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Hybrid cloud connectivity with Arista’s Extensible Operating System (EOS) and Amazon Web Services (AWS)

Posted on November 8, 2019 by   |   170 Views

Motivation The term Hybrid Cloud is not clearly defined but the most common definition is a scenario where a customer wants to combine resources in their own data centre (the private cloud) with resources in the public cloud. To allow these services to communicate, a connection between the two cloud environments needs to be established. Most cloud providers offer two options: An Internet Protocol Security (IPsec)-based Virtual Private Network (VPN) connection using the Internet as a transport media and a private link using dedicated lines or equivalent technology. In this article, we cover the VPN based approach using EOS-based services...
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How do I know which version of code I should run?

Posted on July 5, 2018 by   |   0 Views

Newish to Arista. I have a pair of DCS-7280SR-48C6-M-F that I am getting ready to deploy. They’re currently running 4.18.4.2F, but that was loaded months ago in the lab. How do I know which version of code I should be running? Does Arista have a software selector tool or matrix to help guide customers to the most appropriate release? Thanks. Mike

DCS-7124 EOS Versions?

Posted on June 7, 2018 by   |   0 Views

Hi all; Very new to Arista; I have a dcs-7124sx and was wondering what the latest and greatest version of EOS I can safely upgrade this to? does anyone know if there is a limit? Docs say End of Life EOS 4.1.3; but i just performed full recover on this switch and its booting 4.6.2? Thus my question regarding the EOS version I can install. Thank You for any help…

Network CI/CD Part 1 – Building network topologies with Docker and cEOS-lab

Posted on May 4, 2018 by   |   2451 Views

Introduction As the networking industry continues riding the DevOps wave and network engineers become more comfortable using automation tools like Ansible and Salt, network still remains the most brittle piece of IT infrastructure. Partially this can be justified by the fact that network underpins all other areas of IT infrastructure stack – compute, storage and virtualisation. However we, as network engineers, have done very little to improve our confidence in networks and until now some of the biggest outages were caused by trivial network configuration mistakes. When software industry was facing similar challenges, the response was to create Continuous Integration (CI) pipelines –...
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vEOS-Lab on Hyper-V

Posted on January 19, 2018 by   |   810 Views

Introduction There are multiple ways to setup a vEOS-Lab environment if you have a linux system or on hypervisors such as VMware ESXi, vCenter, VM Workstation, VM Fusion, Virtualbox, etc using the vmdk provided in the Software downloads page. But if you have a Windows machine or a Windows server, the vmdk will not be useful. So here are the steps on how you can convert the vmdk to a  vhdx and create a vEOS VM on Hyper-V. Pre-requisites 1. Hyper-V Manager and Hyper-V 2. vEOS-Lab vmdk 3. Aboot ISO  Instructions Steps 1. Download the vEOS vmdk for the EOS version...
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Understanding EOS Software Download Options

Posted on September 13, 2016 by   |   10656 Views

This post is to help explain the different Software Download options for a particular EOS release. For recommendations on which train or version of EOS you should use, please take a look at our Software Lifecycle, and Recommended Release pages. This advice only concerns images located in the Active and Support Only Releases folder. Images from the Other Releases and EFT folders are not for general use. Those releases are available only for specific deployments, and should only be used when specifically recommended by Arista. In this case, I’m taking a look at EOS-4.17.1F and you can see from the...
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Deploying Virtual SAN Over L2/L3 Networks with Arista Networking Devices

Posted on May 24, 2016 by   |   3050 Views

This is a great posting from on how to deploy Virtual SANs over an Arista underlay networks with the actual switch configurations. Here is the video on how to automate the deployment of a VSAN infrastructure from the same blog – VMware Virtual SAN Stretched Cluster Automated Deployments with PowerCLI Thought our user community would benefit from these blog postings. Happy reading!    

Introduction to Managing EOS Devices – Memory Utilisation

Posted on May 20, 2016 by   |   8619 Views

A common question that users new to EOS have is concerning the high levels of memory utilisation seen on Arista switches (~70% utilised). Typically this is first flagged by the NMS and triggers a low memory warning or alarm. Unlike a traditional switching OS, EOS uses Linux page caching. Most free memory is used as a live cache and very low ‘free memory’  numbers are entirely normal, providing that enough memory is available from the buffers and cached memory for applications demanding more RAM. In this case, the OS is capable of freeing up memory from cache as processes demand it. Memory...
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Upgrade Questions for EOS

Posted on December 10, 2015 by   |   0 Views

We are about to upgrade our Arista switches to address the newest vulnerabilities that came out recently, and I have a few questions I’m hoping you can help with. Some of our switches are on older hardware. Is there a table somewhere that lists the highest code level a particular platform can run? Will all newer code releases run on all older hardware? Some of our switches are running very old code. Does SSU work on very old code (say, 4.5)? Assuming not, what is the upgrade path to get these switches up to 4.14…? Do I have to upgrade...
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Script to update EOS in sw’s in a bulk

Posted on December 10, 2015 by   |   0 Views

Hi We want to upgrade EOS in sw’s. We want to automate this process. We can use solarwinds to execute a script or a phython script to do it. If someone can provide with template for it so we can test it in a lab sw and use it in production.   Thanks Raj  

Installing Puppet on EOS

Posted on August 5, 2015 by   |   9178 Views

Getting started with Puppet and EOS isn’t a difficult process. It involves taking advantage of the extensible nature of EOS. There are two primary extensions that need to be loaded in EOS in order for an Arista network element to be included in the Puppet ecosystem. Installation Installation of the agent on a switch includes adding the Ruby Client for eAPI (rbeapi) and the Puppet agent extensions, basic management configuration, including hostname, domain, and time synchronization (for SSL certificate management), and enabling eAPI access to the switch. Additionally, the Puppet master needs the appropriate modules installed (NetDev_stdlib and EOS) so you...
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Arista’s EOS Innovation Enabling Ecosystem Partner Software Development

Posted on May 7, 2015 by   |   6933 Views

Network software automation and intelligence is a passion we share as network engineering software developers at Intelligent Visibility, Inc. Creating innovative software solutions in the rising world of software-defined networking (SDN) can prove challenging. The source data that we require for our software is mostly located within the network device’s operating system. In the past accessing this source data has been a serious time investment mainly due to inconsistent API implementation types across different operating systems for many different hardware platforms.

How to keep last X startup configs

Posted on April 24, 2015 by   |   7084 Views

If you would like to keep track of last 10 (or more, or less) configuration changes, here’s the event-handler code to do that: event-handler config-versioning    trigger on-startup-config action bash FN=/mnt/flash/startup-config; LFN="`ls -1 $FN.*-* | tail -n 1`"; if [ -z "$LFN" -o -n "`diff -I 'last modified' $FN $LFN`" ]; then cp $FN $FN.`date +%Y%m%d-%H%M%S`; ls -1r $FN.*-* | tail -n +11 | xargs -I % rm %; fi    delay 0 Description: Every time the startup config gets changed, this event handler will be executed (“trigger on-startup-config”). You could increase the delay, if you wish, but now it’s engaged immediately...
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Fabric Visibility

Posted on January 30, 2015 by   |   8488 Views

A leaf and spine fabric is challenging to monitor. The fabric spreads traffic across all the switches and links in order to maximize bandwidth. Unlike traditional hierarchical network designs, where a small number of links can be monitored to provide visibility, a leaf and spine network has no special links or switches where running CLI commands or attaching a probe would provide visibility. Even if it were possible to attach probes, the effective bandwidth of a leaf and spine network can be as high as a Petabit/second, well beyond the capabilities of current generation monitoring tools. The 2 minute video...
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Fan Failure String Status Question

Posted on December 22, 2014 by   |   0 Views

Hi, Sorry for this weird request, but I am looking to know the exact string that EOS will give me in an show environment all command results output? <Snippet from show environmental all – all fans good in this case.> Airflow: front-to-back Fan Tray         Status           Speed ---------------- --------------- ------ 1                Ok                 46% 2                Ok                 46% 3                Ok                 46% 4                Ok                 46% 5                Ok                 46% 6                Ok                 46% Thank you much in advance! Mike

Recommended Minimum EOS Release API?

Posted on December 22, 2014 by   |   0 Views

Arista does a great job posting the Recommended Minimum EOS Release versions however it requires partner level access (the information I have found thus far). I would like to programmatically access this information and I was hoping that Arista might have this information in a RestFUL API or at a minimum a public web link? Any help is appreciated.   Thank you again, Mike Cotrone

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