• Stack of four silver arista dcs-7280sr3a-48yc8-r 48-port 50g network switches with multiple ports and ventilation grilles
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Arista

Arista DCS-7280SR3A-48YC8-R | 7280R3A 48-Port 50G Switch, 6x 200G QSFP

DCS-7280SR3A-48YC8-R

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Description

The Arista DCS-7280SR3A-48YC8-R is a high-performance data center switch router delivering 48 ports of 50GbE SFP connectivity and 6 ports of 200G QSFP uplinks with rear-to-front airflow. Built for demanding cloud, spine-leaf, and service provider environments, it offers 3.6 Tbps throughput, deep 4GB packet buffers, and advanced Layer 3 routing with support for internet-scale routing tables. Dual hot-swappable AC power supplies and 1RU design ensure reliable, space-efficient deployment.

Features

48x 50GbE SFP ports with support for 10G/25G/50G transceivers
- Flexible high-speed uplinks: 6x 200G QSFP or 8x 100G QSFP configuration
- 3.6 Tbps wire-speed switching with 4GB deep packet buffer for lossless forwarding
- Advanced Layer 3 routing with FlexRoute engine supporting up to 5M routes (with K variant)
- Arista EOS operating system with CloudVision integration
- Hot-swappable dual 1000W AC/DC redundant power supplies
- Hot-swappable fan modules with rear-to-front airflow
- Comprehensive routing protocols: BGP, OSPF, ISIS, MPLS, Segment Routing
- VXLAN overlay networking with EVPN control plane
- Algorithmic ACLs with 100K+ rule support
- Precision Time Protocol (PTP) and Synchronous Ethernet (SyncE)
- sFlow, DANZ, and advanced telemetry for network visibility
- LANZ (Latency Analyzer) for real-time congestion detection
- Zero Touch Provisioning (ZTP) for automated deployment
- MACsec support on M and K variants for layer 2 encryption
- IEEE 802.1Q VLAN tagging, 802.1D/w/s Spanning Tree
- Quality of Service with 8 hardware queues and scheduling
- IPv4 and IPv6 unicast and multicast routing
- 1RU space-efficient design for high-density deployments

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

Ports: 48x 50GbE SFP ports (supports 10G/25G/50G)
- Uplinks: 4x 200G QSFP + 4x 100G QSFP (6x 200G or 8x 100G max)
- Switching Capacity: 3.6 Tbps (7.2 Tbps full duplex)
- Forwarding Rate: 1.35 billion packets per second
- Packet Buffer: 4GB dynamic deep buffer
- Latency: From 3.8 microseconds
- CPU: Eight-core x86 processor
- Memory: 16GB DRAM
- Storage: 120GB SSD
- Routing: Supports up to 1 million IPv4 routes (standard), up to 5 million with large route table option
- MAC Addresses: Up to 384K
- Power Supply: Dual hot-swappable AC/DC 1000W PSU
- Airflow: Rear-to-front (port-side exhaust)
- Form Factor: 1RU rack-mountable
- Management: CLI, EOS REST API, SNMP, NetConf, gRPC
- Operating Temperature: 0°C to 40°C
- Dimensions: 1.73 x 17.5 x 22.5 inches (H x W x D)
- Standards Compliance: RoHS, CE, FCC, NEBS Level 3

FAQs

Q: What is the difference between the 7280SR3A and the 7280SR3?
A: The 7280SR3A features 48x 50GbE SFP ports (vs 25GbE in the SR3) and supports flexible uplink configurations with up to 6x 200G QSFP or 8x 100G QSFP ports. The R3A generation provides higher bandwidth per port and enhanced routing scale options including TunnelSec encryption capabilities on certain models.

Q: What does the -R suffix mean in the model number?
A: The -R suffix indicates rear-to-front airflow, meaning air flows from the fan side to the port side. This is critical for hot-aisle/cold-aisle data center deployments. The -F variant offers front-to-rear airflow, and the # variant has configurable fans and power supplies.

Q: Can this switch support 400G connectivity?
A: While the 7280SR3A-48YC8 model has QSFP ports that are primarily configured for 100G or 200G operation, the 7280R3A series includes other models with native 400G QSFP-DD support. The 48YC8 variant focuses on 50G access ports with high-speed 100G/200G uplinks.

Q: What routing protocols and features are supported?
A: The switch supports comprehensive Layer 3 routing including BGP, OSPF, ISIS, VRRP, PIM, MPLS, VXLAN, and Segment Routing. It offers internet-scale routing tables, algorithmic ACLs supporting 100K+ rules, deep packet inspection, and advanced telemetry with sFlow and DANZ monitoring.

Q: Is this switch suitable for spine or leaf deployment?
A: Yes, the 7280SR3A-48YC8-R is ideal for both spine and leaf roles in modern data center fabrics. With 48x 50G ports it excels as a high-density leaf switch, while the 200G uplinks provide ample spine connectivity. Deep buffers and low latency make it perfect for lossless Ethernet and storage applications.

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