Model Overview

The modular Arista 7280R3A is a high performance system that delivers 14.4Tbps of system forwarding and up to 5.4 Bpps with two

high capacity, deep buffer, packet processors in a configurable system. Nine interface module slots enable flexible configurations of up

to 36 ports of 400G, 144 ports of 100G, or up to 144 ports of 25G in a compact 4RU system.

Designed with ease of maintenance operations and flexibility in mind, the 7280R3A modular platform can be deployed as a common

building block for multiple network roles, with the ability to deploy the right interface mix in each deployment. The system also shares

its power supplies and high performance IO modules with the Arista 7358X4 for simple migration, reconfiguration and sparing.

The 7280R3A modular provides a choice of three levels of scale and functionality. The Standard (R3A), Encryption (R3AM) and Large

Scale (R3AK) Switch Cards each deliver high performance with a comprehensive feature set for enterprise and service providers. Suited

for both leaf or spine deployment in modern large scale networks, addressing the challenges of increasing network capacity and

efficiency through lower power, enhanced automation and advances in scalability.

The modular 7280R3A is designed around the 7289R3A switch card (7289R3A-SC), that is fully connected to 9 I/O module slots

delivering 3.2Tbps of system capacity to each slot with 16GB deep packet buffers for superior burst absorption. The supervisor module

runs Arista Extensible Operating System (EOS) on an eight core CPU with 64GB of memory with the scalability to support demanding

control plane workloads. The removable interface modules provide for mix and match of interface types and density including 25G,

100G, 200G and 400G with each module supporting a range of interface speeds using industry standard optics and cables. Each IO

module connects directly to the switch card without adding any oversubscription. All components of the system including the switch

card are removable for ease of maintenance and simplifying upgrades.

The system supports up to 4 high efficiency hot-swappable AC or DC power supplies, providing sufficient power for both current and

future needs, with both grid and power supply redundancy to eliminate downtime when replacing power supplies. High performance

fan modules deliver resilient data center optimized system cooling from front to rear.

DCS-7289-SUP-D Supervisor Module

Eight core CPU and 64GB memory for high

performance control plane, Ethernet and

management ports with optional SSD for storage.

Arista 7280R3A

9-Slot System

System Front

(144 ports of 100G)

System Rear

(Front to Rear Airflow)

DCS-7368-4D QSFP-DD - 4 ports of 400G

with QSFP-DD optics and cables and the

use of existing 100G optics and cables.

DCS-7358-16C QSFP100 - 16 ports of

100G, up to 8 ports of 200G mode (alternate

ports)

DCS-7368-4P OSFP - 4 ports of 400G with

OSFP optics and cables, and the use of

existing 100G optics and cables.

DCS-7368-16S SFP28 - 16 ports of 25G

with support for 25G and 10G on all ports.

7280R3A Modular Series | Platform Overview