DCS-7300X-64S-LC Arista 48x 10GB SFP+ 4x 40GB QSFP+ Switch Line Card

DCS-7300X-64S-LC 48x 10GB SFP+ 4x 40GB Switch Overview

The Arista DCS-7300X-64S-LC 48x 10GB SFP+ 4x 40GB QSFP+ Switch Line Card represents a high-density, performance-driven networking solution designed for modern data center and enterprise core environments. Built to integrate seamlessly with the Arista 7300X Series modular switching platform, this line card is engineered to provide exceptional scalability, deterministic performance, and advanced feature capabilities required in cloud-scale, virtualization-heavy, and latency-sensitive infrastructures. As part of the broader portfolio developed by :contentReference[oaicite:0]{index=0}, this switch line card is optimized for software-defined data centers and high-performance computing networks that demand reliability, flexibility, and future-proof architecture.

Positioning Within the Arista 7300X Modular Platform

The Arista DCS-7300X-64S-LC is specifically designed for deployment within the modular chassis of the 7300X Series, delivering a combination of 10 Gigabit and 40 Gigabit Ethernet interfaces. The 48 SFP+ ports provide 10GbE connectivity ideal for server aggregation and top-of-rack uplinks, while the four QSFP+ ports offer 40GbE high-bandwidth uplink options for spine or core connectivity. This balanced port configuration allows network architects to design flexible topologies that accommodate current traffic demands while maintaining headroom for future expansion.

High-Density 10GbE Connectivity with SFP+ Ports

Optimized for Server and Access Layer Aggregation

The 48x 10GB SFP+ interfaces deliver dense 10GbE connectivity, making the Arista DCS-7300X-64S-LC an ideal solution for aggregation layers in leaf-spine architectures. These ports support a wide range of optical and copper transceivers, enabling compatibility with short-reach, long-reach, and direct-attach cabling. This flexibility allows organizations to optimize cabling strategies based on data center layout, rack density, and budget constraints.

Flexible Media Support

SFP+ ports on this line card are compatible with multiple 10GbE optical standards, including SR, LR, and DAC configurations. This adaptability ensures that the switch line card can be deployed in both short-distance rack-level connections and extended cross-data-center interconnect scenarios. By supporting modular transceivers, the line card enhances lifecycle management, allowing upgrades and replacements without hardware overhaul.

Low Latency and High Throughput

Designed for performance-sensitive applications such as financial trading platforms, high-frequency data processing, and virtualization clusters, the Arista DCS-7300X-64S-LC maintains low and predictable latency. Its architecture supports non-blocking switching and deep buffering, ensuring smooth traffic flow even during microbursts or peak utilization periods.

40GbE QSFP+ Uplink Capability

High-Bandwidth Spine Connectivity

The four integrated 40GB QSFP+ ports provide robust uplink capacity, enabling seamless integration into spine switches or core aggregation layers. These uplinks are critical in leaf-spine designs where east-west traffic dominates. The QSFP+ interfaces can also support breakout configurations, allowing each 40GbE port to be split into four 10GbE links where needed, further increasing deployment flexibility.

Scalable Network Growth

By incorporating 40GbE uplinks alongside 10GbE downlinks, the Arista DCS-7300X-64S-LC facilitates gradual scaling strategies. Organizations can initially deploy the line card for 10GbE aggregation and later expand backbone capacity without replacing hardware. This forward-looking approach reduces total cost of ownership and supports evolving bandwidth requirements driven by virtualization, cloud adoption, and high-performance storage systems.

Advanced Data Center Architecture Support

Software-Defined Networking Integration

As a component of the Arista 7300X ecosystem, the DCS-7300X-64S-LC operates on Arista’s Extensible Operating System (EOS), delivering programmability, automation, and network visibility. EOS supports open standards and APIs, allowing integration with orchestration tools and SDN controllers. This enables automated provisioning, real-time telemetry, and dynamic network policy enforcement.

VXLAN and Overlay Networking

Modern data centers rely on overlay technologies such as VXLAN to extend Layer 2 networks across Layer 3 infrastructures. The Arista DCS-7300X-64S-LC is engineered to support these advanced features, enabling scalable multi-tenant environments. This makes it suitable for cloud service providers, managed hosting platforms, and large enterprises implementing private cloud architectures.

Support for Virtualized and Containerized Workloads

With the rise of hyperconverged infrastructure and container orchestration platforms, networking hardware must adapt to dynamic and high-volume east-west traffic patterns. The Arista DCS-7300X-64S-LC supports large MAC address tables, advanced routing protocols, and dynamic network segmentation to accommodate rapidly changing workloads. Its architecture ensures stable connectivity even as virtual machines and containers are provisioned or migrated in real time.

High-Performance Computing Environments

HPC clusters demand ultra-low latency and high throughput. The DCS-7300X-64S-LC’s robust switching capabilities make it suitable for scientific research labs, financial analytics firms, and AI-driven data processing environments where large datasets must be transferred rapidly between nodes.

Cloud Service Provider Networks

Cloud operators benefit from the scalability and programmability offered by Arista’s modular switching architecture. The DCS-7300X-64S-LC supports multi-tenant segmentation and large-scale routing tables, enabling cloud providers to deliver reliable and isolated services to diverse customer bases.

Security and Network Segmentation Capabilities

Layer 2 and Layer 3 Security Features

The Arista DCS-7300X-64S-LC supports comprehensive Layer 2 and Layer 3 security mechanisms, including ACLs, VLAN segmentation, and dynamic routing protocol authentication. These features protect against unauthorized access and help enforce policy-based network segmentation.

Compatibility and Deployment Flexibility

Seamless Integration with Existing Infrastructure

The Arista DCS-7300X-64S-LC integrates seamlessly into existing Arista-based environments and interoperates with multi-vendor networks using open standards. This flexibility supports hybrid deployments where legacy systems coexist with modern high-speed switching platforms.

Versatile Data Center Topologies

Whether deployed in traditional three-tier architectures or modern spine-leaf designs, this line card provides the port density and bandwidth required to meet demanding application needs. Its versatility ensures alignment with diverse network strategies and evolving IT roadmaps.