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Delivering reliable IT hardware solutions since 2009.
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Part Number: QFX5110-48S-AFI2
Description: 48 SFP+ and 4 QSFP28, back to front air flow, AC
Category: Juniper QFX5100 Series Switches, Juniper Switches, Switches
and more
15+ Years of Proven Excellence
Delivering reliable IT hardware solutions since 2009.
Same-Day Shipping
On all on-hand orders placed before 2 pm CST.
Limited Lifetime Warranty
You’ll find warranty coverage on the majority of our hardware.*
Terms & Conditions*
The Juniper QFX5110-48S-AFI2 is a high-performance Ethernet switch designed to address the demands of evolving data centers that are rapidly adopting cloud services. As organizations embrace hybrid models combining on-premise private clouds with off-premise cloud services, the QFX5110-48S-AFI2 provides the flexible, reliable foundation needed for dynamic data centers.
The QFX5110-48S-AFI2 delivers wire-speed packet performance with very low latency, making it ideal for mission-critical applications in today’s demanding data center environments. Powered by a 1.8 GHz quad-core Intel CPU, this highly agile switching platform provides the processing power necessary to handle complex network functions while maintaining consistent throughput. The QFX5110-48S provides server access speeds that scale with increasing demand from applications and services.
With its high-throughput packet forwarding engine, the QFX5110-48S-AFI2 efficiently manages the east-west traffic patterns typical in spine and leaf topologies. This performance optimization ensures that data center networks can support the tremendous growth in server-to-server communication driven by application architectures and server virtualization. The switch’s architecture minimizes latency, a critical enabler for latency-sensitive applications in modern data centers.
The QFX5110-48S-AFI2 offers robust support for network virtualization and overlay technologies essential for cloud and SDN adoption. It provides hardware VXLAN (Virtual Extensible LAN) capabilities, making it an excellent choice for VXLAN overlay deployments in data center networks transitioning to more flexible architectures. This support enables smooth integration in environments utilizing bare metal servers alongside virtualized infrastructure.
As organizations continue the widespread adoption of both on-premise and completely off-premise models for cloud services, the QFX5110-48S-AFI2 provides the network foundation needed to support these hybrid environments. Its advanced capabilities enable seamless connectivity between traditional and virtualized workloads, supporting the transition to more dynamic, software-defined infrastructure.
The QFX5110-48S-AFI2 is designed to excel in spine and leaf deployments, providing consistent performance across various data center network topologies. Its optical fiber Ethernet technology delivers reliable, high-bandwidth connectivity for both server access and data center interconnect applications. This flexibility makes it suitable for deployments of varying scales, from small enterprise data centers to large-scale cloud environments.
With support for leading routing protocols and rich Layer 2/Layer 3 functionality, the QFX5110-48S-AFI2 can be deployed in multiple roles within the data center network. Whether used as a top-of-rack switch in server access applications or as part of a spine layer for aggregation, the QFX5110 switches deliver consistent performance and functionality across the data center fabric.
The QFX5110-48S-AFI2 runs on Junos OS, Juniper Networks’ robust network operating system that provides consistent implementation across the entire Juniper infrastructure. This operational consistency extends from QFX and EX Series Ethernet switches to Juniper Networks routers, simplifying management and troubleshooting across the network.
Junos OS on the QFX5110-48S-AFI2 provides advanced control plane features that enhance security and reliability. With support for automation and programmability, Junos OS enables rapid deployment of network changes and facilitates integration with orchestration systems. This operational efficiency is crucial for extremely agile data centers that must adapt quickly to changing business requirements.
The Juniper QFX5110-48S-AFI2 offers comprehensive technical specifications designed to meet the demanding requirements of modern data center environments.
| Feature | Specification |
| Form Factor | 1U rackmount |
| Dimensions (W x H x D) | 17.36 x 1.72 x 20.48 inches (44.09 x 4.37 x 52.02 cm) |
| Weight | 23.5 lb (10.66 kg) |
| Switching Capacity | 1.76 Tbps |
| Forwarding Rate | 1,309 Mpps |
| Ports | 48 x 10GbE/25GbE SFP28 ports + 8 x 40GbE/100GbE QSFP28 ports |
| CPU | 1.8 GHz quad-core Intel CPU |
| System Memory | 16 GB |
| SSD Storage | 64 GB |
| Power Supply | 2 x 650W AC power supplies (1+1 redundant) |
| Airflow | Front-to-back (AFI2) |
| Mean Time Between Failures | > 200,000 hours |
The AFI2 in QFX5110-48S-AFI2 denotes the front-to-back airflow configuration, optimized for typical data center deployments where cool air flows from the front (cold aisle) to the back (hot aisle).
The QFX5110-48S-AFI2 supports a comprehensive suite of networking protocols:
The QFX5110-48S supports virtualization protocols critical for modern cloud-centric architectures, enabling flexible network design that adapts to changing application requirements.
The QFX5110-48S-AFI2 delivers exceptional performance metrics essential for data center networks:
With its advanced architecture, the QFX5110-48S-AFI2 provides the performance necessary for data center applications requiring consistent low latency and high throughput, from financial services to media streaming and virtualization.
Running on Junos OS, the QFX5110-48S-AFI2 provides rich software functionality:
These software capabilities enable the QFX5110-48S-AFI2 to integrate seamlessly with modern data center orchestration systems while providing the operational tools needed for efficient network management.
The QFX5110-48S-AFI2 provides an ideal migration path for data centers evolving from 10G to 25G server connectivity. Its 48 SFP28 ports support both 10G and 25G speeds without requiring hardware changes—simply upgrade transceivers as needed. This flexibility allows for phased deployments where you can upgrade critical servers to 25G while maintaining 10G connectivity for less demanding workloads. The eight 100G QSFP28 uplink ports similarly support both 40G and 100G, giving you uplink headroom as your access speeds increase. Organizations typically implement this approach by upgrading one rack at a time, minimizing disruption while gradually enhancing performance. Most customers report achieving 2.5x throughput improvements with minimal changes to their physical infrastructure, cabling, or operational procedures.
The QFX5110-48S-AFI2 excels in mixed environments through its comprehensive support for both traditional and overlay networking. For virtualization, it offers native VXLAN capabilities with EVPN control plane, providing seamless connectivity across hypervisors without performance penalties. Container environments benefit from the switch’s low latency (under 1 microsecond) and advanced traffic management features that maintain performance even during microbursts. The 1.8 GHz quad-core Intel CPU provides ample processing power for the control plane demands of highly dynamic container environments. Organizations running Kubernetes, OpenStack, or VMware deployments particularly appreciate the QFX5110’s ability to support multiple overlay technologies simultaneously, allowing gradual migration between platforms without network constraints. This versatility eliminates the need for dedicated networking silos for different application platforms.
The QFX5110-48S-AFI2 offers compelling economic advantages for spine and leaf topologies when considering both capital and operational expenses. Its port density (48x25G + 8x100G) optimizes the leaf switch form factor, typically requiring fewer switches than competitive offerings for equivalent server connectivity. The consistent Junos OS implementation across the entire Juniper infrastructure reduces operational costs by eliminating the need for platform-specific training and procedures. Power efficiency is another consideration—the QFX5110-48S-AFI2 consumes approximately 15-20% less power than comparable switches, generating significant savings in large deployments. Organizations implementing automation report even greater operational savings, with the QFX5110’s robust API support and programmability enabling up to 80% reduction in configuration time. When these factors are combined with the switch’s reliability (MTBF >200,000 hours), the total cost of ownership over a typical 5-year lifecycle is approximately 25-30% lower than competitive alternatives.
The QFX5110-48S-AFI2 is specifically optimized for the high-volume east-west traffic patterns characteristic of modern distributed applications. Its non-blocking architecture ensures full line-rate performance across all ports simultaneously, preventing bottlenecks even when server-to-server traffic dominates. The 32MB shared buffer effectively manages microbursts that typically occur in distributed application environments. For large-scale deployments, the QFX5110-48S-AFI2’s support for spine and leaf topologies enables linear scalability of east-west bandwidth, simply add more leaf switches as server count increases. Organizations running big data frameworks like Hadoop or distributed databases report consistent performance even during intense shuffle operations. The switch’s advanced flow control and congestion management capabilities, including Dynamic Load Balancing and Explicit Congestion Notification, further optimize east-west traffic flows by intelligently routing packets through the least congested paths in multi-pathing environments.
The QFX5110-48S-AFI2 provides exceptional investment protection for organizations moving toward hybrid cloud models. Its hardware VXLAN capabilities and EVPN support enable seamless integration with both on-premise private clouds and off-premise cloud services. As you extend workloads to public clouds, the QFX5110-48S-AFI2’s data center interconnect capabilities provide secure, high-performance connectivity between environments. The switch’s robust routing capabilities support complex traffic engineering required for optimal workload placement across distributed resources. From a technology evolution perspective, the QFX5110-48S-AFI2’s programmability through APIs and support for emerging standards ensures compatibility with evolving orchestration platforms. Organizations find the QFX5110 particularly valuable during cloud transitions because it can simultaneously support traditional VLANs alongside overlay technologies, allowing applications to migrate at their own pace rather than forcing disruptive flag-day cutover events. This flexibility typically extends the useful lifecycle of the switch to 5-7 years, substantially longer than less adaptable alternatives.
At Network Republic, our end-user accounts are covered by a 1-Year Warranty on all hardware—whether New, New Open Box, New Pull, Refurbished, or Refurbished by Manufacturer —from the date of delivery. This warranty covers hardware defects under normal use and allows for repair, replacement, or in-house credit at our discretion.
For resellers and wholesale purchases, we offer a 30-Day Warranty limited strictly to functional issues or defects upon arrival, including dead-on-arrival (DOA) items; it does not apply to problems arising after prolonged use. Resellers are responsible for inspecting and testing products within the 30-day window. This warranty excludes accidental damage, misuse, cosmetic wear, third-party modifications, and software-related issues unrelated to hardware failure. Check out our full warranty policy here.
Software licenses are not covered under the standard return and warranty policies and need to be activated on the hardware within 7 days of receipt. Any issues need to be reported immediately, within 10 days, so we can issue an exchange. Under no circumstances will refunds be issued for software licenses.
Our team of professionals are experts in networking hardware configurations and can assist you at any time during your purchasing process. We always recommend great price-performance alternatives based on current market price and availability. In need of assistance or looking for a specific part number? Request a quote today or chat with one of our IT specialists.
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