• Stack of four silver-colored arista dcs-7280sr3k-48yc8a-flx-f 48-port 25g network switches with multiple ports and ventilation grilles
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Arista

Arista DCS-7280SR3K-48YC8A-FLX-F | 7280R3 48-Port 25G Switch, 8x 100G, 2Tbps, FLX

DCS-7280SR3K-48YC8A-FLX-F

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Description

The Arista DCS-7280SR3K-48YC8A-FLX-F is a high-performance 1RU data center switch router delivering 2 Tbps of non-blocking throughput with 48 x 25G SFP28 ports and 8 x 100G QSFP28 uplinks. Featuring the FLX software license for full routing up to 2M routes with advanced MPLS, EVPN, VXLAN, and Segment Routing capabilities, this K-variant platform includes 64GB DRAM and 120GB SSD for internet-scale routing. The A-suffix denotes an eight-core x86 CPU for enhanced control plane processing, while the F-suffix provides front-to-rear airflow for hot-aisle/cold-aisle data center deployments.

Features

48 x 25GbE SFP28 ports supporting 1G/10G/25G speeds
- 8 x 100GbE QSFP28 ports supporting 40G/100G with breakout capability
- 2 Tbps non-blocking full-duplex switching capacity with 1 Bpps forwarding rate
- Virtual Output Queue (VOQ) architecture eliminates head-of-line blocking
- 4GB HBM2 dynamic deep packet buffer for lossless forwarding
- FlexRoute engine with up to 5 million IPv4 routes and flexible forwarding profiles
- Advanced Layer 3 protocols: BGP, MP-BGP, OSPF, OSPFv3, IS-IS, BFD
- MPLS Label Edge Router (LER) and Label Switch Router (LSR) with traffic engineering
- Segment Routing (SR) for simplified traffic steering and network slicing
- EVPN with IRB (Integrated Routing and Bridging) for overlay networks
- VXLAN routing with 512-way ECMP for scalable Layer 2 overlay
- VRF-lite with multi-tenancy support for network segmentation
- Algorithmic ACLs with >24K entries for high-scale access control and policy-based forwarding
- IEEE 1588v2 PTP (Precision Time Protocol) with hardware timestamping and Synchronous Ethernet (SyncE)
- Advanced telemetry: LANZ, Accelerated sFlow at line rate, DANZ, INT, IPFIX, gNMI streaming
- MLAG (Multi-Chassis Link Aggregation) for high availability
- Spanning Tree: RSTP, MSTP, RPVST+ with rapid convergence
- MACsec and TunnelSec support for encryption (model-dependent)
- CloudVision integration for centralized management, automation, and telemetry
- Zero-Touch Provisioning (ZTP) for automated deployment
- Hot-swappable redundant power supplies and N+1 fan modules
- Eight-core x86 CPU for demanding control plane workloads
- 64GB DRAM and 120GB SSD for enhanced platform resources
- Front-to-rear airflow for hot-aisle/cold-aisle 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

Port Configuration: 48 x 1/10/25G SFP28 ports, 8 x 40/100G QSFP28 ports (breakout to 4x10G or 4x25G supported)
- Switching Capacity: 2.0 Tbps full-duplex, non-blocking
- Forwarding Rate: 1 Bpps (1 billion packets per second)
- System Buffer: 4GB packet buffer with Virtual Output Queue (VOQ) architecture
- Memory & Storage: 64GB DRAM, 120GB SSD storage
- CPU: Eight-core x86 control plane processor (A-variant)
- Latency: From 3.8 microseconds (store-and-forward)
- Routing Scale: FlexRoute engine supports up to 5 million IPv4 routes (K-variant with FLX license)
- Maximum VLANs: 4,096 VLAN IDs with Q-in-Q (802.1ad) support
- Link Aggregation: Up to 256 ports per LAG, 2,048 LAG groups, MLAG support for 512 ports per group
- Jumbo Frames: MTU up to 9,214 bytes
- Management: CLI, Web GUI, SNMP, NETCONF, RESTCONF, gNMI, CloudVision, Zero-Touch Provisioning (ZTP)
- Form Factor: 1RU, 1.75" H x 17.4" W x 20.7" D
- Weight: Approximately 22-26 lbs (10-12 kg)
- Power: Dual hot-swappable AC PSUs (PWR-511-AC), typical 155W / max 325W
- Airflow: Front-to-rear (port side exhaust)
- Redundancy: N+1 hot-swappable fans, 1+1 redundant power supplies

FAQs

Q: What does the FLX license include?
A: The FLX license provides full routing capabilities up to 2 million routes, advanced ACLs (>24K), EVPN, VXLAN, Segment Routing, advanced MPLS-LER/LSR with traffic engineering, and link/node protection. This is Arista's highest-tier software license for data center and service provider environments.

Q: What is the difference between the SR3K and SR3 variants?
A: The SR3K (K-variant) includes expanded FlexRoute capabilities supporting up to 5 million IPv4 routes, 64GB DRAM, and 120GB SSD storage, making it suitable for internet-scale routing and service provider deployments. Standard SR3 models have lower routing scale and memory.

Q: What does the A suffix indicate?
A: The A suffix denotes an eight-core x86 CPU for enhanced control plane processing, enabling demanding routing protocols at scale, intensive automation scripting, gNMI streaming telemetry, and advanced network analytics. This is ideal for large-scale BGP convergence and CPU-driven operations.

Q: Can this switch be used as a spine or leaf?
A: Yes, the 7280SR3K-48YC8A is designed as a universal leaf/spine switch. It's commonly deployed as a high-density 25G leaf switch with 100G uplinks in modern data center fabrics, but can also serve spine roles with its deep buffer architecture, internet-scale routing, and low-latency forwarding.

Q: What operating system does this switch run?
A: The switch runs Arista EOS (Extensible Operating System), a modular Linux-based network OS with state-sharing architecture. EOS provides unified management across Arista platforms with support for automation, telemetry, CloudVision integration, Python scripting, and in-service software upgrades.

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