I started January 2018 blogging with a major service provider failure. Why should 2019 be any different? Here’s what Century Link claimed was causing two-day outage (more comments here).

Supposedly it was a problem with the management network used by their optical gear, but it looks a lot like a layer-2 network spanning 15 data centers and no control-plane policing on the managed devices… proving yet again that large-scale layer-2 networks are a really bad idea.

It’s been a long year – over 230 blog posts, 30 live webinar sessions, three online courses, half-dozen workshops, tons of presentations… it’s time Irena and myself disconnect, and so should you.

Wish you a quiet and merry Christmas with your loved ones and all the best in 2019! We’ll be back in early January.

Last week we published the first half of interview with Patrick Ogenstad, guest speaker in Spring 2019 Building Network Automation Solutions online course (register here). Here’s the second half.

ZTP is about provisioning. Can this include configuration as well?

You could argue that provisioning is a form of configuration and in that sense, provisioning can certainly include configuration. If your ZTP solution is good at configuration management is another question.

Inspired by The Zen of Python, Dinesh Dutt wrote The Zen of Routing Protocols:

Beautiful is better than ugly.

Simple is better than complex.

Complex is better than complicated.

So just because you can, don't.

The final topic David Gee and Christoph Jaggi mentioned in their interview was big data and AI (see also: automated workflows, hygiene of network automation and network automation security):

Two other concurrent buzzwords are big data and artificial intelligence. Can they be helpful for automation?

Big Data can provide a rich pool of event-sourcing information and, as infrastructures get more complex, it’s essential that automation triggers are as accurate as possible.

2018 was our busiest year ever… we created or updated 19 webinars, for a total of 32 live webinar sessions.

We wrapped up the 2018 webinars with Storage December featuring Hyper-Converged Infrastructure with Howard Marks and NVMe-over-Fabrics with J Metz (I never thought I would enjoy storage technology discussions, but Howard and J were brilliant)… and this is what we’ve been doing the rest of the year:

Zero-touch provisioning is always one of the big topics in the Building Network Automation Solutions online course, so we decided to invite Patrick Ogenstad (the author of excellent ZTP tutorial) to be a guest speaker in Spring 2019 course (register here).

In the meantime, enjoy his interview with Christoph Jaggi.

We love to claim that we’re engineers and yet sometimes we have no clue how technology we use really works and what its limitations are… quite often because understanding those limitations would involve diving pretty deep into math (graphs, queuing and system reliability quickly come to mind).

A networking engineer attending the Building Next-Generation Data Centers online course sent me this question:

My client will migrate their data center, so they’re not interested in upgrading existing $vendor load balancers. Would HAProxy be a good alternative?

As you might be facing a similar challenge, here’s what I told him:

Last week we published Matt Oswalt’s thoughts on using virtual labs in training and testing. In the second part of his interview with Christoph Jaggi he talked about building a virtual lab.

Matt will cover the same topic in way more details in his guest speaker presentation in Spring 2019 Building Network Automation Solutions online course. Register here.