DCS-7500R-48S2CQ-LC Arista 48-Port SFP+ 1/10GbE and 2-Port 100GbE QSFP Line Card.

Arista DCS-7500R-48S2CQ-LC 48-Port QSFP Line Card Overview

The Arista DCS-7500R-48S2CQ-LC is a high-density, carrier-grade Ethernet line card engineered for next-generation data center switching platforms. Designed for the Arista 7500R Series chassis, this advanced networking module delivers exceptional scalability, ultra-low latency, and high-throughput performance for modern cloud, enterprise, and hyperscale environments.

Product Information

• Manufacturer: Arista Networks
• Part Number: DCS-7500R-48S2CQ-LC
• Product Type: Modular Line Card
• Platform Compatibility: Arista 7500R Series
• Total Ports: 48 x SFP+ + 2 x QSFP100

Port Configuration

• 48 x SFP+ ports supporting 1GbE / 10GbE speeds
• 2 x QSFP ports supporting 100GbE uplinks
• Optimized for high-performance switching fabrics

Supported Ethernet Speeds

• 1 Gigabit Ethernet (1GbE)
• 10 Gigabit Ethernet (10GbE)
• 100 Gigabit Ethernet (100GbE)

SFP+ Interface Capabilities

• Supports both 1GbE and 10GbE transceivers
• Flexible fiber and copper connectivity options
• Low-latency data transmission

QSFP100 Uplink Features

• 2 x 100GbE QSFP ports
• High-speed backbone aggregation
• Supports advanced optical transceivers

Benefits of Modular Architecture

• Easy upgrade and replacement capability
• Reduced infrastructure downtime
• Efficient data center expansion
• Improved hardware lifecycle management
• Flexible network design optimization

Long-Term Infrastructure Value

• Supports evolving Ethernet standards
• Future-proof 100GbE uplink capability
• Designed for scalable network growth
• Optimized for automation and cloud orchestration

Arista DCS-7500R-48S2CQ-LC 48-Port 2-Port Line Card Overview

The Arista DCS-7500R-48S2CQ-LC line card is a high-performance, data center-class switching module designed for deployment within Arista’s 7500R Series modular chassis platforms. Built to deliver exceptional scalability, ultra-low latency packet processing, and cloud-grade network performance, this advanced line card supports modern enterprise, hyperscale, and service provider infrastructures requiring high-density 10 Gigabit Ethernet aggregation and 100 Gigabit Ethernet uplink connectivity.

Engineered by Arista Networks, Inc., this line card is optimized for large-scale data center fabrics, high-frequency trading networks, cloud service providers, AI/ML clusters, and distributed enterprise environments. It provides a powerful combination of 48 SFP+ ports supporting 1/10GbE and 2 QSFP28 ports supporting 100GbE, enabling seamless integration into modern spine-leaf architectures.

The DCS-7500R-48S2CQ-LC is designed for environments that demand deterministic performance, wire-speed forwarding, and high availability under heavy traffic loads. Its architecture supports scalable bandwidth expansion while maintaining consistent latency characteristics essential for mission-critical workloads.

High-Density 10GbE Aggregation and 100GbE Uplink Architecture

The Arista DCS-7500R-48S2CQ-LC line card provides a dense aggregation layer with 48 SFP+ ports supporting both 1GbE and 10GbE connectivity. This flexibility allows enterprises to integrate legacy infrastructure alongside modern high-speed server environments without requiring immediate full-scale upgrades.

The inclusion of 2 QSFP28 ports supporting 100GbE uplinks ensures high-bandwidth connectivity between leaf and spine layers in data center fabrics. This dual-speed architecture supports scalable network expansion and efficient traffic distribution across large-scale infrastructures.

Flexible Multi-Speed Port Design

The multi-speed SFP+ interfaces allow dynamic compatibility with various transceivers and optical modules, enabling seamless integration into heterogeneous networking environments. This ensures that enterprises can support both legacy and next-generation infrastructure within the same switching fabric.

The adaptability of 1GbE and 10GbE support enhances deployment flexibility across server clusters, storage networks, virtualization platforms, and enterprise access layers.

High-Capacity 100GbE Uplink Connectivity

The dual 100GbE QSFP28 uplinks provide ultra-high-speed connectivity for spine switching, aggregation layers, and inter-data center communication. These uplinks ensure minimal congestion and optimized east-west traffic flow across distributed cloud environments.

This high-bandwidth capability is essential for modern applications such as AI model training, big data analytics, cloud-native microservices, and real-time distributed computing systems.

Ultra-Low Latency and High-Performance Switching Architecture

The Arista DCS-7500R-48S2CQ-LC is engineered for environments where latency sensitivity is critical. It delivers deterministic performance with extremely low forwarding delays, making it ideal for high-frequency trading, real-time analytics, and large-scale distributed computing workloads.

By leveraging advanced switching silicon and optimized packet processing pipelines, the line card ensures consistent performance under heavy traffic conditions while maintaining predictable latency characteristics.

High-Speed Packet Processing Efficiency

Efficient packet processing is essential for maintaining wire-speed performance across all ports. The DCS-7500R-48S2CQ-LC utilizes optimized forwarding engines that handle large-scale traffic flows without performance degradation.

This ensures that enterprise networks can support high-density workloads without experiencing bottlenecks or throughput limitations.

Low-Jitter Network Performance

Low jitter performance is critical for applications such as financial trading systems, cloud gaming infrastructures, and real-time communication platforms. The line card maintains stable latency characteristics even under peak traffic conditions.

Advanced Data Center Fabric Integration

The Arista DCS-7500R-48S2CQ-LC line card is designed for seamless integration into modern data center fabrics. It supports scalable architectures that enable high-performance connectivity between compute, storage, and networking layers.

This integration capability makes it suitable for hyperscale cloud providers, enterprise data centers, and service provider networks requiring high-bandwidth, low-latency interconnectivity.

Leaf-Spine Architecture Optimization

The line card is optimized for leaf-spine architectures that dominate modern data center design. It ensures efficient traffic flow between leaf switches and spine nodes while minimizing oversubscription and congestion.

This architecture improves scalability and simplifies network design while supporting large-scale distributed workloads.

High-Bandwidth Fabric Connectivity

High-bandwidth connectivity is essential for modern data center operations involving virtualization, container orchestration, and distributed cloud services. The 100GbE uplinks provide the necessary bandwidth for inter-switch communication and data synchronization.

Cloud-Scale Networking and Virtualization Support

The Arista DCS-7500R-48S2CQ-LC supports cloud-scale networking environments that require flexible, high-performance infrastructure for virtualized workloads and containerized applications.

It is optimized for environments that rely on dynamic resource allocation, microservices architecture, and distributed computing frameworks.

Virtual Machine Network Optimization

Virtualized environments require efficient network handling to ensure smooth communication between virtual machines, storage systems, and orchestration platforms. This line card supports high-density VM deployments with consistent network performance.

It reduces latency and improves bandwidth availability for virtualized workloads running across distributed infrastructure.

Containerized Application Support

Modern cloud-native applications rely heavily on container orchestration platforms such as Kubernetes. The DCS-7500R-48S2CQ-LC provides the necessary network performance to support rapid container scaling and service communication.

This ensures reliable microservices communication and efficient load balancing across distributed systems.

Multi-Tenant Network Isolation

Multi-tenant environments require strict isolation between workloads. The line card supports advanced segmentation capabilities that improve security and resource allocation across shared infrastructure.

Enterprise-Grade Reliability and Hardware Resiliency

The Arista DCS-7500R-48S2CQ-LC line card is designed with enterprise-grade reliability and hardware resiliency features that ensure continuous operation in mission-critical environments.

Its robust design supports high availability configurations, redundant systems, and fault-tolerant networking architectures.

High Availability Network Operations

High availability ensures uninterrupted network services even during hardware failures or maintenance operations. The line card is engineered to support redundant architectures that minimize downtime.

This is essential for enterprises operating mission-critical applications requiring continuous connectivity.

Advanced Network Scalability and Expansion Capabilities

The Arista DCS-7500R-48S2CQ-LC line card provides exceptional scalability, enabling organizations to expand their network infrastructure without compromising performance or efficiency.

Its modular design allows seamless integration into existing chassis systems while supporting future network expansion requirements.

Modular Data Center Expansion

Modular architecture enables organizations to expand network capacity incrementally based on operational needs. This reduces capital expenditure while ensuring infrastructure flexibility.

The line card supports scalable deployment strategies for evolving enterprise and cloud environments.

Future-Ready Networking Infrastructure

Future-ready design ensures compatibility with emerging networking technologies and evolving data center requirements. This provides long-term investment protection for enterprise infrastructure.