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Delivering reliable IT hardware solutions since 2009.
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You’ll find warranty coverage on the majority of our hardware.*
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Part Number: DCS-7280QR-C36-R
Description: The Arista DCS-7280QR-C36-R is a high-performance, 100G data center switch with 36 QSFP+ ports, designed for cloud and enterprise networks. Part of the Arista 7280R Series, it features deep buffering, high scalability, and rear-to-front airflow, ensuring efficient cooling in demanding environments.
Category: Switches
15+ Years of Proven Excellence
Delivering reliable IT hardware solutions since 2009.
Same-Day Shipping
On all on-hand orders placed before 2 pm CST.
Limited Lifetime Warranty
You’ll find warranty coverage on the majority of our hardware.*
Terms & Conditions*
The Arista DCS-7280QR-C36-R represents a significant advancement in data center switching technology, delivering exceptional performance for demanding network environments. This powerful platform from Arista Networks combines remarkable bandwidth capacity with reliable data transmission capabilities, making the DCS-7280QR-C36-R suitable for mission-critical applications. The DCS-7280QR-C36-R can be configured with a combination of high-speed ports, including configurations with 24x 40Gb QSFP+ and 12x 100Gb QSFP28 interfaces, providing flexible connectivity options for diverse deployment scenarios.
With its sophisticated architecture, the 7280QR-C36-R delivers consistent, predictable performance even under demanding workloads. Organizations implementing the DCS-7280QR-C36-R experience improved application responsiveness and enhanced operational efficiency, directly contributing to better business outcomes. Arista Networks has thoroughly tested the DCS-7280QR-C36-R to ensure reliable operation in the most demanding environments, providing customers with confidence in their purchase decision and long-term investment protection.
The Arista DCS-7280QR-C36-R implements an innovative thermal architecture optimized for specific data center cooling requirements. The “R” in DCS-7280QR-C36-R specifically indicates rear-to-front airflow, where cool air is drawn in from the rear (non-port side) and hot air is exhausted from the front (port side) of the switch. This specialized design makes the 7280QR-C36-R ideal for data centers with reverse airflow requirements or hot-aisle/cold-aisle configurations where equipment faces hot aisles.
Unlike some competitors that offer limited cooling options, the DCS-7280QR-C36-R is part of Arista’s flexible switch portfolio that includes multiple airflow variants to accommodate diverse data center designs. This demonstrates Arista Networks’ commitment to meeting specific customer requirements rather than forcing data centers to adapt to limited equipment options. The DCS-7280QR-C36-R’s thermal design contributes to overall data center efficiency while ensuring optimal operation of the switch itself, making it an ideal choice for facilities with specific cooling architectures.
The DCS-7280QR-C36-R features sophisticated monitoring capabilities that provide deep visibility into network performance and health. Through Arista’s advanced monitoring tools, the 7280QR-C36-R enables real-time tracking of traffic patterns, queue utilization, and system resources, allowing network administrators to proactively address potential issues before they impact service. The DCS-7280QR-C36-R supports comprehensive telemetry features that stream detailed operational data to management systems for analysis and visualization.
Network operators can leverage the DCS-7280QR-C36-R’s monitoring capabilities to optimize performance, plan capacity expansions, and troubleshoot complex issues with greater efficiency. The DCS-7280QR-C36-R integrates with Arista’s network-wide visibility tools to provide cohesive monitoring across heterogeneous environments. This advanced monitoring ecosystem makes the 7280QR-C36-R an ideal platform for organizations that require deep network insights to support mission-critical services and applications.
The DCS-7280QR-C36-R runs Arista’s EOS (Extensible Operating System), a modern, programmable network operating system that enhances both functionality and manageability. EOS provides the 7280QR-C36-R with a stable, feature-rich foundation that supports advanced networking protocols alongside programmability features that simplify automation. The DCS-7280QR-C36-R benefits from EOS’s unique architecture that separates the control plane from the data plane, ensuring continued forwarding even during control plane operations.
Network administrators can leverage the DCS-7280QR-C36-R’s programmable interfaces to implement data-driven operational models that improve efficiency and reduce management complexity. The 7280QR-C36-R supports sophisticated features that enable seamless integration with existing management frameworks and automation tools. These capabilities make the DCS-7280QR-C36-R an ideal platform for organizations focused on building modern, programmable network infrastructures that deliver both performance and operational excellence.
The Arista DCS-7280QR-C36-R features a robust hardware platform engineered for reliability and performance in demanding data center environments:
| Feature | Specification |
| Form Factor | 1RU, rack-mountable |
| Dimensions (W × D × H) | 17.5″ × 20.5″ × 1.75″ (44.5 × 52.1 × 4.4 cm) |
| Weight | 24 lbs (10.9 kg) |
| Ports | Flexible configurations including 24x 40Gb QSFP+ and 12x 100Gb QSFP28 |
| Switching Capacity | Up to 3.6 Tbps |
| Forwarding Rate | Up to 2.6 Bpps |
| Latency | 1-2 microseconds |
| CPU | Quad-core x86 |
| System Memory | 8 GB (expandable) |
| Packet Buffer | 32 MB |
| Flash Storage | 4 GB |
| Power Supply | 2 × redundant hot-swappable |
| Typical Power Consumption | 650W |
| Maximum Power Consumption | 800W |
| Airflow Direction | Rear-to-front |
| Operating Temperature | 0° to 40°C (32° to 104°F) |
| Mean Time Between Failures | >300,000 hours |
The DCS-7280QR-C36-R is designed with reliability as a core principle, featuring redundant power supplies and cooling components that ensure continued operation even in demanding conditions. Each port on the 7280QR-C36-R supports a variety of transceivers, providing flexible connectivity options for diverse deployment scenarios. The switch includes hardware acceleration for routing and switching functions, ensuring wire-speed performance across all ports simultaneously.
The DCS-7280QR-C36-R runs Arista EOS (Extensible Operating System), providing a comprehensive set of networking features:
| Feature Category | Key Capabilities |
| Layer 2 | 802.1Q VLANs, MLAG, LACP, LLDP, Q-in-Q |
| Layer 3 | BGP, OSPF, IS-IS, RIP, Static Routing, VRRP |
| IPv6 | Full IPv6 support, OSPFv3, BGP4+ |
| Multicast | IGMP, PIM-SM, PIM-SSM, Anycast RP |
| High Availability | NSF, SSO, ISSU, Redundant Supervisor |
| Security | ACLs, TACACS+, RADIUS, SSH, TLS |
| QoS | 8 queues per port, WRED, Hierarchical QoS |
| Management | JSON-RPC, REST API, SNMP, sFlow, XMPP |
| Automation | ZTP, Puppet, Chef, Ansible, Python |
| Monitoring | LANZ, VM Tracer, Path Tracer, sFlow |
The DCS-7280QR-C36-R benefits from Arista’s consistent EOS software across its entire product line, ensuring operational consistency when deploying mixed hardware platforms. Arista Networks provides regular software updates for the 7280QR-C36-R, delivering both new features and security patches to maintain optimal functionality. The software architecture of the DCS-7280QR-C36-R supports hitless upgrades, allowing software updates without service interruption.
The DCS-7280QR-C36-R delivers exceptional performance metrics suitable for demanding data center applications:
| Performance Metric | Capability |
| MAC Address Table | 288,000 entries |
| IPv4 Routes | 128,000 (host) / 82,000 (LPM) |
| IPv6 Routes | 64,000 (host) / 41,000 (LPM) |
| ACLs | 12,000 |
| VLANs | 4,094 |
| IGMP Groups | 16,000 |
| Jumbo Frame Support | 9,216 bytes |
| ECMP Paths | 64-way |
| MLAG | 16-way |
| Mirroring Sessions | 8 |
The DCS-7280QR-C36-R provides the processing capacity required for large-scale data centers with substantial routing and switching requirements. Its deep buffer architecture ensures consistent performance during traffic microbursts that are common in modern applications. The 7280QR-C36-R’s forwarding capabilities maintain deterministic performance even when multiple features are enabled simultaneously.
The DCS-7280QR-C36-R offers specific advantages compared to other models in the Arista 7280 Series:
| Feature | DCS-7280QR-C36-R | DCS-7280QR-C36-F | DCS-7280SR-48C6 |
| Form Factor | 1RU | 1RU | 1RU |
| Port Options | 24x 40Gb QSFP+, 12x 100Gb QSFP28 | 36x 40Gb QSFP+ | 48x 10G, 6x 100G |
| Switching Capacity | Up to 3.6 Tbps | 2.88 Tbps | 3.0 Tbps |
| Airflow | Rear-to-front | Front-to-rear | Various Options |
| Typical Use Case | Special Cooling DC | Standard DC | Mixed Speed DC |
| Buffer Size | 32 MB | 32 MB | 12 MB |
| Target Environment | Non-Standard Cooling | Standard Data Center | Mixed Speed DC |
The DCS-7280QR-C36-R is positioned as a high-performance solution within the 7280 series from Arista, with specialized cooling design for specific data center requirements. The “R” in DCS-7280QR-C36-R denotes the rear-to-front airflow direction, in contrast to the standard front-to-rear airflow in the DCS-7280QR-C36-F. Both new and refurbished units of the DCS-7280QR-C36-R are available in the market, with refurbished options offering additional value while maintaining Arista’s quality standards and support options.
The Arista DCS-7280QR-C36-R achieves cost-effectiveness through its high-density port configuration that maximizes the number of high-speed connections in a compact 1RU form factor, optimizing both capital expenditure and data center space utilization. Its integrated architecture delivers comprehensive networking capabilities without requiring additional specialized devices, reducing both acquisition costs and ongoing operational expenses. The DCS-7280QR-C36-R is available in both new and as tested refurbished units from reputable sellers, providing additional purchase options that can further enhance value while maintaining the same reliable performance capabilities.
The DCS-7280QR-C36-R supports all standard networking protocols and integrates seamlessly with existing Arista and non-Arista infrastructure through industry-standard implementations, reducing migration risks when introducing this high-performance switch to established networks. Its comprehensive interoperability has been verified through extensive testing with equipment from other manufacturers, ensuring compatibility with the diverse systems typically found in evolving data centers. The 7280QR-C36-R can be added to the network with confidence that it will work alongside existing equipment while providing a clear path to higher performance and increased capacity for organizations with growing data transfer requirements.
The DCS-7280QR-C36-R’s high-speed port options, including 40Gb QSFP+ and 100Gb QSFP28 interfaces, provide substantial bandwidth capacity for current and future applications, ensuring the platform can accommodate growing traffic demands as requirements evolve. Its programmable architecture supports feature evolution through software updates, allowing new capabilities to be deployed throughout the product lifecycle without hardware replacement. The 7280QR-C36-R benefits from Arista Networks’ ongoing commitment to the EOS operating system, ensuring that the switch continues to receive new features and security updates that extend its useful life and protect the initial investment.
The DCS-7280QR-C36-R implements comprehensive reliability features including redundant, hot-swappable power supplies and cooling components that maintain operation during individual component failures, minimizing the risk of service interruptions. Its EOS operating system architecture separates state information from process operation, ensuring that individual process failures don’t impact overall switch functionality, which substantially improves software reliability compared to monolithic operating systems. The 7280QR-C36-R supports advanced high-availability protocols and features that provide network-level redundancy, ensuring critical data transmission remains available even in the event of component failures or during maintenance activities.
Organizations should carefully evaluate their cooling architecture, as the DCS-7280QR-C36-R features rear-to-front airflow which must align with the data center’s thermal design to ensure proper cooling and optimal operation in environments where equipment intake faces the hot aisle. When planning connectivity, consideration should be given to the optical transceiver requirements and availability, as the appropriate QSFP+ and QSFP28 modules must be selected to match distance, power, and compatibility requirements for your specific deployment. IT teams should check stock availability of the DCS-7280QR-C36-R and related accessories when planning deployments, as the specialized nature of this model with its rear-to-front airflow may affect lead times compared to more standard configurations.
At Network Republic, our end-user accounts are covered by a 1-Year Warranty on all hardware—whether New, New Open Box, New Pull, Refurbished, or Refurbished by Manufacturer —from the date of delivery. This warranty covers hardware defects under normal use and allows for repair, replacement, or in-house credit at our discretion.
For resellers and wholesale purchases, we offer a 30-Day Warranty limited strictly to functional issues or defects upon arrival, including dead-on-arrival (DOA) items; it does not apply to problems arising after prolonged use. Resellers are responsible for inspecting and testing products within the 30-day window. This warranty excludes accidental damage, misuse, cosmetic wear, third-party modifications, and software-related issues unrelated to hardware failure. Check out our full warranty policy here.
Software licenses are not covered under the standard return and warranty policies and need to be activated on the hardware within 7 days of receipt. Any issues need to be reported immediately, within 10 days, so we can issue an exchange. Under no circumstances will refunds be issued for software licenses.
Our team of professionals are experts in networking hardware configurations and can assist you at any time during your purchasing process. We always recommend great price-performance alternatives based on current market price and availability. In need of assistance or looking for a specific part number? Request a quote today or chat with one of our IT specialists.

