Plus support contracts.