• Stack of four silver arista dcs-7280sr3-40yc6-r network switches with multiple ports and ventilation grilles
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Arista

Arista DCS-7280SR3-40YC6-R | 7280R3 40-Port 25G Switch, 6x 100G QSFP28

DCS-7280SR3-40YC6-R

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Description

The Arista DCS-7280SR3-40YC6-R is a high-performance 1RU data center switch router featuring 40x 25GbE SFP ports and 6x 100GbE QSFP28 uplinks, delivering 800 Gbps of non-blocking switching capacity with 2GB deep packet buffer. Built on the advanced Jericho2 VOQ architecture, this switch supports full Layer 3 routing with BGP, MPLS, Segment Routing, EVPN, VXLAN, and 512-way ECMP, making it ideal for cloud leaf-spine architectures, data center interconnects, and high-performance storage networks. The -R suffix denotes rear-to-front airflow for flexible data center deployment.

Features

Virtual Output Queue (VOQ) architecture eliminates head-of-line blocking
- 2 GB HBM2 deep buffer memory for burst absorption and lossless forwarding
- Full Layer 2 and Layer 3 switch router capabilities
- BGP, OSPF, IS-IS routing protocols with 512-way ECMP
- MPLS support: LDP, RSVP-TE, BGP-LU, Segment Routing with Traffic Engineering
- VXLAN and EVPN for network virtualization and overlay networks
- Over 2 million IPv4 and 1.4 million IPv6 LPM routes for internet peering
- 384K MAC addresses for large-scale Layer 2 deployments
- IEEE 1588v2 PTP hardware support for precision timing
- DANZ telemetry: advanced mirroring, SPAN/TAP aggregation, L2/3/4 filtering
- Accelerated sFlow, IPFIX, and in-band telemetry for network visibility
- LANZ (Latency Analyzer) for real-time congestion detection
- CloudVision integration for centralized management and automation
- Zero-Touch Provisioning (ZTP) for automated deployment
- Hot-swappable redundant power supplies and fans
- OpenConfig, gNMI, JSON-RPC, and eAPI for programmability
- FlexRoute support for expanded routing scale (with appropriate licensing)

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

Port Configuration: 40x SFP28 ports (1G/10G/25G), 6x QSFP28 ports (40G/100G)
- Switching Capacity: 800 Gbps (1.6 Tbps full duplex)
- Forwarding Rate: 600 Mpps (1.0 Bpps)
- Packet Buffer: 2 GB HBM2 deep buffer memory
- Latency: 3.8 µs store-and-forward
- Routing Table: Over 2M IPv4 routes, over 1.4M IPv6 routes, 384K MAC addresses
- CPU: Quad-core x86 processor
- System Memory: 8 GB DRAM
- Flash Storage: 8 GB
- Management: 1x 10/100/1000 Mgmt port, 1x RS-232 console (RJ-45), 1x USB
- Power: 2x hot-swappable AC power supplies (1+1 redundant)
- Cooling: 2x hot-swappable fans (N+1 redundant)
- Airflow: Rear-to-front (port side to fan side)
- Form Factor: 1RU rack-mountable
- Power Consumption: Approximately 300W typical

FAQs

Q: What airflow direction does the DCS-7280SR3-40YC6-R support?
A: The -R suffix indicates rear-to-front airflow, where cool air enters from the fan side and exhausts through the port side. This is suited for reverse-airflow data center deployments. For front-to-rear airflow, see the DCS-7280SR3-40YC6-F variant.

Q: Can the QSFP28 ports be used with breakout cables?
A: Yes, each of the 6x QSFP28 100G ports supports breakout to 4x25G or 4x10G, allowing up to 24 additional lower-speed connections for maximum deployment flexibility.

Q: What Layer 3 routing protocols does this switch support?
A: The 7280SR3-40YC6-R provides full Layer 3 capabilities including BGP, OSPF, IS-IS, MPLS (LDP, RSVP-TE, BGP-LU), Segment Routing with Traffic Engineering, EVPN, VXLAN, and 512-way ECMP for advanced routing and overlay network deployments.

Q: Is this switch suitable for data center leaf-spine architectures?
A: Absolutely. With 40x 25G access ports and 6x 100G uplinks, deep packet buffers, and internet-scale routing tables, the 7280SR3-40YC6-R is purpose-built for high-performance leaf, aggregation, and spine roles in modern cloud and enterprise data centers.

Q: What operating system does this switch run?
A: The switch runs Arista EOS (Extensible Operating System), a modular Linux-based network OS with advanced automation, telemetry, CloudVision integration, Zero-Touch Provisioning, and comprehensive API support for modern network operations.

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