• Stack of four silver arista dcs-7280sr3k-48yc8a-flx-r network switches with 48 ports 25g and 8x 100g qsfp28
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Arista

Arista DCS-7280SR3K-48YC8A-FLX-R | 7280R3 48-Port 25G Switch, 8x 100G QSFP28

DCS-7280SR3K-48YC8A-FLX-R

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Description

The Arista DCS-7280SR3K-48YC8A-FLX-R is a high-performance 1RU data center switch router designed for cloud, service provider, and enterprise data center leaf-spine architectures. Featuring 48 ports of 25GbE SFP28 and 8 ports of 100GbE QSFP28, it delivers 2 Tbps non-blocking throughput with carrier-grade routing scale. The FLX license enables full routing up to 2M routes with advanced MPLS, EVPN, VXLAN, and Segment Routing capabilities, while the K variant provides 64GB DRAM and 120GB SSD for FlexRoute support exceeding 5 million IPv4 routes. The A suffix delivers an eight-core x86 CPU for enhanced control plane processing and automation.

Features

48x 25GbE SFP28 ports with 1G/10G/25G multi-rate support
- 8x 100GbE QSFP28 ports with 40G/100G and breakout to 4x10G/25G
- 2 Tbps non-blocking switching capacity with wire-speed Layer 2/3 forwarding
- FlexRoute support for 5M+ IPv4 routes with 64GB DRAM and 120GB SSD
- Eight-core x86 CPU for enhanced control plane and automation
- FLX license: Full routing to 2M routes, >24K ACL entries, advanced MPLS LER/LSR
- Layer 3 routing: BGP, OSPF, IS-IS, PIM, 512-way ECMP, VRF, VARP, VRRP
- Advanced MPLS: LDP, RSVP-TE with FRR, BGP-LU, IP-VPN, VPLS
- Segment Routing: SR-TE, TI-LFA for sub-50ms convergence
- Network virtualization: EVPN, VXLAN, VRF-lite, multi-tenancy
- Deep buffering for lossless forwarding and burst absorption
- Advanced QoS: 8 priority queues, WRED, traffic shaping, policing
- Security: MACsec, 802.1X, dynamic ARP inspection, DHCP snooping
- Precision timing: IEEE 1588 PTP, SyncE for timing-sensitive applications
- Telemetry and automation: ZTP, LANZ, DANZ, REST API, gNMI, gRPC
- CloudVision integration for network-wide visibility and orchestration
- Dual redundant hot-swappable AC power supplies with N+1 fan redundancy
- Rear-to-front airflow for hot-aisle/cold-aisle data center designs

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 SFP28 ports (1G/10G/25G capable)
- 8x 100GbE QSFP28 ports (40G/100G capable, supports 4x10G/25G breakout)
- Switching capacity: 2.0 Tbps full-duplex
- Forwarding rate: 1 Bpps (1 billion packets per second)
- Memory: 64GB DRAM, 120GB SSD
- CPU: Eight-core x86 processor
- Routing table: FlexRoute up to 5M+ IPv4 routes
- Layer 2/3 switching with advanced MPLS, Segment Routing, EVPN, VXLAN
- Form factor: 1RU rack-mountable
- Airflow: Rear-to-front (port side intake)
- Power: Dual redundant AC power supplies (155W typical / 325W maximum per PSU)
- Dimensions: 1.75" H x 17.3" W x 18.4" D
- Weight: Approximately 20-26 lbs (depending on configuration)
- Management: CLI, web GUI, REST API, SNMP, NetConf, CloudVision
- Operating system: Arista EOS

FAQs

Q: What is the difference between the FLX license and standard licensing?
A: The FLX license provides full routing up to 2 million routes with advanced features including EVPN, VXLAN, Segment Routing, and advanced MPLS LER/LSR with traffic engineering and link/node protection. This makes it ideal for service provider and large-scale enterprise deployments requiring carrier-grade routing capabilities.

Q: What deployment scenarios is this switch best suited for?
A: The DCS-7280SR3K-48YC8A-FLX-R is ideal for data center leaf-spine architectures, cloud provider networks, service provider edge and aggregation layers, and high-performance computing environments. The 25G server connectivity combined with 100G uplinks and massive routing scale makes it perfect for modern data center fabrics requiring east-west traffic optimization.

Q: What does the K variant designation indicate?
A: The K variant provides enhanced hardware resources including 64GB DRAM and 120GB SSD, enabling FlexRoute support for over 5 million IPv4 routes. This makes it suitable for internet-scale routing tables and large service provider deployments requiring expanded routing capacity beyond standard platforms.

Q: Can this switch be used in spine-and-leaf fabric designs?
A: Yes, the DCS-7280SR3K-48YC8A-FLX-R is specifically designed for modern leaf-spine data center architectures. It excels as a leaf switch providing high-density 25G server connectivity with 100G uplinks to spine switches, supporting full Layer 3 ECMP routing, EVPN, and VXLAN overlay networks.

Q: What is the significance of the rear-to-front airflow designation?
A: The -R suffix indicates rear-to-front (port-side intake) airflow, where cool air enters through the port side and exhausts from the non-port side. This airflow direction must match your data center hot-aisle/cold-aisle design. For front-to-rear airflow, the -F variant is available.

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