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

Arista DCS-7280SR3A-48YC8-FLX-R | 7280R3A 48-Port 50G Switch, 8x 100G QSFP

DCS-7280SR3A-48YC8-FLX-R

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Description

The Arista DCS-7280SR3A-48YC8-FLX-R is a high-performance data center switch router designed for demanding enterprise and service provider environments. Featuring 48 ports of 50 Gigabit Ethernet SFP connectivity and 8 ports of 100 Gigabit Ethernet QSFP uplinks, this 1RU switch delivers wire-speed Layer 2 and Layer 3 forwarding with deep packet buffering and support for over 256,000 routes. The rear-to-front airflow design optimizes thermal management in hot aisle/cold aisle deployments, while the included FLX license enables advanced routing features including EVPN, VXLAN, Segment Routing, and base MPLS capabilities for modern data center and cloud networking applications.

Features

Arista EOS operating system with advanced automation and programmability
- FlexRoute engine for scalable Internet routing and large forwarding tables
- EVPN-VXLAN overlay networking for multi-tenant data center fabrics
- Multi-Chassis Link Aggregation (MLAG) for active-active Layer 2 redundancy
- Virtual Output Queuing (VoQ) architecture eliminates head-of-line blocking
- Deep packet buffer (4GB) for burst absorption and lossless operation
- Accelerated sFlow for high-rate network telemetry and traffic analysis
- Inband Network Telemetry (INT) for real-time per-flow visibility
- Algorithmic ACLs for scalable policy-based forwarding and security
- MPLS and Segment Routing for carrier-grade traffic engineering
- IPv6 ready with dual-stack support and extensive IPv6 routing features
- Zero Touch Provisioning (ZTP) for automated deployment
- Precision Time Protocol (PTP) and SyncE for network timing applications
- Flexible forwarding table allocation for MAC, routing, host, and ARP entries
- Modular software architecture with in-service updates and stateful failover
- Comprehensive network visibility with DANZ and multi-port mirroring
- Standards-based 50GbE IEEE 802.3cd support
- Hot-swappable redundant power supplies and fan modules

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 50GbE SFP56 ports (supporting 1G/10G/25G/50G)
- 8x 100GbE QSFP28 ports (supporting 40G/100G with breakout to 10G/25G/50G)
- Switching Capacity: 4.8 Tbps
- Forwarding Rate: 1.8 Bpps
- Packet Buffer: 4GB deep buffer
- Routing Table: Supports over 256K IPv4/IPv6 routes with FLX license
- Form Factor: 1RU rack-mountable
- Airflow: Rear-to-front (reverse airflow)
- Power Supply: Dual redundant hot-swappable AC power supplies
- Management: Arista EOS with CLI, web GUI, SNMP, REST API, NetConf, gRPC
- Layer 2 Features: VLAN, MLAG, LACP, STP/RSTP/MSTP, LLDP
- Layer 3 Features: BGP, OSPF, ISIS, PIM, VRF, VXLAN, EVPN, MPLS, Segment Routing
- Operating Temperature: 0°C to 40°C
- Certifications: NEBS Level 3, UL, CE, FCC

FAQs

Q: What is the difference between the 7280SR3 and 7280SR3A series?
A: The 7280SR3A series features 50GbE SFP56 ports compared to 25GbE on the SR3, providing double the port speed. The SR3A also includes 6-8x 200G QSFP56-DD uplinks on some models versus 100G QSFP28 on the SR3, delivering higher throughput for spine connectivity and future-proofing for bandwidth-intensive applications.

Q: What does the FLX license include on this model?
A: The FLX-Lite license included with this model supports up to 256K IPv4 and IPv6 routes, making it suitable for large-scale routing deployments. It includes full routing protocols (BGP, OSPF, ISIS), EVPN, VXLAN, Segment Routing, and base MPLS LSR functionality without traffic engineering or link/node protection.

Q: What is the significance of rear-to-front airflow (-R suffix)?
A: The rear-to-front airflow design pulls air from the fan/rear side and exhausts through the port/front side. This is typically used in cold aisle/hot aisle data center designs where cold air is at the rear and hot exhaust is at the front, opposite to standard front-to-rear airflow models.

Q: Can this switch support both data center and WAN routing applications?
A: Yes, the 7280SR3A with FLX license is a versatile universal leaf and spine switch router that supports data center fabric architectures with VXLAN/EVPN as well as carrier-grade routing features including MPLS, Segment Routing, and Internet peering with large routing tables, making it suitable for DCI and WAN edge deployments.

Q: What optics are supported on the 50G SFP ports?
A: The 50GbE SFP56 ports support backward compatibility with 1G SFP, 10G SFP+, 25G SFP28, and 50G SFP56 transceivers, providing investment protection and migration flexibility. The 100G QSFP28 uplinks support 40G/100G QSFP modules and can break out to 4x25G or 4x10G for additional connectivity options.

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