Arista Networks Switch Quick Look Datasheet
Quick Look Datasheet

Arista 7250X Series Network Switch

Low Latency data center switch
Arista 7250X Series Network Switch

High Performance

  • 5Tbps system capacity
  • Up to 3.84 billion packets per second
  • Wire speed unicast & multicast
  • Class leading latency from 550ns
  • High density 10G/40G
  • Dynamic buffer allocation 48MB
  • Under 10W per 40G port

Feature Rich

  • High Availability
  • DC optimized air"ow
  • Rich L2 and L3 features
  • 64-Way MLAG
  • 64-Way ECMP
  • VXLAN gateway
  • Zero touch provisioning
  • Hitless MLAG ISSU

High Scalability

  • System scalability
  • 64 x 40G
  • 256 x 10G
  • Scalable Spline and Leaf/Spine designs
  • MAC 288K / IPv4 Hosts 208K
  • Routes: 16K IPv4 / 8K IPv6
  • UFT – IPv4/v6 144K/77K

Advanced Monitoring

  • LANZ microburst detection
  • DANZ advance monitoring
  • AEM proactive management
  • sFlow for network visibility
  • SSD for local monitoring
  • VM Tracer integration
  • RAIL for Big Data and Hadoop


Arista 7250X Series Introduction

The Arista 7250X Series are the benchmark for performance, scale and power efficiency in 2RU data center switches. Increased adoption of 10G servers is accelerating the need for "flexible, dense 10GbE/40GbE solutions. The Arista 7250X Series Network Switch extends the industry leading Arista 7000 Series with increased performance, scalability, density and rich features designed for software defined networking.

The Arista 7250QX-64 is a compact 2RU 10GbE and 40GbE high performance, low latency and scalable system powered by Arista EOS, the worlds most advanced network operating system.

7250QX Deployment Scenarios

Scale out network designs allow solutions to start small and expand over time; simple highly scalable one and two-tier network designs are built with MLAG, ECMP and VXLAN technologies.

Cloud Networking: 2-tier Leaf/Spine or 1-tier Collapsed Spine

Low Latency data center switch

The 7250X Series are ideal for a number of deployment scenarios inside the data center. With the "exibility of 64 ports of QSFP+ supporting dense 40GbE or 10GbE they are ideal for use as a single tier collapsed leaf and spine or at both the leaf and spine layers of two-tier networks. The Arista universal network architecture is optimized for all application types ranging from large cloud to enterprise deployments. The following are a selection of use cases:
  • Collapsed Spline™ Server

    — access as middle of row or end of row supporting full range of 10G and 40G connection options
  • Leaf-Spine

    — open standards based L2 and L3 with monitoring and visibility features — LANZ, DANZ and Network Tracers
  • ECMP designs up to 64-way

    — cost-effective multi-pathing solutions using open protocols as either the spine or as a leaf connecting to 7500 and 7300
  • Software Defined Networking

    — with support for OpenFlow, DirectFlow, eAPI and VXLAN
  • Enterprise Aggregation

    — with up to 256 x 10G ports or 64 x 40G - full L2 and L3 features
  • Grid / HPC

    — designs requiring cost effective and power efficient systems to enable non-blocking or minimal over-subscription
  • Spine for Hadoop and Big Data Applications

    — with fully meshed east-west connectivity
  • Directly Connected 40GbE Attached Storage

    — dense NFS systems, requiring high performance and predictable latency

Arista EOS

Arista EOS is a modular switch operating system with a unique state sharing architecture that cleanly separates switch state from protocol processing and application logic. Built on top of a standard Linux kernel, all EOS processes run in their own protected memory space and exchange state through an in-memory database. This multi-process state sharing architecture provides the foundation for in-service-software updates and self-healing resiliency.


Network Address Translation *

Network address translation with no performance impact to resolve overlapping addressing challenges without penalty

Wirespeed VXLAN

Seamless integration between VXLAN and L2/L3 environments, physical and virtualized networks

Accelerated SW Update *

Optimized SW upgrades to reduce the impact of software upgrades and avoid network convergence

64-way ECMP and LAG

Improve network scalability and balance traffic across large-scale leaf-spine designs or server load balancers

Latency Analyzer

A solution to improve monitoring and visibility at both 10G and 40G for congestion from persistent or microbursts.

Cloud Control & SDN

Support for Openflow and OpenStack automation and self-service provisioning with cloud scale economics.

Scalable Tables — ALPM and UFT

Flexible allocation of L2 and L3 forwarding table resources for greater design choice.

7250X Series Systems

Arista 7250X Series support hot-swappable power supplies, N+1 fan redundancy, EOS high availability, a choice of L2 and L3 multi-pathing designs and powerful EOS innovations for visibility, application level performance monitoring and virtualization.


Interface Type


10G Ports

Up to 256

40G Ports

Up to 64

Rack Units



550ns to 1800ns




F-R / R-F

Arista 7250X low latency network switch
Arista 7250X low latency network switch

7250QX-64 Switch Front View

64 QSFP+ ports supports a flexible combination of 256x 10GbE or up to a full 64x 40GbE ports.

7250QX-64 Switch Rear View

  • Dual hot-swap power supplies
  • Four N+1 fan modules
  • Color coded PSU and Fans
  • Shared common equipment with 2RU 7050X
Copyright © 2017 Arista Networks, Inc. All rights reserved. CloudVision, and EOS are registered trademarks and Arista Networks is a trademark of Arista Networks, Inc. All other company names are trademarks of their respective holders. Information in this document is subject to change without notice. Certain features may not yet be available. Arista Networks, Inc. assumes no responsibility for any errors that may appear in this document.     11-0009-01