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Magnus Cooke
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Powerful 100G switching. The 32 ports provide massive bandwidth for our core.
QFX5120-32C-DC-AFI
Juniper Networks QFX Series QFX5120-32C - Switch - L3 - mana...
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QFX5120-32C-DC-AFI
- Description:
- Juniper Networks QFX Series QFX5120-32C - Switch - L3 - managed - 32 ports - rack-mountable
- Rating:
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- Brand:
- Juniper
- GTIN:
- 832938097926
- Condition:
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QFX5120-32C-DC-AFI Overview
QFX5120-32C-DC-AFI is a high-performance Layer 2/Layer 3 data center switch built with an advanced architecture to deliver robust performance, efficient stacking, and rapid scalability. It features versatile DC power options, a mix of high-density copper Ethernet ports along with dedicated uplink SFP ports, and engineered stacking capabilities that ensure seamless network expansion without compromising throughput.
QFX5120-32C-DC-AFI is purposefully designed for demanding environments including cloud data centers, virtualized infrastructures, and high-performance computing applications. Its optimized architecture, reliable power design, and low latency performance make it an ideal choice for enterprises and service providers looking for a scalable, managed solution that maximizes network efficiency and flexibility.
QFX5120-32C-DC-AFI price is is available on request. Get immediate quote.
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QFX5120-32C-DC-AFI Specifications
- Product Type
- Switch
- Power Source
- DC
- Layer Supported
- Layer 2 / Layer 3
- Form Factor
- Rack-mount
- Power Consumption
- N/A
- Number of Ethernet Ports
- 24–48 Ports
- Number of Downlink Ports
- 32 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- Media Type Supported
- Combo
- Redundant Power Supply Supported
- No
- Manufacturer Part Number
- QFX5120-32C-DC-AFI
- Uplink Configuration
- 10G
- 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
- 32 copper Ethernet ports; 4 dedicated SFP uplink ports
- Flash Memory
- 256 MB
- Switching Capacity
- 1280 Gbps
- Switching Capacity with Stacking
- 2560 Gbps
- Product Name
- QFX5120-32C-DC-AFI
- Height
- 1.75 inches
- Width
- 17 inches
- Depth
- 15 inches
- Weight
- 15 lbs
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| QFX5120-32C-DC-AFI |  QFX5100-24Q-AA-AFO |  QFX3100-GBE-SFP-ACR |  EX4650-48Y-AFO |  EX4300-48T-AFI | |
|---|---|---|---|---|---|
| Depth | 15 inches | 10.9 inches | N/A | 11 inches | 14.9 inches |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Flash Memory | 256 MB | 256 MB | 64 MB | 64 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 | 1.73 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 | QFX5120-32C-DC-AFI | QFX5100-24Q-AA-AFO | QFX3100-GBE-SFP-ACR | EX4650-48Y-AFO | EX4300-48T-AFI |
| Media Type Supported | Combo | Fiber | Combo | Fiber | Twisted Pair |
| Memory | 4 GB | 4 GB | 256 MB | 256 MB | 512 MB |
| Number of Downlink Ports | 32 Ports | 24 Ports | 24 Ports | 48 Ports | 48 Ports |
| Number of Ethernet Ports | 24–48 Ports | 12–24 Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports |
| POE Support | Non POE | Non POE | Non POE | Non POE | Non POE |
| Port/Expansion Slot Details | 32 copper Ethernet ports; 4 dedicated SFP uplink ports | 24 QSFP+ ports with breakout support to 4x10GbE | N/A | N/A | 48 x 10/100/1000 RJ45 ports and 4 x 1Gb SFP ports |
| Power Consumption | N/A | N/A | N/A | N/A | 95W |
| Power Source | DC | Redundant Power Supply / AC Power Supply | AC Power Supply | Redundant Power Supply / AC Power Supply | AC Power Supply |
| Product Name | QFX5120-32C-DC-AFI | Juniper QFX5100-24Q-AA-AFO | QFX3100-GBE-SFP-ACR | Extreme Networks EX4650-48Y-AFO | EX4300-48T-AFI Ethernet Switch |
| Product Type | Switch | Switch | Switch | Switch | Switch |
| Rack Units | 1 RU | 1 RU | 1 RU | 1 RU | 1 RU |
| Redundant Power Supply Supported | No | Yes | Yes | Yes | No |
| SFP Ports | 4 SFP Ports | 24 SFP Ports | 4 SFP Ports | 24 SFP Ports | 4 SFP Ports |
| Switching Capacity | 1280 Gbps | 1440 Gbps | N/A | 1280 Gbps | 176 Gbps |
| Switching Capacity with Stacking | 2560 Gbps | N/A | N/A | 2560 Gbps | 352 Gbps |
| Uplink Configuration | 10G | 40G | 1G | 10G | 1G |
| Weight | 15 lbs | 20 lbs | N/A | 15 lbs | 18 lbs |
| Width | 17 inches | 17.7 inches | 19 inches | 17.5 inches | 17.3 inches |
Reviews & Ratings
L
Linus Rudd
4
Reliable DC power. Perfect for our telco-grade data center rack deployments.
K
Knox Jones
5
High-capacity Layer 3 switch. Throughput is incredible and the management is intuitive.
J
Jude Brosnahan
4
Top-tier Juniper performance. Solid 100G density for high-speed network backbones.
H
Hugo Tucci
4
Professional and robust. The DC input is stable and the switching fast.
G
Gus Fey
4
Exceptional data center hardware. It handles massive traffic loads with zero bottlenecks.
F
Finn Aduba
5
Consistent and dependable. A high-performance 100G solution for modern enterprise networks.
E
Ezra Davis
5
Excellent build quality. The QFX5120-32C is a powerhouse for high-bandwidth core switching.
Questions & Answers
What is the Juniper Networks QFX5120-32C-DC-AFI switch?
The QFX5120-32C-DC-AFI is a DC-powered, 1U rack-mountable Layer 3 switch with 32 QSFP28/100G ports, designed for high-performance data center and campus deployments.
How many ports and connectors does the QFX5120-32C-DC-AFI offer?
The switch provides 32 QSFP28 ports configurable for 40 GbE or 100 GbE interfaces, supporting breakout to 4×25 GbE or 4×10 GbE links.
What is the switching capacity and throughput of the QFX5120-32C?
It delivers up to 6.4 Tbps of switching capacity and 4.77 Bpps of forwarding throughput to support demanding workloads.
Does the QFX5120-32C-DC-AFI support Layer 3 routing?
Yes, it runs Junos OS with full Layer 3 features, including OSPF, BGP, IS-IS and static routing for enterprise and service-provider networks.
What power supply options are available for this model?
This DC-powered model accepts dual redundant –48 VDC power supplies for high availability and efficient energy use.
Is the QFX5120-32C rack-mountable?
Yes, it comes in a 1-rack-unit form factor with included mounting brackets for standard 19″ racks.
Which operating system does the QFX5120-32C-DC-AFI run?
It runs Juniper’s carrier-class Junos OS, offering consistent CLI, programmability and streamlined operations.
What virtualization and overlay features are supported?
The switch supports EVPN-VXLAN, VLAN, VRF-Lite and MPLS L2VPN, enabling scalable multi-tenant and workload mobility solutions.
What management and automation capabilities does it provide?
It supports Junos Telemetry Interface, NETCONF, REST-CONF, gNMI, Ansible and Python scripting for seamless automation.
Can QFX5120-32C be deployed in a Virtual Chassis configuration?
Yes, it supports Virtual Chassis Fabric, allowing up to 10 switches to operate as a single logical device for simplified management.
What is the typical latency of the QFX5120-32C?
The switch delivers ultra-low, sub-microsecond latency to meet the performance demands of high-speed data center environments.
What are the ideal use cases for the QFX5120-32C-DC-AFI?
It is ideal for spine-leaf fabrics, top-of-rack aggregation, campus distribution and high-density 100 GbE access deployments.
What environmental specifications does the QFX5120-32C-DC-AFI meet?
It operates from 0 °C to 40 °C with front-to-back airflow and meets NEBS Level 3 and ETSI environmental standards.
How can I monitor and troubleshoot the QFX5120-32C?
Embedded analytics, Junos Telemetry Interface and on-box diagnostics provide real-time monitoring, event logging and automated alerts.
What support and warranty options are available?
Juniper offers a limited lifetime hardware warranty, J-Care support packages and optional Proactive Care for rapid incident resolution.
How does the QFX5120-32C optimize power efficiency?
It features compact ASICs, efficient DC-DC conversion and dynamic port power management to minimize energy consumption.