7300 Supervisor Module

The supervisor modules for the 7300 series run Arista Extensible Operating

System (EOS) and handle all control plane and management functions of the

system. One supervisor module is needed to run the system and a second

can be added for stateful 1+1 redundancy. Each supervisor module takes up

only a half slot resulting in very efficient use of space and a higher density

design. The quad-core x86 CPU with 16GB of DRAM and an optional SSD

provides the control plane performance needed to run an advanced data

center switch scaling to over 1,000 physical ports and thousands of virtual

ports. A pulse per second clock input port enables synchronizing with an

external source to improve the accuracy of network timing and monitoring

tools.

7300 Fabric and Fan Module

At the heart of the 7300 series is the fabric. It interconnects all line cards in a

non-blocking architecture irrespective of the traffic pattern providing a full

2.56 Tbps of forwarding to each line card module. Each line card module

connects to the fabric with multiple links and flows are spread across these

paths to efficiently utilize the available fabric capacity. The fabric modules are

always active-active, providing high availability and can be hot-swapped with

graceful performance degradation.

The fabric modules for the two chassis are different based on the size of the

chassis and each accommodate a set of individual hot-swap fan modules. The

fan modules support forward and reverse airflow and provide redundant

cooling. Each fan module can be independently replaced without any impact

of the system.

Arista 7300X Series Fabric/Fan and Fans

7300 Series | Platform Overview

7300 Power Supply Module

The 7300 series switches are equipped with a choice of reversible airflow

direction 3000W AC or 3000W DC power supplies. The power supplies

provide load sharing, support grid redundancy and are hot-swappable to

eliminate downtime when replacing power supplies. A maximum of 4 power

supplies are used on the 7304, and up to 6 power supplies on the 7308.

The AC power supplies are highly efficient in both platinum or titanium

climate saver rated options and have an efficiency of over 93% with single

stage conversion to the internal DC voltage. The DC power supplies require

inputs at-48V DC to deliver up to 3000W. The 7300 Series uses multiple small

power supplies which allows for incremental provisioning and smaller input

circuits. Variable power supply fan speeds ensure power supply efficiency is

optimized and reduces noise in data center environments.

Arista 7300X Series Power Supplies

Arista 7300X Series Supervisor