DCS-7050SX2-128-R Arista 96 Ports 10GB SFP+ Switch.

Arista DCS-7050SX2-128-R 96 Ports 10GB SFP+ Switch Overview

Advanced 10GbE Switching Platform for Modern Network Infrastructure

The Arista DCS-7050SX2-128-R is a high-density, ultra-low latency Ethernet switch engineered for demanding enterprise and cloud-scale environments. Designed for scalable data center deployments, it delivers exceptional throughput, flexible port configuration, and robust system reliability.

Core Product Highlights

• Manufacturer: Arista Networks
• Model / Part Number: DCS-7050SX2-128-R
• Device Category: Managed Layer 2/Layer 3 Network Switch
• Series: 7050X Series Architecture
• Port Density: 96 x 10 Gigabit SFP+ interfaces
• Uplink Capability: 8 x 40 Gigabit QSFP+ high-speed uplinks

High-Speed Network Interface Configuration

Downlink and Uplink Port Structure

• 96x 10GbE SFP+ ports optimized for server connectivity
• 8x 40GbE QSFP+ uplink ports for aggregation and spine integration
• Designed for high-throughput leaf-spine architectures

Management and Control Interfaces

• 2x Gigabit Ethernet management ports for out-of-band access
• 1x RS-232 RJ45 console port for direct configuration
• 1x USB Type-A port for software upgrades and file transfers

Performance and Hardware Specifications

Switching Performance Metrics

• Switching Capacity: 2.56 Tbps total throughput
• Forwarding Rate: 1440 million packets per second (Mpps)
• Latency: Ultra-low 550 nanoseconds

System Memory and Processing

• CPU: Quad-core x86 architecture processor
• DRAM: Up to 8 GB system memory
• Flash Storage: 4 GB onboard flash memory
• MAC Address Table: Supports up to 288,000 entries
• VLAN Capacity: Up to 4096 VLAN IDs
• Packet Buffer: 16 MB high-speed buffering

Cooling, Airflow, and Physical Design

Thermal Management System

• Back-to-front airflow design optimized for hot aisle/cold aisle data center layouts
• Includes 4x high-efficiency Fan-7002-R modules

Power Supply Configuration

• Dual redundant power supplies included for high availability
• 2x PWR-750AC-R AC power modules pre-installed
• Optional power configurations: PWR-500AC-R, PWR-500AC-F, PWR-750AC-F

Operating System and Network Features

Arista EOS Platform Capabilities

• Runs Arista EOS (Extensible Operating System)
• Supports Feature Licenses Group 2 for advanced networking functions
• Designed for automation, programmability, and network scalability

Enterprise-Grade Network Functionality

• Advanced Layer 2 and Layer 3 routing capabilities
• High availability and redundancy features
• Optimized for cloud data centers and large-scale virtualization environments

Deployment Advantages in Data Center Environments

Ideal Use Cases

• High-performance enterprise switching infrastructure
• Cloud computing and hyperscale data centers
• Virtualized server environments requiring low latency
• Leaf-spine network topology deployments

Key Benefits

• Ultra-low latency switching for real-time applications
• High port density for efficient rack utilization
• Scalable architecture supporting future network expansion
• Energy-efficient and redundant hardware design

Arista DCS-7050SX2-128-R 10GbE SFP+ and 40GbE QSFP+ Switch

The Arista DCS-7050SX2-128-R is a high-density, low-latency data center switch designed for modern cloud-scale environments requiring predictable performance, high throughput, and flexible port configuration. Built on a robust switching architecture, this platform supports advanced Layer 2 and Layer 3 features while maintaining ultra-low latency forwarding characteristics essential for hyperscale data center fabric deployments. The combination of 96 x 10GbE SFP+ ports and 8 x 40GbE QSFP+ uplinks positions this switch as a powerful aggregation or top-of-rack solution optimized for spine-leaf architectures.

Engineered for demanding enterprise, service provider, and cloud data center environments, this switch delivers consistent packet forwarding performance with non-blocking architecture and deep buffering capabilities. Its back-to-front airflow design ensures optimized cooling efficiency in hot aisle/cold aisle deployments, making it suitable for high-density rack environments where thermal control is critical for uptime and hardware longevity.

High-Density Port Configuration and Interface Flexibility

96 x 10GbE SFP+ Downlink Ports

The switch provides a substantial 96-port 10GbE SFP+ interface configuration, enabling dense server connectivity for virtualization clusters, cloud computing nodes, and storage networks. These ports support both fiber and DAC (Direct Attach Copper) connections, offering flexibility for short-range and long-range deployments. This high port density allows organizations to consolidate multiple racks of servers into a single switching layer, reducing operational complexity and cabling overhead.

Scalable Server Connectivity Design

The SFP+ interfaces are optimized for high-speed east-west traffic within data centers, where virtual machine mobility, distributed applications, and containerized workloads require consistent low-latency communication. This architecture is particularly effective in environments leveraging hyper-converged infrastructure (HCI) and software-defined networking (SDN).

8 x 40GbE QSFP+ Uplink Ports

In addition to high-density 10GbE access ports, the Arista DCS-7050SX2-128-R includes 8 uplink ports supporting 40GbE QSFP+ connections. These uplinks provide high-capacity aggregation paths toward spine switches in a leaf-spine architecture, ensuring efficient traffic distribution and minimal oversubscription ratios.

High-Speed Fabric Aggregation

The 40GbE QSFP+ uplinks can be configured for either single 40GbE connections or breakout into multiple 10GbE links, depending on network design requirements. This flexibility allows network engineers to optimize bandwidth allocation dynamically based on workload distribution and growth patterns.

Non-Blocking Switching Fabric and Performance Optimization

Wire-Speed Performance Across All Ports

The switch architecture is designed to deliver wire-speed performance across all ports simultaneously without degradation in throughput. This ensures that east-west traffic within the data center is handled efficiently, reducing bottlenecks commonly found in oversubscribed legacy switching architectures.

Low-Latency Forwarding Engine

At the core of the DCS-7050SX2-128-R lies a high-performance forwarding engine optimized for deterministic latency. This is particularly critical for financial trading systems, real-time analytics platforms, and high-frequency transaction environments where microseconds matter.

Cut-Through Switching Mechanism

The switch utilizes cut-through forwarding techniques, enabling packet forwarding to begin before the entire frame is received. This reduces overall latency and improves application responsiveness in latency-sensitive environments.

Advanced Data Center Networking Features

Layer 2 and Layer 3 Capabilities

The Arista 7050SX2 series supports a comprehensive set of Layer 2 and Layer 3 protocols, making it suitable for both traditional and modern network architectures. It supports VLAN segmentation, link aggregation (LACP), and advanced routing protocols such as OSPF, BGP, and ECMP for scalable routing across distributed environments.

VXLAN and EVPN Support

The switch is optimized for overlay networking technologies such as VXLAN with EVPN control planes, enabling scalable multi-tenant architectures. This is particularly beneficial in cloud environments where network virtualization and tenant isolation are critical.

Multi-Tenant Cloud Networking

By supporting VXLAN-based overlays, the switch enables seamless extension of Layer 2 networks across Layer 3 boundaries, facilitating workload mobility across data center zones and availability regions.

Quality of Service (QoS) and Traffic Management

Advanced QoS capabilities ensure traffic prioritization based on application requirements. This includes classification, marking, shaping, and queuing mechanisms that allow mission-critical workloads to maintain priority over best-effort traffic.

Congestion Control Mechanisms

The switch incorporates congestion management techniques such as ECN (Explicit Congestion Notification) and dynamic buffer allocation, ensuring smooth traffic flow during peak network utilization periods.

Back-to-Front Airflow Design for Optimized Cooling

Thermal Efficiency in High-Density Racks

The back-to-front airflow design of the Arista DCS-7050SX2-128-R ensures that cool air is drawn from the front of the rack and expelled through the rear. This airflow direction aligns with standard data center cooling architectures, improving thermal efficiency and reducing hotspots within high-density deployments.

Hot Aisle / Cold Aisle Compatibility

This airflow configuration is fully compatible with hot aisle/cold aisle containment strategies commonly used in modern data centers. It enhances cooling predictability and reduces the risk of thermal throttling under sustained load conditions.

Energy Efficiency Optimization

Efficient airflow management reduces the need for excessive cooling infrastructure, thereby lowering overall power consumption and contributing to improved PUE (Power Usage Effectiveness) metrics in enterprise environments.

Scalable Leaf-Spine Data Center Architecture Integration

Role as a Leaf Switch

The Arista DCS-7050SX2-128-R is commonly deployed as a leaf switch in leaf-spine architectures. In this role, it provides direct connectivity to servers, storage arrays, and compute nodes while connecting upstream to spine switches via high-speed 40GbE uplinks.

High-Bandwidth East-West Traffic Optimization

Leaf-spine architectures minimize hop count between endpoints, and this switch is optimized for handling large volumes of east-west traffic typical in distributed cloud applications and microservices architectures.

ECMP-Based Load Balancing

Equal-Cost Multi-Path (ECMP) routing ensures efficient distribution of traffic across multiple spine uplinks, reducing congestion and improving overall network resiliency.

Data Center Fabric Scalability

As data center demands grow, the switch supports scalable fabric expansion without requiring major architectural redesigns. Its modular uplink structure ensures seamless integration into expanding network topologies.

High Availability and Redundancy Features

Redundant Power Supply Design

The platform supports redundant power supplies to ensure continuous operation in the event of a power module failure. This redundancy is critical for mission-critical environments requiring 99.999% uptime.

Hot-Swappable Components

Hot-swappable power and fan modules allow maintenance without system downtime, ensuring continuous network availability during hardware replacement or upgrades.

Network Resiliency Protocols

Support for link aggregation, redundant paths, and rapid failover mechanisms ensures minimal disruption during network faults or topology changes.

Graceful Restart and Fast Convergence

Routing protocols supported by the switch include fast convergence mechanisms, ensuring minimal packet loss during failover events.

Advanced Network Automation and Management

Arista EOS Operating System

The switch runs on the Arista Extensible Operating System (EOS), a highly modular and programmable network operating system designed for automation and scalability. EOS provides a single binary image with process-level separation, enhancing stability and upgrade flexibility.

Programmability and API Integration

EOS supports open APIs such as REST, gRPC, and Python-based automation tools, enabling integration with DevOps pipelines and infrastructure-as-code frameworks.

Network Automation Frameworks

Integration with tools like Ansible, Puppet, and Chef allows automated configuration management, reducing manual intervention and configuration errors.

Telemetry and Monitoring Capabilities

Advanced telemetry features enable real-time visibility into network performance metrics. Streaming telemetry allows continuous monitoring of latency, packet loss, and throughput.

Proactive Network Analytics

Network analytics tools provide insights into traffic patterns and anomalies, enabling proactive capacity planning and fault detection before service impact occurs.

Security and Access Control Features

Network Segmentation and Isolation

The switch supports advanced segmentation techniques including VLANs, VRFs, and ACLs, ensuring secure isolation between different network tenants or application domains.

Access Control Lists (ACLs)

Granular ACLs allow administrators to define precise traffic filtering rules, enhancing network security and reducing attack surfaces within the infrastructure.

Control Plane Protection

Control plane policing mechanisms protect the switch from denial-of-service attacks targeting routing and management interfaces.

Secure Management Access

Secure protocols such as SSH, TACACS+, and RADIUS are supported for authenticated and encrypted management access.