Arista DCS-7280CR3K-32D4-R | 32x400G + 4x100G Switch Router

Arista DCS-7280CR3K-32D4-R Switch (Refurbished)

The Arista DCS-7280CR3K-32D4-R is a high-performance, fixed-configuration 400GbE data center switch designed for next-generation spine-and-leaf fabrics, AI/ML clusters, and high-capacity service provider networks. With 32 × 400GbE QSFP-DD ports, 4 × 400GbE QSFP-DD ports for additional uplink/scale flexibility, and a rear-to-front airflow (-R) design, this model is optimized for hot-aisle/cold-aisle data center environments requiring consistent airflow alignment. BrightStar Systems supplies fully tested refurbished DCS-7280CR3K-32D4-R switches, each backed by our 1-Year In-House Warranty. All systems are professionally validated to ensure reliable operation in production environments.

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Arista DCS-7280CR3K-32D4-R Overview

The DCS-7280CR3K-32D4-R is part of Arista’s third-generation 7280R Series, delivering high-density 400GbE connectivity with deep buffer architecture optimized for routing-intensive, congestion-sensitive workloads. Built on advanced Broadcom routing silicon and running Arista EOS, the platform provides deterministic low latency, massive throughput, and advanced telemetry for large-scale IP fabrics. This model is commonly deployed in spine roles within EVPN-VXLAN or IP Clos architectures, as well as in internet exchange, peering, and cloud interconnect environments where predictable performance, high route scale, and 400G-ready infrastructure are critical. For a platform-level overview, see the Arista 7280 Series Switches.

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Key Features & Capabilities

• High-density 400GbE QSFP-DD connectivity for next-generation fabrics
• Rear-to-front airflow (-R) for hot-aisle/cold-aisle data center designs
• 1RU fixed-configuration form factor
• Deep buffer architecture optimized for routing and congestion management
• Support for EVPN-VXLAN, IP routing, and large-scale Clos fabrics
• Low-latency, high-throughput forwarding performance
• Arista EOS with advanced automation and telemetry
• Breakout support for 2 × 200GbE or 4 × 100GbE per port (platform dependent)
• Designed for 400GbE spine and high-capacity aggregation deployments

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Technical Specifications

Model	DCS-7280CR3K-32D4-R
Ports	32 × 400GbE QSFP-DD + 4 × 400GbE QSFP-DD
Switching Capacity	25.6 Tbps
Forwarding Rate	~8 Bpps
Form Factor	1RU
Airflow	Rear-to-Front (-R)
Operating System	Arista EOS

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Common Deployment Use Cases

• 400GbE spine switch in large-scale data center fabrics
• AI / ML cluster backbones requiring deterministic, high-bandwidth fabrics
• Internet exchange and peering infrastructure migrating from 100GbE to 400GbE
• Cloud interconnect and service provider aggregation environments

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Related Arista 7280 Models

• DCS-7280CR3-32P4 – 32 × 100GbE with 4 × 400GbE uplinks for mixed-speed spine deployments.
• DCS-7280SR2-48YC6 – High-density 25GbE leaf with 100GbE uplinks.
• DCS-7280CR2-60 – 60 × 100GbE platform for large-scale routing fabrics.

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Additional Resources

The following resources provide deeper context for evaluating the DCS-7280CR3K-32D4-R within a broader Arista switching strategy:

• Arista 7280R Series Definitive Guide – In-depth coverage of SR, CR, and R-series architectures, use cases, and generational differences.
• Arista vs Cisco Networking Hardware – A practical comparison for data center and service provider environments.

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Buying or Selling Arista 7280 Hardware

BrightStar Systems specializes in used and refurbished Arista networking equipment for enterprise, service provider, and internet exchange environments. We support both expansion projects and hardware lifecycle transitions with tested, production-ready systems.

• Buy Used Arista Switches
• Sell Used Arista Switches

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Warranty & Testing

All DCS-7280CR3K-32D4-R switches are tested in-house and include a 1-Year BrightStar Systems Warranty. Hardware validation covers system health, high-speed port functionality, power supplies, fans, airflow orientation, and overall readiness for production deployment.

Also available: DCS-7280CR3K-32D4-F with front-to-rear airflow.

<ul>
<li style=”font-weight: 400;”><span style=”font-weight: 400;”>1-Year BrightStar warranty for end user customers</span></li>
<li style=”font-weight: 400;”><span style=”font-weight: 400;”>90-Day BrightStar Warranty for resellers</span></li>
</ul>

<ul>
<li style=”font-weight: 400;”><span style=”font-weight: 400;”>Free FedEx Ground shipping within the United States</span></li>
<li style=”font-weight: 400;”><span style=”font-weight: 400;”>FedEx Overnight shipping available as well</span></li>
<li style=”font-weight: 400;”><span style=”font-weight: 400;”>FedEx International Shipping available for customers outside of the United States</span></li>
</ul>