The DCS-7280CR3MK-32D4S-F is a 1 RU fixed switch router with 32 ports of 100GbE and 4 ports of 400GbE, large route scale and encryption-capable 100G ports. It is part of the Arista 7280R3 Series and delivers 4.8 Tbps (9.6 Tbps full duplex) of throughput at 2 Bpps with front-to-rear airflow.
Key Specifications
Ports: 32 x 100GbE QSFP and 4 x 400GbE QSFP-DD
Maximum density: 4 x 400GbE; up to 48 x 100GbE (with breakout)
Throughput: 4.8 Tbps (9.6 Tbps full duplex) / 2 Bpps
Latency: from 3.8 microseconds
CPU / memory: Quad-core x86, 64 GB system memory
Storage: 120 GB SSD
Packet buffer: 8 GB
Route scale: Large route scale (7280R3K class)
Encryption: TunnelSec on the 32 x 100GbE QSFP ports; Arista lists license LIC-FIX-3-ENCR for TunnelSec and MACsec (hardware-capable; encryption operation requires the applicable Arista license)
Power draw: 545 W typical / 875 W maximum
Power supplies: 2 x PWR-1011, AC or DC (1+1 redundant)
Cooling: 3 fan modules (N+1 redundant)
Airflow: front-to-rear (port side intake, power supply side exhaust)
Dimensions (WxHxD): 17.3 x 1.72 x 22.0 in (43.99 x 4.37 x 55.83 cm); 1 RU
Weight: 27 lbs (12.27 kg)
Operating temperature: 0 to 40 C (32 to 104 F)
Deployment Scenarios
Encrypted DC interconnect and WAN edge: the 32 x 100GbE QSFP ports are encryption-capable for links that leave the building (hardware-capable; encryption operation requires the applicable Arista license)
Internet peering: large route scale (7280R3K class) with 8 GB of packet buffer
100G leaf with 400G uplinks: 4 x 400GbE QSFP-DD uplinks above 32 x 100GbE access ports
Choosing Among the Variants
Within the 7280R3 family, the 7280CR3-32D4 is the base 32x100G + 4x400G model, the 7280CR3K-32D4 adds large route scale, and the 7280CR3MK-32D4S adds large route scale plus encryption-capable ports. The 7280CR3MK-32P4S is the same system with OSFP instead of QSFP-DD 400G ports. 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-7280CR3MK-32D4S-F have?
The DCS-7280CR3MK-32D4S-F provides 32 x 100GbE QSFP and 4 x 400GbE QSFP-DD. Maximum density is 4 x 400GbE; up to 48 x 100GbE (with breakout).
What airflow direction is the DCS-7280CR3MK-32D4S-F?
The -F suffix means front-to-rear airflow. The DCS-7280CR3MK-32D4S-R is the same switch with rear-to-front airflow.
How much power does the DCS-7280CR3MK-32D4S-F draw?
Arista lists 545 W typical / 875 W maximum, with 2 x PWR-1011, AC or DC (1+1 redundant) power supplies.
Does the DCS-7280CR3MK-32D4S-F support encryption?
The hardware is encryption-capable: the 32 x 100GbE QSFP ports support TunnelSec. Operating encryption requires the applicable Arista license (Arista lists LIC-FIX-3-ENCR for this model), which Arista licenses separately.
BrightStar Systems supplies professionally tested refurbished Arista 7280R3 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 7280R3 Series with Encryption data sheet (April 15, 2025, doc 03-0050-29).
SPECIFICATIONS
Model: DCS-7280CR3MK-32D4S-F
Platform: Arista 7280R3 Series
Ports: 32 x 100GbE QSFP and 4 x 400GbE QSFP-DD
Throughput: 4.8 Tbps (9.6 Tbps full duplex) / 2 Bpps
Encryption: TunnelSec-capable (license required)
Rack units: 1 | Airflow: front-to-rear
Power: 545 W typical / 875 W maximum
INCLUDED
Model: DCS-7280CR3MK-32D4S-F
Platform: Arista 7280R3 Series
Ports: 32 x 100GbE QSFP and 4 x 400GbE QSFP-DD
Throughput: 4.8 Tbps (9.6 Tbps full duplex) / 2 Bpps
Encryption: TunnelSec-capable (license required)
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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