The Juniper QFX3600-16Q is a high-performance 40 Gigabit Ethernet data center switch designed for top-of-rack, aggregation, and leaf-spine deployments. Built by Juniper Networks, this compact 1RU switch delivers ultra-low latency, high switching capacity, and flexible port configurations for modern data center infrastructures.
Equipped with 16 native 40GbE QSFP+ ports, the QFX3600-16Q provides high-bandwidth connectivity for server clusters, storage systems, and aggregation switches. Each QSFP+ interface can also be configured using breakout cables to support 4×10GbE connections, enabling up to 64 × 10GbE ports for high-density server connectivity.
Designed with a cut-through switching architecture, the switch delivers wire-rate throughput with latency under one microsecond (approximately 650 ns). This makes the platform ideal for latency-sensitive environments such as high-frequency trading, big data analytics platforms, and high-performance computing (HPC) clusters.
The QFX3600-16Q can operate as a standalone Ethernet switch, as a member of a Virtual Chassis, or as a node within the Juniper QFabric architecture. These flexible deployment options allow organizations to scale their network infrastructure while simplifying management and maintaining consistent performance across the data center fabric.
Powered by Junos OS, the switch supports advanced Layer 2 and Layer 3 networking capabilities, including routing protocols such as BGP and OSPF, as well as VXLAN Layer-2 gateway functionality for modern virtualized data center environments.
The platform is built for reliability with dual redundant hot-swappable AC or DC power supplies and three hot-swappable fan modules, ensuring continuous operation and high availability in mission-critical deployments.
With its high-density 40GbE connectivity, breakout flexibility, and ultra-low latency performance, the Juniper QFX3600-16Q provides a powerful switching solution for data center fabrics, HPC environments, financial trading networks, and large-scale enterprise infrastructures.
Product Specifications – Juniper QFX3600-16Q 40GbE Data Center Switch
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| Specification |
Details |
| Manufacturer |
Juniper Networks |
| Product Name |
Juniper QFX3600-16Q |
| Product Type |
Data Center Ethernet Switch |
| Product Series |
Juniper QFX3600 Series |
| Part Number |
QFX3600-16Q |
| Form Factor |
1RU rack-mount |
| Port Density |
16 × 40GbE QSFP+ ports |
| Maximum 10GbE Density |
Up to 64 × 10GbE ports via breakout cables |
| Switching Capacity |
1.28 Tbps |
| Forwarding Rate |
960 million packets per second (Mpps) |
| Latency |
Less than 1 microsecond (650 ns typical) |
| Architecture |
Cut-through switching architecture |
| Operating System |
Junos OS |
| Stacking Technology |
Virtual Chassis |
| QFabric Support |
Operates as a QFabric Node |
| Layer Support |
Layer 2 and Layer 3 switching |
| Routing Protocols |
BGP, OSPF |
| Network Virtualization |
VXLAN L2 Gateway support |
| Quality of Service |
Advanced QoS with hardware traffic prioritization |
| Security Features |
ACLs, port security, Junos security features |
| Power Supplies |
2 × redundant hot-swappable AC or DC power supplies |
| Cooling |
3 × redundant hot-swappable fan modules |
| Airflow |
Front-to-back or back-to-front depending on model |
| High Availability |
Redundant power and cooling |
| Deployment |
Data center top-of-rack, aggregation, leaf-spine |
| Typical Use Cases |
High-frequency trading, HPC clusters, big data analytics, cloud data centers |
FAQs:
Q1. Can this switch support 100GbE?
No. The QFX3600-16Q is strictly a 40GbE/10GbE platform. For native 100GbE support, you would need to look at newer models like the QFX5120 or QFX5200 series.
Q2. Does this switch support both front-to-back and back-to-front airflow?
Yes. Like many QFX series switches, it is available in AFO (Airflow Out/Front-to-Back) and AFI (Airflow In/Back-to-Front) configurations. You must match the fan and power supply modules to the desired airflow.
Q3. How many 10GbE ports can I get out of this switch?
By using QSFP+ to 4xSFP+ breakout cables on all 16 ports, the switch can support a maximum of 64 x 10GbE ports.
Q4. Is the QFX3600-16Q still used in QFabric?
While the QFabric architecture has largely been succeeded by EVPN-VXLAN fabrics, the QFX3600 remains a robust standalone or Virtual Chassis switch for 10G/40G environments.
Q5. What is the power consumption of this switch?
Typical power consumption is approximately 345W, though this varies based on the type of optics (SR4 vs. LR4) and traffic load.
