• Stack of four silver arista dcs 7280sr3m 48-port 25g switches with multiple ports and ventilation grilles
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Arista

Arista DCS-7280SR3M-48YC8-R | 7280R3 48-Port 25G Switch, 8x 100G QSFP28

DCS-7280SR3M-48YC8-R

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Description

The Arista DCS-7280SR3M-48YC8-R is a high-performance 1RU data center switch router designed for cloud, content delivery, IP storage, and leaf-spine architectures. With 48 x 25GbE SFP28 ports and 8 x 100GbE QSFP28 uplinks, it delivers 2 Tbps wire-speed performance with 4GB of dynamic deep packet buffering for lossless forwarding. This R-model features rear-to-front airflow with dual AC power supplies, making it ideal for data center deployments requiring internet-scale routing and predictable low-latency performance.

Features

Wire-speed Layer 2 and Layer 3 switching with 2 Tbps non-blocking architecture
- Dynamic deep packet buffering (4GB) with Virtual Output Queue (VOQ) for lossless forwarding
- Internet-scale routing with FlexRoute engine supporting 2M+ IPv4 routes
- Algorithmic ACLs supporting 100,000+ rules with expanded pattern matching
- Full MPLS, Segment Routing, and SR-TE support for service provider deployments
- VXLAN and EVPN with IRB for network virtualization and multi-tenancy
- Advanced timing features including IEEE 1588 PTP (Precision Time Protocol) and SyncE
- Comprehensive QoS with priority queuing, traffic shaping, and congestion management
- sFlow sampling at full forwarding capacity for network visibility
- Hot-swappable redundant power supplies and N+1 fan modules
- IEEE 802.1AE MACsec encryption support on both SFP28 and QSFP28 ports
- CloudVision integration for streaming telemetry, configuration management, and analytics
- Arista EOS with modular, carrier-grade network operating system
- Zero Touch Provisioning (ZTP) and REST API for automation
- Support for 1G/10G/25G/40G/100G multi-rate transceivers
- Digital Optical Monitoring (DOM) on all optical interfaces
- ECC-protected memory for enhanced reliability

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

48 x 25GbE SFP28 ports (supporting 1G/10G/25G)
- 8 x 100GbE QSFP28 uplink ports (40G/100G, breakout to 4x10G or 4x25G)
- Maximum port density: Up to 80 ports with breakout
- Switching capacity: 2 Tbps (4 Tbps full duplex)
- Forwarding rate: 1 Bpps (billion packets per second)
- Packet buffer: 4GB dynamic deep buffering with VOQ architecture
- Latency: As low as 800ns
- MAC address table: Up to 384,000 entries
- IPv4 unicast routes: Over 2 million (standard), over 5 million with R3K variant
- Control plane: Quad-core x86 Intel Atom processor
- Memory: 16GB ECC-protected DRAM
- Flash storage: 4GB, optional SSD
- Power consumption: 155W typical / 325W maximum
- Power supplies: Dual redundant hot-swappable AC (PWR-511-AC)
- Form factor: 1RU rack-mountable
- Dimensions: 1.75"H x 17.4"W x 20.7"D
- Weight: Approximately 20-26 lbs (10-12 kg)
- Airflow: Rear-to-front (R model)
- Operating system: Arista EOS (Extensible Operating System)
- Management: CLI, Web GUI, SNMP, eAPI, JSON RPC, OpenConfig, gNMI

FAQs

Q: What is the difference between the DCS-7280SR3-48YC8-R and the F model?
A: The primary difference is airflow direction. The R model features rear-to-front airflow, while the F model has front-to-rear airflow. All other hardware specifications and software capabilities are identical. Choose the airflow direction based on your data center hot aisle/cold aisle design.

Q: Can the QSFP28 ports be used with breakout cables?
A: Yes, each of the 8 x 100GbE QSFP28 ports supports breakout configurations to 4x25G or 4x10G, allowing you to achieve up to 80 total logical ports in a single 1RU switch for maximum deployment flexibility.

Q: What routing protocols and scale does this switch support?
A: The DCS-7280SR3-48YC8-R supports internet-scale routing with over 2 million IPv4 unicast routes, full BGP, OSPF, IS-IS, MPLS, Segment Routing, EVPN, VXLAN, and 512-way ECMP. It features Arista's FlexRoute engine for carrier-grade routing performance.

Q: Is this switch suitable for leaf-spine data center architectures?
A: Absolutely. This switch is specifically designed for modern leaf-spine fabrics, providing 25GbE server-facing connectivity with 100GbE uplinks to spine switches. The deep packet buffers and VOQ architecture ensure lossless forwarding under heavy traffic loads.

Q: Does this model support network automation and telemetry?
A: Yes, the switch runs Arista EOS with comprehensive automation support including Zero Touch Provisioning (ZTP), eAPI, OpenConfig, gNMI, and full Linux shell access. It integrates natively with Arista CloudVision for centralized management, streaming telemetry, and intent-based networking workflows.

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