Arista 7500R Series | Comsys

Arista 7500R Series

Arista 7500R Series Overview 

Designed for large virtualized and cloud networks the Arista 7500R Series modular switches are the industry’s highest performance universal spine switches. They combine 100GbE density with internet scale table sizes and comprehensive L2 and L3 features. Advanced EOS features for network monitoring, precision timing, VXLAN network virtualization are combined with extensive hardware resources with a rich choice of systems and line cards to support lasting investment protection.

The 7500R Series enable highly scalable cloud network designs with MLAG, ECMP and VXLAN technologies.The Arista 7500R Series FlexRoute engine and EOS NetDB provides the scalability to support Internet IP routing scale with the lowest power consumption and fast convergence while scaling to millions of routes.

Arista 7500R Series Universal Spine Overview

 High Performance Universal Spine

  • Non-blocking 115Tbps of system capacity
  • High density 10/25/40/50/100G ethernet
  • 432 wire speed 100GbE ports
  • Ultra deep buffers up to 24GB per line card
  • Class leading latency of 3.5usec
  • 9.6Tbps of fabric capacity per line card
  • 13,824 Virtual Output Queues per port to eliminate head of line blocking
  • 200GbE and 400GbE ready

Arista EOS

  • Single binary image
  • Fine-grained truly modular network OS
  • Scalable control plane for internet peering
  • Extensible platform – bash, python, C++ , GO, OpenConfig
  • Resilient self-healing software
  • Rich Streaming Telemetry solutions

Scalable Cloud Designs

  • Comprehensive L2 and L3 feature sets
  • Internet scale IPv4 and IPv6 forwarding tables
  • Up to 51Bpps of wire speed forwarding
  • CloudVision provisioning and automation
  • VXLAN for next generation DC
  • LANZ for microburst detection


Arista 7500R Series Technical Specifications

The Arista 7500R Series of modular switches deliver the industry’s highest performance with 115Tbps of system throughput to meet the needs of the largest scale data centers. With a choice of systems the 7500R Series provides four, eight or twelve line card modules, two supervisor modules, and six fabric modules. Designed for continuous operations and with system wide monitoring of hardware and software components, simple serviceability and provisioning to prevent single points of failure the hardware architecture supports high-availability with hot-swap of all components

System Comparisons

Available in a compact system design, as a choice of 12, 8 and 4 slot, the Arista 7500R Series enables a full range of wirespeed ports from 1G to 100G. It lowers total cost of ownership as it is designed to be efficient with power per port as low as 25W per 100GbE port which combined with front to rear cooling to optimize the data center environment produces the most reliable, dense and power efficient modular switch.

System Performance
7508 Specifications
7508 Specifications
7504 Specifications
DescriptionDelivers the highest density, lowest power, and fastest Ethernet switching system.Delivers high density, low power non-blocking Ethernet switching system.Seven rack units of awesomeness, optimum form-factor for many mid-size deployments.
Switching Capacity115Tbps75Tbps38Tbps
Linecard Capacity9.6 Tbps9.6 Tbps9.6 Tbps
10GbE Interfaces1,7281,152576
25GbE Interfaces1,7281,152576
40GbE Interfaces432288144
50GbE Interfaces864576288
100GbE Interfaces432288144
Forwarding Rate51 Bpps34.5 Bpps17.3 Bpps
Total Buffer288GB192GB96GB
Rack Units18137
Maximum Power Draw12,824W8,586W4,978W
AirflowFront to RearFront to RearFront to Rear

The 7500R modular chassis can accommodate any combination of the 7500E line cards or 7500R line cards providing a rich choice of density and speed.

7500R Line Cards Comparison

The 7500R Series offer a broad choice of line cards with a choice of speed and density options up to 36 ports of wire speed 100GbE and 40GbE. Every 100GbE interface supports a choice of 5 speeds including 25GbE and 50GbE providing unparalleled flexibility and the ability to seamlessly transition data centers to the next generation of Ethernet performance.

7508 Specifications
7508 Specifications
7504 Specifications
Ports36 x 100G QSFP30 x 40G / 6 x 100G48x 10G and 2x 100G
Max 100GbE3662
Max 50GbE72124
Max 40GbE36362
Max 25GbE144248
Max 10GbE1449656 (48+8)
Port Buffer24GB8GB4GB
Switching Capacity3.6 Tbps1.8 Tbps680 Gbps
Forwarding Rate4.32 Bpps1.4 Bpps720 Mpps

Combined with the highly modular, robust Extensible Operating System (EOS), a dynamic smart deep buffer architecture with virtual output queuing for lossless forwarding, low latency and wire speed performance, the Arista 7500R line cards enable scalable and high performance data center solutions.


Each 7500R Series line card delivers a consistent set of features supporting layer 2 and layer 3 data center designs with predictable and linear scaling. Arista’s FlexRoute Engine enables full Internet routing coupled with support for a variety of IP/MPLS/VxLAN protocols.

7500R Linecards
LatencyUnder 3.5usec
MAC Table Size768K
Maximum IPv4 Host Routes768K
Maximum IPv6 Host Routes768K
Maximum ACL Entries24K
Maximum IPv4 Route PrefixesOver 1M
Maximum IPv6 Route Prefixes768K
Maximum Multicast Routes768K
Maximum ECMP128-way


The Arista 7500R Series is designed with the latest in switching silicon and software.

The Arista 7500 Series leverages a deep buffer virtual output queue (VOQ) architecture that is 100% efficient, eliminates head-of-line (HOL) blocking and virtually eliminates packet drops even in the most congested network scenarios. An advanced traffic scheduler fairly allocates bandwidth between all virtual output queues while accurately following queue disciplines including weighted fair queuing, fixed priority, or hybrid schemes. As a result, the Arista 7500 can handle the most demanding data center requirements with ease, including mixed traffic loads of real-time, multicast, and storage traffic while still delivering low latency.