• Gray metal arista dcs-7280dr3a-36-dc-f 36-port 400g network switch with indicator lights and 16gb buffer shown from front
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Arista

Arista DCS-7280DR3AK-36-F | 7280R3A 36-Port 400G Switch, 14.4Tbps, 2RU

DCS-7280DR3AK-36-F

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Description

The Arista DCS-7280DR3AK-36-F is a high-performance 2RU data center switch router with 36 ports of 400GbE QSFP-DD connectivity, delivering 14.4 Tbps of non-blocking switching capacity. Part of the 7280R3A Series, this switch features large-scale routing capabilities with FlexRoute scaling to over 5 million routes, TunnelSec line-rate AES-256 encryption, and deep packet buffering for lossless forwarding. Designed for modern data centers, cloud providers, and service provider networks, it provides front-to-rear airflow and supports dual AC power supplies for high availability.

Features

Non-blocking Layer 2 and Layer 3 switching with wire-speed forwarding
- FlexRoute engine with flexible forwarding profiles for diverse network roles
- TunnelSec: Line-rate strong encryption supporting MACsec, IPsec, and VXLANsec
- Deep packet buffering with dynamic allocation for burst absorption
- Advanced routing protocols: BGP, OSPF, ISIS, VXLAN, EVPN, MPLS, Segment Routing
- Multi-Chassis Link Aggregation (MLAG) for active-active L2 topologies
- Equal Cost Multi-Path (ECMP) and Unequal Cost Multi-Path (UCMP) routing
- Inband Network Telemetry (INT) for real-time per-flow monitoring and latency tracking
- Accelerated sFlow with hardware-based sampling at full line rate
- Algorithmic ACLs for high-scale access control and policy-based forwarding
- Precision Time Protocol (PTP) and Synchronous Ethernet (SyncE) support
- Network virtualization with VXLAN, EVPN-VXLAN, and EVPN-MPLS Gateway
- QoS with flexible classification, hierarchical scheduling, and ingress policing
- Hot-swappable power supplies and fan modules for field serviceability
- Arista EOS with in-service software upgrades (ISSU) and self-healing resiliency
- Open programmability with Python, Linux shell access, and REST API

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

36x 400GbE QSFP-DD ports supporting 400G/200G/100G speeds
- Switching capacity: 14.4 Tbps
- Forwarding rate: Up to 5.4 billion packets per second
- Deep packet buffers for lossless forwarding with dynamic buffering
- Large-scale routing: FlexRoute engine supporting over 5 million IPv4/IPv6 routes
- Security: Line-rate TunnelSec with AES-256-GCM encryption, MACsec, IPsec, VXLANsec
- CPU: Eight-core processor with 64GB system memory
- Form factor: 2RU rackmount (48.3 x 8.8 x 61.2 cm)
- Weight: 24.1 kg
- Airflow: Front-to-rear (port side to fan side)
- Power: Dual hot-swappable AC power supplies (2400W, sold separately)
- Operating temperature: 0°C to 40°C
- Management: Arista EOS with CLI, SNMP, REST API, NetDB
- Advanced features: Algorithmic ACLs, Inband Network Telemetry (INT), Accelerated sFlow, IPFIX

FAQs

Q: What are the key use cases for the DCS-7280DR3AK-36-F?
A: This switch is ideal for high-performance data center spine and leaf architectures, internet peering with large route tables, cloud service provider networks, data center interconnect (DCI) with encryption, high-bandwidth storage networks, and content delivery networks (CDNs) requiring 400G connectivity and deep buffers.

Q: What does the 'K' variant designation mean in the 7280R3AK model?
A: The 'K' designation indicates this is the highest-tier variant with large-scale routing resources (FlexRoute supporting 5M+ routes), TunnelSec strong encryption capabilities with MACsec/IPsec/VXLANsec, and Algorithmic ACLs for advanced policy-based forwarding and network telemetry.

Q: Does this model include power supplies?
A: No, the -F suffix indicates configurable fans and power supplies that must be ordered separately. The switch supports dual hot-swappable 2400W AC or DC power supplies (PWR-2411-AC-RED or PWR-2411-DC-RED). The front-to-rear airflow requires matching -RED power supplies and fan modules.

Q: What optics and cables are compatible with the QSFP-DD ports?
A: The 36 QSFP-DD ports support a wide range of pluggable optics from 10G to 400G, including QSFP-DD 400G modules, breakout configurations, QSFP28 100G modules, and direct attach cables (DAC). Ports can be configured for 400G, 200G (8x25G lanes), 100G, or lower speeds for maximum deployment flexibility.

Q: Is this switch compatible with existing Arista EOS deployments?
A: Yes, the DCS-7280DR3AK-36-F runs Arista EOS, the same modular network operating system used across the entire Arista portfolio. This ensures consistent management, automation, and feature parity with other Arista switches, enabling seamless integration into existing Arista data center fabrics with MLAG, EVPN-VXLAN, and MPLS support.

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