• Gray and black Arista DCS-7280DR3-24 network switch with multiple QSFP-DD 400G ports and sleek rectangular design
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Arista

Arista DCS-7280DR3K-24-F | 7280R3 24-Port 400G QSFP-DD Switch, 9.6Tbps, 16GB Buffer

DCS-7280DR3K-24-F

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Description

The Arista DCS-7280DR3K-24-F is a high-performance 1RU data center switch router delivering 24 ports of 400GbE QSFP-DD connectivity with 9.6Tbps throughput and 16GB deep buffer. Designed for spine, leaf, and DCI applications, it features large-scale routing tables supporting up to 5M routes, advanced Layer 3 capabilities including VXLAN and EVPN, and dynamic deep buffering for lossless forwarding. The front-to-rear airflow design and dual redundant 1500W AC power supplies ensure reliable operation in demanding cloud and service provider environments.

Features

24x 400GbE QSFP-DD ports with flexible breakout to 100G/50G/200G
- FlexRoute Engine supporting up to 5M routes for internet-scale routing
- 16GB dynamic deep buffer with Virtual Output Queue (VOQ) architecture for lossless forwarding
- Comprehensive Layer 2 and Layer 3 forwarding with wire-speed performance
- VXLAN overlay networking with hardware VTEP support
- EVPN control plane for multi-tenancy and network virtualization
- Algorithmic ACLs for high-scale access control and policy-based forwarding
- Accelerated sFlow and IPFIX for embedded network telemetry and monitoring
- Modular Database (MDB) with flexible forwarding profiles (Balanced, L3 optimized, Internet Peering)
- ECMP and MLAG support for high availability and scalable leaf-spine designs
- Segment Routing and MPLS LER/LSR with traffic engineering
- Hot-swappable redundant power supplies and fans
- Arista EOS operating system with zero touch provisioning and CloudVision management
- Sub-microsecond latency for real-time applications
- Standards-based IEEE 802.1Q, 802.1Qbg, LLDP, PTP, and SyncE support

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

24x 400GbE QSFP-DD ports (support 4x100G, 4x50G, 2x200G breakouts)
- Switching capacity: 9.6Tbps full-duplex
- Forwarding rate: 4 Bpps (billion packets per second)
- System buffer: 16GB dynamic deep buffer with VOQ architecture
- MAC address table: 736,000 entries (R3K Balanced profile)
- IPv4 LPM routes: up to 1.3M (L3 profile) or 5M routes with FlexRoute Engine
- Latency: 3.8µs (typical)
- Management: CLI, Web GUI, SNMP, REST API, CloudVision Portal
- Power supply: Dual redundant 1500W AC (PWR-1511-AC-RED)
- Airflow: Front-to-rear (port side to fan side)
- Power consumption: 560W typical / 1110W maximum
- Form factor: 1RU (1.73" H x 17.4" W x 22.5" D)
- Operating temperature: 0°C to 40°C
- Certifications: FCC Class A, CE, NEBS Level 3

FAQs

Q: What routing protocols does the DCS-7280DR3K-24-F support?
A: The switch supports comprehensive Layer 3 routing including BGP, OSPF, ISIS, PIM, VXLAN, EVPN, Segment Routing, and MPLS with advanced LER/LSR capabilities. The R3K model with FlexRoute Engine supports large-scale routing tables up to 5 million routes, making it ideal for internet peering and data center interconnect applications.

Q: Can the 400G ports be broken out to lower speeds?
A: Yes, each 400G QSFP-DD port can be configured for flexible breakout options including 4x100G, 4x50G, or 2x200G using appropriate optics and cables. This allows the switch to support up to 96x100G ports, providing deployment flexibility for mixed-speed environments.

Q: What is the difference between DR3 and DR3K models?
A: The DR3K models feature enhanced routing scale with large route tables supporting up to 5M routes, expanded forwarding profiles, and additional memory resources compared to standard DR3 models. The K-series is optimized for internet peering, DCI, and service provider edge roles requiring massive routing scale.

Q: Does this switch support MACsec encryption?
A: The standard DCS-7280DR3K-24-F does not include MACsec encryption. For wire-speed AES-256-GCM encryption, consider the 7280R3M or 7280R3AM series models which provide IEEE 802.1AE MACsec on all ports at speeds from 1G to 400G.

Q: What licenses are required for full Layer 3 functionality?
A: The R3K series includes base routing features. For full internet-scale routing, EVPN, VXLAN, Segment Routing, and advanced MPLS features, the FLX license (LIC-FIX-2-FLX) is recommended. This license enables over 256K routes and advanced traffic engineering capabilities.

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