Using Arista Telemetry to Monitor Network State

Arista’s Telemetry product allows you to stream network state in real-time from each piece of switching hardware to a central management point. Recently I’ve been waiting to prove out the visibility of the Telemetry product during a maintenance event. I recently had the opportunity when we were switching carriers on a transatlantic link between two sites.

The screenshot below shows a 30 minute slice of time where fiber optic links were brought down on Carrier A, traffic flow changed, connectivity was restored with Carrier B, and normal traffic flow resumed.

1 – Technicians disconnect fiber for the Primary Circuit at sites A and B.
2 – As the routing neighbor between the A and B sites drop, traffic is automatically moved to the Secondary Circuits.
3 – When optical connectivity has been restored between the two sites, the Primary Circuit re-establishes. Routing reconverges and traffic is shifted back onto the Primary Circuit.

Normal workflow for a change like this involves camping Syslog and the various switches involved, issuing commands to show network activity as the maintenance progressed. With Arista’s Telemetry product, I was able to see the state of various network components (light levels, interface state, bit rate, etc) all in a real-time display.

So far an impressive way to gain visibility into network state across a bunch of different metrics at a glance. I’m looking forward to test this product with my other future projects.

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Arista ACE Training

Last week I had the opportunity to attend Arista ACE 2.1 training down at the HQ offices in Santa Clara. I was very fortunate to be in a class that was lead by Gary Donahue, the author of Arista Warrior. He is an excellent presenter and a extremely personable individual. If you ever have a chance to be in a class of his, sign up for it.

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The training was very hands on, with labs that covered Zero Touch Provisioning (ZTP), Multi-Chassis LAG (MLAG), Virtual Extensible LAN (VXLAN), and my favorite topic, the wonderful EAPI. Coming from a Cisco CCNA/CCNP background, these topics helped fill knowledge gaps on the Arista family of hardware.

At the end of the class, Gary was signing copies of his book so I left with a author signed copy of Arista Warrior. Not a bad addition to the growing collection of O’Reilly books around the house.

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