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Stable back to front airflow with consistent QSFP performance.
QFX5100-24Q-3AFI
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QFX5100, 24 QSFP+ ports, 2 expansion slots, redundant fans,...
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QFX5100-24Q-3AFI
- Description:
- QFX5100, 24 QSFP+ ports, 2 expansion slots, redundant fans, 2 AC power supplies, back to front airflow
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- Brand:
- Juniper
- GTIN:
- 662618892158
- Condition:
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QFX5100-24Q-3AFI Overview
QFX5100-24Q-3AFI is a high-performance data center switch built with a non-blocking, modular architecture that supports both Layer 2 and Layer 3 operations. Its fixed rack-mount form factor combines innovative power options with robust internal AC power supplies and redundant power support while offering 24 high-speed QSFP28 ports designed for flexible 40G/100G uplink configurations.
Engineered for scalability and low-latency performance in modern networks, this switch supports stacking capabilities for seamless network expansion and integration without service interruption. Ideal for top-of-rack deployments and high-demand use cases, the QFX5100-24Q-3AFI delivers reliable performance in data centers while running on Junos OS for advanced routing and management functions.
QFX5100-24Q-3AFI price is is available on request. Get immediate quote.
Request bulk order quote for QFX5100-24Q-3AFI for additional pricing. Browse the full Juniper Qfx5100 Series Switches series or explore all Juniper products.
QFX5100-24Q-3AFI Specifications
- Product Type
- Switch
- Power Source
- AC Power Supply
- Layer Supported
- Layer 2 / Layer 3
- Form Factor
- Rack-mount
- Power Consumption
- N/A
- Number of Ethernet Ports
- 12–24 Ports
- Number of Downlink Ports
- 24 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/25/40/100GbE
- Media Type Supported
- Fiber / Copper
- Redundant Power Supply Supported
- Yes
- Manufacturer Part Number
- QFX5100-24Q-3AFI
- Uplink Configuration
- 40G/100G
- IOS
- Junos OS
- POE Support
- Non POE
- SFP Ports
- N/A
- Memory
- 4 GB
- Rack Units
- 1 RU
- Interface Ports
- 10/25/40/100GbE
- Port/Expansion Slot Details
- 24 QSFP28 fixed ports
- Flash Memory
- 256 MB
- Switching Capacity
- 4800 Gbps
- Switching Capacity with Stacking
- N/A
- Product Name
- Juniper Networks QFX5100-24Q-3AFI
- Height
- 1.75 inches
- Width
- 17.5 inches
- Depth
- 18.5 inches
- Weight
- 25 lbs
QFX5100-24Q-3AFI Use Case
Spine-Leaf Data Center Interconnect for Hyperscale Cloud
In a hyperscale enterprise cloud environment, the QFX5100-24Q-3AFI serves as a spine switch in a leaf-spine topology, aggregating 48 leaf switches over 24 QSFP+ 40 GbE ports and offering two 100 GbE uplinks via expansion slots. Redundant fans and dual AC power supplies ensure five-9s availability, while back-to-front airflow aligns with hot-aisle/cold-aisle practices. Outcome: sub-2 µs latency, linear scaling to 10 K+ servers, and carrier-grade uptime for mission-critical applications.
Ultra-Low-Latency Fabric for High-Frequency Trading
At a financial exchange colocation, trading firms deploy the QFX5100-24Q-3AFI as an aggregation switch to connect trading servers and market data feeds. With wire-speed 40 GbE switching on 24 QSFP+ ports, two 100 GbE expansion uplinks, and hardware-accelerated forwarding, firms achieve deterministic sub-microsecond latency. Redundant fans and power supplies guarantee continuous operation, and back-to-front airflow matches exchange rack standards. Outcome: maximum order throughput, minimized slippage, and uncompromised trading resilience.
5G Mobile Edge Aggregation for Service Providers
A tier-1 telecom operator uses the QFX5100-24Q-3AFI at its 5G mobile edge to aggregate cell-site traffic. The switch’s 24 QSFP+ ports provide 40 GbE backhaul to macro and small cells, while two 100 GbE expansion slots connect to the regional core. Redundant cooling and power modules deliver SLA-driven reliability, and back-to-front airflow integrates seamlessly into edge racks. Outcome: scalable high-bandwidth aggregation, simplified network growth, and 99.99% service availability for latency-sensitive 5G workloads.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| QFX5100-24Q-3AFI |  QFX5100-96S-DC-AFO |  QFX5100-48S-DC-AFI |  QFX5100-48S-D-3AFI |  QFX5100-24Q-AA-AFI | |
|---|---|---|---|---|---|
| Depth | 18.5 inches | 10 inches | 10.7 inches | 17.5 inches | 17 inches |
| Ethernet Technology | 10/25/40/100GbE | 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 | 1.72 inches | 1.75 inches | 1.75 inches |
| IOS | Junos OS | IP Services | IP Services | IP Services | IP Services |
| Interface Ports | 10/25/40/100GbE | 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-3AFI | QFX5100-96S-DC-AFO | QFX5100-48S-DC-AFI | QFX5100-48S-D-3AFI | QFX5100-24Q-AA-AFI |
| Media Type Supported | Fiber / Copper | Fiber | Fiber | Fiber | Fiber |
| Memory | 4 GB | 4 GB | 512 MB | 4 GB | 4 GB |
| Number of Downlink Ports | 24 Ports | N/A | 48 Ports | 48 Ports | 24 Ports |
| Number of Ethernet Ports | 12–24 Ports | Over 48 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 | 24 QSFP28 fixed ports | 96x 10GbE SFP+ ports | N/A | N/A | 24 x 40GbE QSFP ports, 4 x 10GbE SFP+ ports |
| Power Consumption | N/A | N/A | 300W | 330W | 250 W |
| Power Source | AC Power Supply | DC Power Supply | DC Power Supply | Redundant Power Supply / AC Power Supply | Redundant Power Supply / AC Power Supply |
| Product Name | Juniper Networks QFX5100-24Q-3AFI | Juniper QFX5100-96S-DC-AFO Data Center Ethernet Switch | Juniper Networks QFX5100-48S-DC-AFI Datacenter Switch | Juniper Networks QFX5100-48S-D-3AFI | Juniper QFX5100-24Q-AA-AFI 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 | No | No | Yes | Yes |
| SFP Ports | N/A | 96 SFP Ports | 48 SFP Ports | 48 SFP Ports | 4 SFP Ports |
| Switching Capacity | 4800 Gbps | 1280 Gbps | 1280 Gbps | 1280 Gbps | 1280 Gbps |
| Switching Capacity with Stacking | N/A | 2560 Gbps | N/A | 2560 Gbps | N/A |
| Uplink Configuration | 40G/100G | 40G | 40G | 10G | 40G |
| Weight | 25 lbs | 16 lbs | 21 lbs | 18 lbs | 15 lbs |
| Width | 17.5 inches | 17.5 inches | 17.17 inches | 19 inches | 19 inches |
Reviews & Ratings
A
Alistair Boone
4
Works reliably as a spine switch.
G
Gerald Hopkins
5
Low latency and predictable behavior.
S
Simon Rowland
5
Meets enterprise fabric requirements.
T
Trevor Blake
4
Good value for high speed switching.
Questions & Answers
What is the port configuration of the QFX5100-24Q-3AFI?
The QFX5100-24Q-3AFI features 24 QSFP+ ports supporting native 40 GbE or breakout to up to 96×10 GbE, plus two expansion slots for additional modules.
Which data-center speeds does the QFX5100-24Q-3AFI support?
It delivers line-rate 40 GbE per QSFP+ port, breakout to 4×10 GbE, and supports 1 GbE with appropriate transceivers.
How many expansion slots are available on this switch?
The switch includes two hot-swappable expansion slots for optional QFX5100 uplink and fabric modules.
What redundancy features are built into the QFX5100-24Q-3AFI?
It offers dual hot-swappable AC power supplies and redundant front-to-back fans for uninterrupted operation.
How is airflow managed in the QFX5100-24Q-3AFI?
The appliance uses a front-to-back airflow design to align with standard data-center cooling practices.
What are the power supply specifications?
It includes two 100–240 VAC, 50/60 Hz, 1600 W hot-swappable power supplies supporting N+1 redundancy.
What is the switching capacity and forwarding rate?
The switch delivers up to 1.44 Tbps of switching capacity and supports 1080 Mpps of L2/L3 forwarding.
Which Junos OS features does it support?
It runs Junos OS with EVPN, VXLAN, MLAG, QoS, IPv4/IPv6 routing, BGP, OSPF, and advanced security features.
Can the QFX5100-24Q-3AFI be deployed in a Virtual Chassis configuration?
Yes, it supports Virtual Chassis Fabric, enabling up to 10 switches to operate as a single logical device.
How does it support EVPN and VXLAN?
It offers hardware-based VXLAN encapsulation and EVPN control-plane for scalable, multi-tenant overlays.
What is the latency performance of the switch?
It delivers sub-microsecond latency at approximately 720 ns for cut-through traffic.
Which monitoring and management tools are available?
You can manage via Junos CLI, Junos Space, NETCONF, SNMP, sFlow, and the built-in out-of-band management port.
What power-efficiency features are included?
The switch employs cut-through architecture, dynamic power scaling per port and energy-efficient components.
What warranty and support options are provided?
It includes a one-year limited hardware warranty and optional Juniper Care support for expedited RMA and software upgrades.
How can the QFX5100-24Q-3AFI be deployed in a spine-leaf topology?
Use it as a spine or leaf switch in an EVPN-VXLAN fabric to achieve non-blocking, high-performance interconnects.
What consoles and remote-management interfaces are offered?
It provides an RJ-45 console port, USB console port and a dedicated out-of-band 1 GbE management interface.
How does the switch handle firmware upgrades?
It supports Junos Nonstop Software Upgrade (NSSU) and NSR for non-disruptive, in-service software updates.