Arista 7280R3 (7280DR3-24) 24x400GbE Deep-Buffer Spine Switch
Lossless 400G spine with deep VOQ buffers for incast
We help you choose, configure, and deliver the right system — no obligation.
Configuration at a Glance
Tailored per engagement. Full technical overview below.
Overview
The Arista 7280R3 (7280DR3-24) is a 1U fixed switch providing 24 wire-speed 400GbE QSFP-DD ports with deep dynamic buffering for lossless spine, IP storage, and data center interconnect roles. Every system is configured to the specified EOS release, tested across all ports, and delivered through authorized Arista distribution with full manufacturer warranty.
Who This Solution Is For
Business Benefits
Lossless under incast
Deep VOQ buffering absorbs microbursts and eliminates head-of-line blocking in congested spine and storage paths.
Internet-scale tables
Large routing and forwarding tables support full peering and multi-tenant cloud topologies without table exhaustion.
Investment protection
Flexible 100G and 400G port speeds let the same chassis serve evolving leaf-spine and DCI designs.
Typical Business Use Cases
Lossless 400G data center spine
IP storage and data-analytics fabrics
Data center interconnect and peering
High-incast aggregation tiers
Industry Applications
Technical Overview
The 7280DR3-24 uses Arista's deep-buffer virtual output queue (VOQ) architecture built on Broadcom Jericho2-class silicon, with dynamic buffering scaling into the multi-gigabyte range to virtually eliminate drops during incast. An advanced traffic scheduler enforces weighted-fair and strict-priority queuing while delivering wire-speed L2/L3 forwarding and optional line-rate MACsec encryption.
| Switch Ports | 24 x 400GbE QSFP-DD (flexible to 100G/200G) |
| Throughput | 9.6 Tbps wire-speed |
| Architecture | Deep-buffer VOQ, Broadcom Jericho2-class silicon |
| Packet Buffer | Dynamic deep buffer (multi-GB) for lossless incast |
| Encryption | Optional wire-speed MACsec (R3M variants) |
| Form Factor | 1RU fixed, reversible airflow |
| Operating System | Arista EOS with CloudVision and streaming telemetry |
| Warranty | Arista limited hardware warranty via authorized channel |
Specifications are indicative and configured to each engagement. Request a quote for a configuration tailored to your requirements.
Warranty, Support & Fulfillment
Every system ships from an authorized channel, configured and tested, with the documentation enterprise buyers need — backed by warranty and a dedicated account team.
Enterprise Warranty
Full manufacturer warranty with optional on-site, next-business-day support and extended coverage.
Authorized Channel
Sourced through Tier-1 distribution and OEM partners — never grey market. Asset & warranty records included.
Lead Time & Deployment
48-hour quotes, then configured, burn-in tested, and delivered on a committed schedule.
Nationwide Fulfillment
Coordinated logistics, rack-and-stack, and delivery wherever your infrastructure lives.
Frequently Asked Questions
Why choose the 7280R3 over a shallow-buffer switch for my spine?
Its deep VOQ buffers absorb incast bursts common in storage and analytics traffic, preventing the packet loss and retransmits that shallow-buffer leaf switches suffer under congestion.
Does the 7280DR3-24 support data center interconnect?
Yes; large routing tables, deep buffers, and optional MACsec make it well suited to DCI and internet peering in addition to in-fabric spine duty.
Can these 400G ports run at 100G for a phased migration?
The QSFP-DD ports support flexible speeds down to 100G and 200G, so you can deploy at 100G today and step up to 400G as optics and endpoints are upgraded.
Hardware Assistance
Configure the Arista 7280R3 (7280DR3-24) 24x400GbE Deep-Buffer Spine Switch with Nexus Compute
Tell us your requirements and a hardware specialist will help you specify, configure, and quote the right system — typically within two business days. No obligation.