Arista 7280R3 32-Port 100GbE QSFP Layer 3 Router with 4x QSFP-DD (Rear-to-Front) — DCS-7280CR3-32D4-R

The Arista DCS-7280CR3-32D4-R is a 7280R3 series 32-port 100GbE QSFP Layer 3 router with 4x QSFP-DD (400GbE) uplinks and rear-to-front (R) airflow. Running Arista EOS with deep buffer architecture, it delivers high-performance 100GbE spine routing with 400GbE uplink capability, MPLS, and segment routing for next-generation data center and WAN edge deployments.

Key Features

• 32x 100GbE QSFP ports for high-density 100GbE spine/aggregation connectivity
• 4x QSFP-DD (400GbE) uplinks for next-generation fabric connectivity
• Rear-to-front (R) airflow — hot aisle/cold aisle data center compatible
• Deep buffer architecture for bursty and storage workloads
• Layer 3 router — full BGP, OSPF, MPLS, and segment routing
• Arista EOS — programmable, automation-ready network OS

Product Specifications

• Part Number: DCS-7280CR3-32D4-R
• Manufacturer: Arista
• OEM Status: Retail
• Model: 7280R3
• QSFP Ports: 32x 100GbE
• Uplink Ports: 4x QSFP-DD (400GbE)
• Airflow: Rear-to-Front (R)
• Switching Layer: Layer 3 (Router)
• OS: Arista EOS
• Form Factor: 1U Rack-mountable

Switch & Port Specifications

• Switching Capacity: Up to 12.8 Tbps
• Buffer: Deep buffer
• MAC Address Table: 128K

Network & Protocol Specifications

• Routing: BGP, OSPF, IS-IS, MPLS, Segment Routing
• VLANs: 802.1Q, up to 4,094
• VXLAN: Supported
• EVPN: Supported
• Telemetry: Arista DANZ streaming telemetry

Use Cases

• Data center spine routing with 100GbE leaf connectivity and 400GbE uplinks
• WAN edge routing with MPLS and segment routing
• Deep buffer spine for bursty and storage-heavy data center fabrics
• Next-generation 400GbE fabric migration with 100GbE backward compatibility

Compatibility

• QSFP28/QSFP100 100GbE optical transceivers and DAC cables
• QSFP-DD 400GbE optical transceivers and DAC cables for uplinks
• Arista EOS management and CloudVision automation ecosystem

Frequently Asked Questions

What is the difference between DCS-7280CR3-32D4-R and DCS-7280CR3-32P4-R?

Both are 7280R3 series 32-port 100GbE switches with 4x 400GbE uplinks. The 32D4 variant uses QSFP-DD uplinks while the 32P4 uses OSFP uplinks — verify your 400GbE transceiver ecosystem before ordering.

What does the -R suffix indicate?

The -R suffix indicates rear-to-front airflow — air enters from the rear and exits from the front. This is suitable for hot aisle containment where the rear faces the hot aisle.

The Arista DCS-7280CR3-32D4-R delivers 32-port 100GbE QSFP Layer 3 routing with 4x 400GbE QSFP-DD uplinks, deep buffer, and rear-to-front airflow — a next-generation data center spine router for 100GbE fabrics with 400GbE uplink capability.