• This black arista dcs-7280dr3a-54-dc-f server rack shows multiple slots with green-lit 400g qsfp-dd switch components
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Arista

Arista DCS-7280DR3AM-54-DC-F | 7280R3A 54-Port 400G Switch, 21.6Tbps, TunnelSec

DCS-7280DR3AM-54-DC-F

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Description

The Arista DCS-7280DR3AM-54-DC-F is a high-performance 2RU data center switch router delivering 54 ports of 400 Gigabit Ethernet connectivity with 21.6 Tbps switching capacity. Designed for hyperscale data centers, service provider networks, and high-performance computing environments, it features line-rate TunnelSec encryption including MACsec, IPsec, and VXLANsec for secure layer 2 and layer 3 deployments. With deep packet buffers up to 24GB, Virtual Output Queue architecture, and dual DC power supplies, this switch excels in demanding spine, DCI, and internet peering applications.

Features

Non-blocking switching with VOQ architecture eliminating head-of-line blocking
- Line-rate AES-256-GCM encryption at all speeds: MACsec, IPsec, and VXLANsec
- FlexRoute engine for internet-scale routing with hardware support for large route tables
- Deep packet buffers up to 24GB for lossless forwarding and burst absorption
- Accelerated sFlow for high-rate network telemetry and flow sampling at line rate
- Inband Network Telemetry (INT) for real-time per-flow latency and congestion monitoring
- Algorithmic ACLs for flexible high-scale access control and policy-based forwarding
- Comprehensive Layer 2 and Layer 3 protocols: BGP, OSPF, IS-IS, MPLS, Segment Routing
- EVPN-VXLAN for scalable data center overlay and multi-tenancy
- Service provider features: L2/L3 VPNs, VPLS, pseudowires, 6PE/6VPE, mLDP
- Precision timing: IEEE 1588 PTP and Synchronous Ethernet (SyncE)
- MLAG for active-active layer 2 redundancy and 128-way ECMP for layer 3 load balancing
- CloudVision integration for network-wide automation and telemetry
- Zero Touch Provisioning (ZTP) for simplified deployment
- Comprehensive QoS with hierarchical queuing, ingress policing, and flexible rewrite
- NEBS Level 3 compliance for telecom and service provider 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

54x 400GbE QSFP-DD ports supporting 400G, 200G, 100G, 50G, and breakout configurations
- Switching capacity: 21.6 Tbps full-duplex non-blocking
- Forwarding rate: 8.1 billion packets per second
- Packet buffer: Up to 24GB deep buffer with Virtual Output Queue (VOQ) architecture
- Form factor: 2RU rackmount (19 x 3.5 x 25.2 inches / 48.3 x 8.9 x 64 cm)
- Power: Dual DC power supplies (PWR-3001-DC), 933W typical / 1715W maximum
- Airflow: Front-to-rear (-F suffix)
- Encryption: Line-rate AES-256-GCM MACsec, IPsec, and VXLANsec (TunnelSec)
- CPU: Multi-core processor with 64GB system memory
- Management: Arista EOS with CLI, REST API, NetConf, CloudVision, Zero Touch Provisioning
- Routing scale: Large routing tables with FlexRoute engine, scalable forwarding profiles
- Hot-swappable components: Power supplies and fan modules

FAQs

Q: What is TunnelSec and why is it included on this model?
A: TunnelSec is Arista's advanced encryption technology that provides line-rate AES-256-GCM encryption including MACsec for layer 2 links, IPsec for layer 3 tunnels, and VXLANsec for overlay networks. The DCS-7280DR3AM-54-DC-F supports TunnelSec to enable secure connectivity across data center interconnects and WAN links without requiring external encryption appliances, making it ideal for secure multi-site deployments.

Q: Can the 400G ports support lower speed optics and breakout configurations?
A: Yes, the QSFP-DD ports support flexible speed configurations including native 400G, 200G, and 100G operation. Each port can also be broken out into multiple lower-speed interfaces using appropriate cables and optics, such as 2x 200G, 4x 100G, or 8x 50G, providing deployment flexibility for mixed-speed environments and migration paths.

Q: What is the difference between this DC model and the AC-powered version?
A: The -DC-F suffix indicates this model includes dual DC power supplies (PWR-3001-DC) designed for telecom and service provider environments with -48V DC power infrastructure. The AC version (DCS-7280DR3AM-54-F) uses dual AC power supplies. Both models have identical switching performance and feature sets; the difference is solely in the power input type.

Q: Is this switch suitable for internet peering and BGP routing?
A: Yes, the 7280R3A series with FlexRoute engine is specifically designed for internet peering, supporting large routing tables with over 1.4 million routes in hardware. It handles full internet routing tables with advanced BGP features, MPLS, Segment Routing, and comprehensive service provider protocols making it well-suited for peering exchanges and provider edge deployments.

Q: What buffer architecture does this switch use and why does it matter?
A: The DCS-7280DR3AM-54-DC-F uses a Virtual Output Queue (VOQ) architecture with up to 24GB of deep packet buffers. VOQ eliminates head-of-line blocking and provides superior burst absorption compared to shared-memory switches. This architecture is critical for handling TCP incast, bursty traffic patterns, and congestion in high-performance data analytics, storage, and spine applications without packet loss.

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