The DCS-7280DR3A-36-F is a 2 RU, 36-port 400GbE fixed switch router for high-density 400G spine, core and peering roles. It is part of the Arista 7280R3A Series and delivers 14.4 Tbps (28.8 Tbps full duplex) of throughput at 5.4 Bpps with front-to-rear airflow.
Key Specifications
Ports: 36 x 400GbE QSFP-DD
Maximum density: 36 x 400GbE or 144 x 100GbE (with breakout)
Throughput: 14.4 Tbps (28.8 Tbps full duplex) / 5.4 Bpps
Latency: from 3.8 microseconds
CPU / memory: Eight-core x86, 64 GB system memory
Storage: 480 GB SSD
Packet buffer: 16 GB
Route scale: Standard route scale (a large-route 7280DR3AK-36 version is also offered)
Power draw: 643 W typical / 1283 W maximum
Power supplies: 2 x PWR-2411 (1+1 redundant)
Cooling: 4 x FAN-7012H (N+1 redundant)
Airflow: front-to-rear (port side intake, power supply side exhaust)
Dimensions (WxHxD): 17.3 x 3.46 x 24.09 in (43.99 x 8.79 x 61.18 cm); 2 RU
Weight: 53.1 lbs (24.09 kg)
Deployment Scenarios
400G spine and core: 36 wire-speed 400GbE ports in 2 RU, with 16 GB of packet buffer for bursty east-west and inter-DC traffic
Internet peering and edge: deep buffers and Virtual Output Queues suit transit, peering and DC interconnect
100G aggregation: breaks out to as many as 144 x 100GbE for dense leaf aggregation
Choosing Among the Variants
The 7280R3A family covers 36 and 54 port 400GbE systems (7280DR3A-36, 7280DR3A-54), mixed 100G/400G systems (7280CR3A-24D12, 7280CR3A-48D6, 7280CR3A-32S), a 72-port 100GbE system (7280CR3A-72) and a 50G/200G system (7280SR3A-48YC8). In Arista model names, M adds encryption-capable ports and K adds large route scale (license-gated where encryption is involved); -F is front-to-rear airflow and -R is rear-to-front.
Frequently Asked Questions
What ports does the DCS-7280DR3A-36-F have?
The DCS-7280DR3A-36-F provides 36 x 400GbE QSFP-DD. Maximum density is 36 x 400GbE or 144 x 100GbE (with breakout).
What airflow direction is the DCS-7280DR3A-36-F?
The -F suffix means front-to-rear airflow. Arista lists this model with front-to-rear airflow.
How much power does the DCS-7280DR3A-36-F draw?
Arista lists 643 W typical / 1283 W maximum, with 2 x PWR-2411 (1+1 redundant) power supplies.
BrightStar Systems supplies professionally tested refurbished Arista 7280R3A Series hardware. Every unit is inspected, tested on original-spec firmware, factory reset, and configuration wiped before shipment, and backed by our standard warranty. Request a quote for current availability and pricing. Specifications are from the Arista 7280R3A Series data sheet (April 15, 2025, doc 04-0040-26).
SPECIFICATIONS
Model: DCS-7280DR3A-36-F
Platform: Arista 7280R3A Series
Ports: 36 x 400GbE QSFP-DD
Throughput: 14.4 Tbps (28.8 Tbps full duplex) / 5.4 Bpps
Memory: 64 GB | Packet buffer: 16 GB
Rack units: 2 | Airflow: front-to-rear
Power: 643 W typical / 1283 W maximum
INCLUDED
Model: DCS-7280DR3A-36-F
Platform: Arista 7280R3A Series
Ports: 36 x 400GbE QSFP-DD
Throughput: 14.4 Tbps (28.8 Tbps full duplex) / 5.4 Bpps
Memory: 64 GB | Packet buffer: 16 GB
WARRANTY
5-Year BrightStar warranty for end user customers
90-Day BrightStar Warranty for resellers
SHIPPING
Free FedEx Ground shipping within the United States
FedEx Overnight shipping available as well
FedEx International Shipping available for customers outside of the United States
FAQS
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