• 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-7280DR3A-36-F | 7280R3A 36-Port 400G QSFP-DD Switch, 14.4Tbps

DCS-7280DR3A-36-F

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Description

The Arista DCS-7280DR3A-36-F is a high-performance data center switch router engineered for hyperscale environments and service providers. Featuring 36 ports of 400GbE QSFP-DD connectivity with 14.4 Tbps switching capacity and 16 GB packet buffers, this 2RU platform delivers wire-speed Layer 2 and Layer 3 forwarding for demanding spine and leaf topologies. Equipped with dual AC power supplies, front-to-rear airflow, and precision timing support, it provides a scalable foundation for cloud networking, VXLAN overlays, and internet peering.

Features

Arista EOS (Extensible Operating System) with modular architecture and state-sharing for in-service software upgrades
- FlexRoute engine with algorithmic forwarding table management supporting flexible L2/L3 deployment profiles
- Layer 2: VLAN (4094), Spanning Tree (MSTP/RSTP/PVSTP), MLAG, LACP, LLDP, and jumbo frames (9214 bytes)
- Layer 3: BGP, OSPF, IS-IS, ECMP, VRF-lite, PIM, IGMP, static routing, and policy-based routing
- Network virtualization: VXLAN, EVPN, Segment Routing, MPLS LDP/RSVP-TE, and VRF-aware VXLAN
- Accelerated sFlow for wire-speed network telemetry with 1:500 sampling rates and IPFIX support
- Inband Network Telemetry (INT) for per-flow monitoring of latency, congestion, drops, and path visibility
- Algorithmic ACLs for flexible, scalable access control, policy-based forwarding, and deep packet inspection
- Quality of Service: 8 hardware queues per port, WRED, ECN, DSCP/CoS marking, traffic shaping, and DCTCP
- Zero Touch Provisioning (ZTP) and full automation via REST API, gRPC, OpenConfig, and Ansible integration
- CloudVision integration for centralized network monitoring, analytics, and workflow automation
- Comprehensive standards support: IEEE 802.1Q, 802.1p, 802.1ab (LLDP), 802.3ad (LACP), 802.1D/w/s, RFC 2328/5340 (OSPF), RFC 4271 (BGP), and more

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

36 x 400GbE QSFP-DD ports supporting flexible 10G/25G/40G/50G/100G/200G/400G connectivity with industry-standard optics
- 14.4 Tbps (28.8 Tbps full-duplex) switching capacity with 5.4 billion packets per second forwarding rate
- 16 GB deep packet buffer memory for superior burst absorption and lossless performance
- Eight-core x86 CPU with 64 GB system memory and SSD storage
- 2 x OSFP-LS ports for high-density 400G-ZR DWDM deployment
- 2 x hot-swappable AC power supplies (2400W) with front-to-rear airflow
- Precision timing: IEEE 1588 PTP, Synchronous Ethernet (SyncE) with OCXO and PPS/10M/ToD inputs
- Latency from 3.8 microseconds
- Dimensions: 48.3 x 8.8 x 61.2 cm (19 x 3.50 x 24.1 inches), 2RU form factor
- Weight: 24.1 kg (53.1 lbs)
- Management: Arista EOS with CLI, web GUI, SNMP, REST API, and CloudVision integration
- Operating temperature: 0°C to 40°C; Humidity: 5% to 90% non-condensing

FAQs

Q: What deployment scenarios is the DCS-7280DR3A-36-F optimized for?
A: This switch is designed for hyperscale data center spine and leaf architectures, service provider edge and peering networks, AI/ML fabric deployments requiring ultra-low latency and high throughput, content delivery networks (CDNs), and secure data center interconnect (DCI) applications. It excels in environments requiring wire-speed 400G connectivity with deep buffers for lossless performance.

Q: Does this model support advanced encryption features?
A: The DCS-7280DR3A-36-F is the base 7280R3A model and does not include built-in MACsec or TunnelSec encryption. For encryption capabilities, consider the 7280DR3AM-36 (with MACsec) or 7280DR3AK-36 (with large-scale routing and MACsec/TunnelSec) variants.

Q: What routing scale does this switch support?
A: The DCS-7280DR3A-36-F features Arista's FlexRoute engine with support for full internet routing tables and over 1.4 million IP routes with flexible forwarding profiles. It supports BGP, OSPF, IS-IS, VXLAN-EVPN, MPLS, and Segment Routing for both enterprise and carrier-class deployments.

Q: Is this switch compatible with existing 100G infrastructure?
A: Yes, the QSFP-DD ports are backward compatible with 100G QSFP28 and 40G QSFP+ optics and support breakout configurations for 4x100G, 8x50G, or multiple lower-speed connections per port, enabling seamless migration from 100G to 400G networks.

Q: What redundancy and high availability features are included?
A: The switch includes dual hot-swappable AC power supplies, redundant hot-swappable fan modules, Multi-Chassis Link Aggregation (MLAG) for hitless failover, Virtual Router Redundancy Protocol (VRRP), and support for ECMP routing. Arista EOS also provides in-service software upgrades (ISSU) and self-healing resiliency.

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