

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
JUNIPER QFX5120-48Y-AFO 48x 10/25GbE SFP28 8x 40/100GbE Network Switch Dual PSU
comes with rails.Excess inventory from major tech company. TESTED AND WORKING. Please take the time to review the actual picture of the unit for extra reference on the item, unit pictured is the actual item you will be receiving. Units may have signs of wear, blemishes, scratches, discoloration, dents, etc. Be advised, for units that have multiple quantities. Please keep in mind that, some units may have more wear than others. No accessories provided. Please feel free to take the time to contact us with questions or concerns before offerding.QFX5120-48Y-AFO — High-Performance Switching for Modern Data CentersThe Juniper QFX5120-48Y-AFO is a 1U, top-of-rack switch engineered for high-density 25GbE and 100GbE environments. With 48 ports of 1/10/25GbE and 8 uplink ports of 40/100GbE, it supports high-speed east-west traffic and scalable fabric integration. Its front-to-back airflow and dual AC power supplies make it ideal for structured data center deployments with strict thermal and redundancy requirements. Key Features:
Built on the Broadcom Trident 3 chipset, the Juniper QFX5120-48Y-AFO delivers sub-microsecond latency and hardware-accelerated packet forwarding. It supports up to 288,000 MAC addresses and 128,000 IPv4/IPv6 routes, making it suitable for both Layer 2 and Layer 3 networks. Integrated hardware-based classification and filtering allow for deep packet inspection and QoS enforcement without compromising performance.
Advanced Telemetry and Automation SupportDesigned for operational visibility and efficiency, the Juniper QFX5120-48Y includes native support for Juniper Telemetry Interface (JTI), delivering high-frequency, low-latency metrics. The QFX5120-48Y also supports gRPC, OpenConfig, and sFlow for standards-based telemetry streaming. Zero Touch Provisioning (ZTP) and support for Junos Evolved CLI, REST APIs, Ansible, and Python ensure seamless integration into automated workflows and simplify large-scale deployments.
High Throughput and Flexible Port ConfigurationWith a non-blocking switching capacity of 2.56 Tbps and throughput of 1.44 Bpps, the Juniper QFX5120-48Y is optimized for performance-intensive environments. The 48 SFP28 access ports support speeds of 1G/10G/25G, while the 8 QSFP28 uplinks support 40G/100G or breakouts to 4x10G or 4x25G, offering backward compatibility and deployment flexibility.
Enterprise-Ready Hardware and Environmental EfficiencyThe Juniper QFX5120-48Y-AFO includes redundant, hot-swappable AC power supplies, front-to-back airflow, and typical power consumption around 300W, depending on optics and traffic. The QFX5120-48Y ships with standard rack-mount rails for 19” configurations and offers USB console access along with NETCONF and REST API support for modern automation tools.
Regulatory Compliance and Environmental StandardsJuniper ensures compliance with major environmental and safety standards, including:
These certifications support global deployment requirements and sustainable IT practices.
Fabric Integration and Scalable ArchitecturesThe QFX5120-48Y-AFO supports EVPN-VXLAN, MPLS, and Juniper’s Virtual Chassis Fabric (VCF), making it ideal for multi-tenant cloud environments and distributed data center topologies. This flexibility allows you to scale easily across leaf-spine architectures, aggregation layers, or even regional edge deployments.
Security Built InSecurity is integrated at every layer. The Juniper QFX5120-48Y-AFO supports MACsec encryption on uplinks, Role-Based Access Control (RBAC), and Control Plane Policing (CoPP) for DoS protection. Secure boot and digitally signed software images ensure end-to-end integrity. For centralized visibility and policy enforcement, it integrates with Juniper Security Director and the Mist Cloud.
Deployment ScenariosThe QFX5120-48Y-AFO is a high-performance, scalable switch engineered to handle demanding data center workloads with low latency and high throughput. Its combination of high-speed ports and advanced features makes it suitable for various deployment scenarios, from core data center fabrics to edge and colocation environments. Below are key use cases where this model excels.
Top-of-Rack (ToR)The QFX5120-48Y-AFO connects servers with 48 fast 25GbE ports, minimizing latency and supporting high-performance workloads like virtualization and cloud applications.
Leaf in Spine-Leaf FabricsAs a leaf switch, it aggregates traffic using 8 x 100GbE uplinks, enabling scalable and efficient data center fabrics with features like overlay networking and traffic segmentation.
NVMe Storage AggregationThis switch handles high-speed NVMe storage traffic with ample bandwidth and buffering, ensuring smooth data flow between storage nodes and controllers.
Edge & ColocationThe Juniper QFX5120-48Y-AFO supports secure multi-tenant environments with advanced segmentation, ideal for edge data centers and colocation sites needing flexible, scalable connectivity.
Use Cases by IndustryThe QFX5120-48Y-AFO serves a wide range of verticals:

Documentation