BGP, Border Gateway Protocol, is the routing protocol that connects the internet, and it is versatile enough to be used from small to large environments. This will be a small reference for BGP basic knowledge. – Basics of BGP – Confederations – Route Reflectors – Neighbour Formations – Path Selection – BGP Synchronisation – BGP […]
Basic BGP Information Read More »
I have been over the automatic creation of the VXLAN topology in the previous post. However, this stopped at the creation of the topology only. If in the future I wanted to add a new spine or leaf switch, this could be done, but the other switches wouldn’t be aware as they would also need
Arista VXLAN 3 – Automating Adding New Spine and Leaf Switches Read More »
This is going to follow on from the previous post to get a basic three switch topology up and running with VXLAN. This time however, instead of doing more VXLAN I will concentrate on a way to automate the adding of spine and leaf switches to the fabric.The purpose of this automation piece is to
Arista VXLAN 2 – Automating Spine and Leaf Configuration Read More »
This lab use part of the Arista Spine and Leaf topology I have created in GNS3. Specifically, I will only be using three switches. One spine and two leaf switches. I have chosen this to get a good understanding of the core concepts of VXLAN, HER and EVPN. This is the basic VXLAN topology that
Arista VXLAN 1 – VXLAN, HER and EVPN Basic Configuration Read More »
AEM is the event handler for Arista. It can be used to automate tasks giving the user the ability to customise alerts and actions. There are three parts to ARM; Event Manager, Event Monitor and Linux Tools. Send XMPP Message on Interface ChangeDownload script and execute if startup-config presentUsing variables in AEMRunning Script Before EOS
In the previous XMPP post, I was using local users in the XMPP ejabberd server. There was command authorisation in the form of a setting on the XMPP configuration of each Arista switch. The default is 1, however this will not permit show run, or configuration commands and others. This post will explain how to
Using ISE AAA TACACS For Arista XMPP Read More »
Now that the XMPP server and switches have been configured, commands can now be issued from an XMPP client either on the switch or a client running in Linux, Windows, etc.This post will demonstrate the issuing of commands from the IM client Gajim and the Arista switches themselves using XMPP. By default, when configuring the
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Extensible Messaging and Presence Protocol is an open standard protocol for instant messaging. Arista switches can use this protocol as a way to configure multiple switches with the same configuration at the same time. Arista switches can even be grouped, so all spine switches, or all leaf switches, or switches in a certain location, etc.
Arista XMPP Configuration Read More »
Zero Touch Provisioning is a way for Arista switches to get a configuration file via DHCP options and configure itself with no interaction from an admin. All there is to do is connect up the switch and IP/config will be applied to the switch.ZTP will only run when there is no startup-config file, so first
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The Arista vEOS switch was a little tricky to get working on GNS3. Arista do provide a vEOS for lab testing. All you need is to sign up with any email and the vEOS software for labs will be at the bottom. Registration can be found here: https://www.arista.com/en/user-registrationDownloaidn the image once registered can be found
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