• Stack of four silver arista dcs-7280sr3mk-48yc8a-s-r 48-port 25g and 8x100g network switches with ventilation grilles
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Arista

Arista DCS-7280SR3MK-48YC8A-S-R | 7280R3 48-Port 25G Switch, 8x 100G, MACsec

DCS-7280SR3MK-48YC8A-S-R

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Description

The Arista DCS-7280SR3MK-48YC8A-S-R is a high-performance 1RU data center switch router designed for cloud, content delivery, and enterprise leaf-spine architectures. Featuring 48x 25GbE SFP ports and 8x 100GbE QSFP uplinks with line-rate AES-256-GCM MACsec encryption, this switch delivers 2 Tbps throughput with 8GB deep packet buffers. The large routing table supports over 2 million IPv4 routes, making it ideal for internet peering, data center interconnect, and advanced EVPN/VXLAN deployments requiring secure, lossless forwarding.

Features

Line-rate AES-256-GCM MACsec encryption up to 2 Tbps
- 8GB dynamic deep buffer with Virtual Output Queuing (VOQ) for lossless forwarding
- FlexRoute engine with internet-scale routing (2M+ IPv4 routes)
- Secure Boot enabled for enhanced security posture
- VXLAN hardware VTEP with EVPN control plane
- MPLS and Segment Routing (SR-TE, RSVP-TE, LDP) support
- Advanced carrier-grade features: PTP IEEE 1588, SyncE, E-OAM
- Algorithmic ACLs for high-scale access control and policy enforcement
- LANZ (Latency Analyzer) for real-time microburst detection
- DANZ (Data Analyzer) for advanced flow telemetry
- Hot-swappable redundant power supplies and fan modules
- Zero-Touch Provisioning (ZTP) for automated deployment
- CloudVision integration for network-wide visibility and automation
- Accelerated sFlow sampling at line rate on all interfaces
- Multi-Chassis Link Aggregation (MLAG) for active-active redundancy
- Comprehensive QoS with flexible classification and hierarchical queuing
- uRPF, CoPP, AAA, and 802.1X security features
- Standards-based interoperability with multi-vendor networks

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

48x 25GbE SFP ports (supports 1G/10G/25G)
- 8x 100GbE QSFP ports (supports 40G/100G with breakout to 10G/25G/50G)
- Total throughput: 2 Tbps full-duplex (4 Tbps bidirectional)
- Forwarding rate: 1 billion packets per second
- Packet buffer: 8GB deep buffer memory
- System memory: 64GB DRAM
- Flash storage: 8GB
- CPU: Eight-core x86 processor
- IPv4 routing scale: Over 2 million routes (L3 profile)
- MAC address table: Up to 384K entries
- Line-rate MACsec AES-256-GCM encryption on all ports
- Latency: From 3.8 microseconds
- Management: CLI, REST API, SNMP, web GUI, CloudVision integration
- Form factor: 1RU rack-mountable
- Airflow: Rear-to-front (reverse airflow)
- Power supplies: Dual hot-swappable 1000W AC (redundant)
- Operating temperature: 0°C to 45°C
- Runs Arista EOS (Extensible Operating System)
- Secure Boot enabled

FAQs

Q: What is the MACsec capability of this switch?
A: The DCS-7280SR3MK-48YC8A-S-R provides line-rate AES-256-GCM MACsec encryption across all 48x 25G and 8x 100G ports, enabling wire-speed secure connectivity at mixed speeds from 1G to 100G without performance degradation, ideal for securing data center interconnects and sensitive traffic.

Q: What routing scale does this model support?
A: This is a large route table variant (K series) supporting over 2 million IPv4 routes with flexible forwarding profiles. The L3-Host-XL profile is supported on the 7280SR3MK-48YC8A models, making it suitable for internet peering, service provider edge, and large-scale cloud routing applications.

Q: Can the 100G QSFP ports be broken out?
A: Yes, the 8x 100GbE QSFP ports support flexible breakout configurations including 4x25G, 4x10G, 2x50G, and 1x40G modes, providing deployment flexibility for mixed-speed environments and enabling up to 80 total 25GbE ports when combined with the native SFP ports.

Q: What protocols and features does Arista EOS support?
A: Arista EOS provides comprehensive Layer 2/3 features including VXLAN, EVPN, MLAG, BGP, OSPF, MPLS, Segment Routing, IPsec, VXLANsec, LANZ microburst detection, Zero-Touch Provisioning, advanced ACLs, PTP/SyncE timing, and full integration with CloudVision for network-wide automation and telemetry.

Q: What is the difference between the -R and -F suffix models?
A: The -R suffix indicates rear-to-front airflow (fan side to port side), while -F models have front-to-rear airflow. The airflow direction must match your data center hot-aisle/cold-aisle design. This model uses redundant hot-swappable 1000W AC power supplies with reverse airflow configuration.

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