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The Arista DCS-7050SX3-48YC12-F is a 1RU, high-performance leaf switch built for cloud-scale data centers, HPC clusters, and latency-sensitive enterprise workloads. As part of the 7050X3 series, it combines 48 lanes of 10/25GbE access with twelve 40/100GbE uplinks, making it ideal for dense server racks that need significant north-south and east-west bandwidth.
With a switching capacity of up to 4.8 Tbps and ultra-low latency around 800 ns, the DCS-7050SX3-48YC12-F delivers predictable performance for microservice architectures, virtualization, and distributed storage fabrics.
Powered by Arista’s 7050X3 architecture, the DCS-7050SX3-48YC12-F delivers up to 4.8 Tbps of non-blocking switching capacity. All 48×25G access ports and 12×100G uplinks can run at line rate simultaneously, ensuring consistent performance under heavy load. This makes the platform ideal for leaf-spine fabrics where oversubscription must be carefully controlled—or eliminated entirely.
For latency-sensitive environments such as financial trading, real-time analytics, and tightly coupled HPC workloads, the DCS-7050SX3-48YC12-F provides predictable, sub-microsecond latency—typically around 800 ns. Tight jitter characteristics help maintain stable application performance even during bursts and micro-congestion events.
The switch offers a balanced mix of dense 25G access and high-bandwidth uplinks:
QSFP28 uplinks support flexible breakout modes (4×25G, 4×10G, or 2×50G depending on optic and configuration), allowing architects to right-size uplink bandwidth to the spine or aggregation layer. This makes the DCS-7050SX3-48YC12-F particularly attractive when you need more uplink density than the Arista DCS-7050SX3-48YC8-F while keeping the same 48×25G access footprint.
The platform supports a wide range of standards-based data center optics and Ethernet cables:
This standards-based approach simplifies interoperability in multi-vendor environments and helps reduce optics and cabling costs over the life of the fabric.
The DCS-7050SX3-48YC12-F is optimized as a leaf switch in modern spine-leaf architectures that rely on overlay networking and multi-tenant segmentation. Key features include:
These capabilities allow operators to build large-scale, multi-tenant fabrics that support private cloud, NFV, and containerized applications with consistent policy and segmentation.
Operational visibility is central to the design of the 7050X3 family. The DCS-7050SX3-48YC12-F supports Arista’s advanced telemetry toolkit:
Together, these tools give network operators the data needed to proactively detect congestion, troubleshoot issues, and tune performance before applications are impacted.
Running on Arista EOS®, the DCS-7050SX3-48YC12-F benefits from a modular, state-driven operating system designed for automation and programmability:
EOS’s single-image architecture and robust rollback capabilities make changes predictable and reduce the risk associated with large-scale configuration updates.
The “-F” suffix indicates front-to-rear airflow, aligning with standard hot/cold aisle data center designs. The DCS-7050SX3-48YC12-F includes:
These characteristics help reduce operating costs while maintaining thermal headroom in dense racks.
The hardware is engineered with environmental responsibility in mind. The DCS-7050SX3-48YC12-F adheres to major compliance standards such as RoHS and WEEE and is designed to align with modern energy-efficiency initiatives. Its construction minimizes hazardous materials and supports responsible recycling at end of life.
Security is integrated into both the hardware platform and EOS software:
Combined with VXLAN/EVPN overlays, these features make the DCS-7050SX3-48YC12-F a strong fit for secure, multi-tenant data centers and cloud environments.
The Arista DCS-7050SX3-48YC12-F is particularly well-suited for:
Arista designs the 7050X3 platforms for long lifecycle deployments, with MTBF ratings in the millions of hours and a mature EOS software train. As EOS and CloudVision continue to evolve—supporting intent-based networking, automation frameworks, and AI-driven operations—the DCS-7050SX3-48YC12-F remains a solid foundation for next-generation architectures.
Compared with earlier-generation Arista hardware (such as the 7050SX2 family) and competing platforms like Cisco Nexus 9300 or Juniper QFX5120 switches, the DCS-7050SX3-48YC12-F offers:
For operators standardizing on 25G access with high uplink fan-out requirements, the DCS-7050SX3-48YC12-F stands out as a compelling option in the 7050X3 portfolio.
If you’re evaluating the Arista DCS-7050SX3-48YC12-F, the following switches offer comparable performance profiles across 25G/100G fabrics, higher uplink capacities, different airflow options, or alternative price-performance positions. These are the most relevant models engineers typically compare when architecting dense leaf layers or mixed-workload data center designs.
Together, these switches form the most common comparison set for architects designing high-density 25G/100G leaf layers, high-throughput aggregation tiers, or modern east-west optimized data center fabrics.
If you are evaluating multiple 7050SX3 models, this guide provides a broader portfolio comparison and “battle card”-style breakdowns:
Arista 7050SX3 Switches: Your Go-To Guide & Battle Card Breakdown
The Arista DCS-7050SX3-48YC12-F brings together dense 25G access, twelve 100G uplinks, rich telemetry, and EOS automation in a compact 1RU chassis. Whether you’re building out a new 25G/100G fabric or upgrading an existing leaf layer for higher east-west capacity, this platform delivers the performance, visibility, and scalability required for modern data centers.
Related Arista 7050X Series models: DCS-7050SX3-48C8-R and DCS-7050SX3-96YC8-F.
It offers 48 25GbE SFP ports and 12 100GbE QSFP ports.
Yes, its high-density port configuration and advanced features make it ideal for high-density environments.
The switch uses a front-to-rear airflow design to ensure efficient cooling.
Yes, it includes dual AC power supplies for enhanced reliability.
It is ideal for cloud computing, machine learning, large-scale data processing, and other high-performance applications.
