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

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

DCS-7280SR3K-48YC8A-R

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Description

The Arista DCS-7280SR3K-48YC8A-R is a high-performance data center switch designed for cloud, service provider, and enterprise environments. This 1RU Layer 3 switch delivers 2 Tbps of throughput with 48 ports of 1/10/25GbE SFP28 and 8 ports of 100GbE QSFP28, ideal for modern leaf-spine architectures. The K-variant provides FlexRoute support for over 5 million IPv4 routes with 64GB RAM and 120GB SSD, while the A-variant features an eight-core x86 CPU for enhanced control plane processing, making it perfect for large-scale routing deployments and advanced automation workloads.

Features

High-density 25G/100G switching with 2 Tbps throughput and ultra-low latency from 3.8 microseconds
- FlexRoute K-variant with support for over 5 million IPv4 routes, 64GB RAM, and 120GB SSD for internet-scale routing
- Eight-core x86 CPU (A-variant) for enhanced control plane processing, telemetry, and automation workflows
- 4GB packet buffer for deep buffering and lossless forwarding in congestion scenarios
- Advanced Layer 2 features: IEEE 802.1Q VLAN, MLAG, LACP, STP/RSTP/MSTP, LLDP, and VXLAN
- Comprehensive Layer 3 routing: BGP, OSPF, IS-IS, EIGRP, PIM, IGMP, static routing with 512-way ECMP
- Carrier-grade MPLS support: LDP, RSVP-TE with FRR, Segment Routing, SR-TE, TI-LFA, BGP-LU, and IP-VPN
- Network virtualization: EVPN, EVPN-VXLAN, EVPN-MPLS, VRF, VARP, and VMware NSX integration
- Advanced security: MACsec encryption, IPv4/IPv6 ACLs, BGP FlowSpec, BGP-RPKI, and uRPF
- Precision timing: IEEE 1588v2 PTP for sub-microsecond accuracy and SyncE support
- Programmable forwarding and telemetry with Arista EOS automation framework
- CloudVision integration for centralized network-wide management, telemetry, and intent-based networking
- Hot-swappable dual redundant power supplies and N+1 fan modules for high availability
- Rear-to-front airflow for compatibility with hot-aisle/cold-aisle data center designs
- Zero Touch Provisioning (ZTP) and Zero Touch Replacement (ZTR) for simplified deployment
- Extensive optics support: 1G/10G/25G SFP28 and 40G/100G QSFP28 with breakout capability

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

48 x 1/10/25GbE SFP28 ports
- 8 x 100GbE QSFP28 ports (40G/100G capable)
- Switching capacity: 2 Tbps (4 Tbps full duplex)
- Packet forwarding rate: Up to 1 Bpps
- System memory: 64GB DRAM (K-variant FlexRoute)
- Storage: 120GB SSD
- Packet buffer: 4GB
- CPU: Eight-core x86 processor (A-variant)
- Latency: From 3.8 microseconds
- Routing table scale: Over 5 million IPv4 routes
- Form factor: 1RU rack-mountable
- Dimensions: 1.75" H x 17.4" W x 20.7" D
- Weight: Approximately 22-26 lbs (10-12 kg)
- Power consumption: 155W typical / 325W maximum
- Airflow: Rear to front (port to fan side)
- Power supplies: Dual hot-swappable AC PSU (PWR-511-AC)
- Operating system: Arista EOS (Extensible Operating System)
- Management: CLI, Web UI, SNMP, CloudVision, REST API

FAQs

Q: What deployment scenarios is the DCS-7280SR3K-48YC8A-R best suited for?
A: This switch is ideal for data center leaf-spine architectures, service provider edge networks, and cloud deployments requiring high-density 25G access with 100G uplinks. The K-variant with FlexRoute makes it particularly suitable for internet peering and large-scale routing applications requiring 5M+ IPv4 routes.

Q: What does the K and A designation mean in this model?
A: The K-variant indicates FlexRoute support with expanded routing tables (over 5 million IPv4 routes), 64GB DRAM, and 120GB SSD for large-scale routing. The A-variant features an eight-core x86 CPU for enhanced control plane processing, enabling demanding automation, telemetry, and routing protocol operations.

Q: What is the difference between the -R and -F suffix models?
A: The -R suffix denotes rear-to-front airflow where air flows from the fan side to the port side. The -F suffix indicates front-to-rear airflow. The airflow direction must match your data center hot-aisle/cold-aisle cooling design. All other specifications and features are identical.

Q: Does this switch support QSFP28 port breakout?
A: Yes, the 8 x 100GbE QSFP28 ports support breakout configurations to 4 x 10G or 4 x 25G, enabling up to 80 logical ports. This provides flexible connectivity options for mixed-speed deployments.

Q: What Layer 3 routing protocols are supported?
A: The switch supports comprehensive Layer 3 routing including BGP, OSPF, IS-IS, EIGRP, static routing, and multicast protocols. Advanced features include MPLS, Segment Routing, EVPN, VXLAN, 512-way ECMP, and carrier-grade features like BGP FlowSpec and PIC convergence for sub-50ms recovery.

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