Hello! I'm Cristian Sîrbu.

I'm a network architect, consultant and trainer, currently based in the beautiful city of Dublin. I do love traveling and solving problems, so if I there's something I could do for you, please get in touch.

You can find me on Mastodon or LinkedIn or drop me a line at cristian at trueneutral · eu .

A bit of background

Throughout my career I've seen all sorts of networks, operated a bunch of them on a day to day basis, offered support to various customers, got my CCIE (#43453) digits, wrote designs, argued over many colourful scribbles on whiteboards, taught Routing & Switching to many engineers, developed L2-4 testing software, coded anything from quick and dirty scripts to webapps, automated what I could and manually configured what I couldn't, had fun with Linux for both servers and my own PCs, and (because you're already wondering if there's an end to this) helped launch 4G/LTE for a mobile provider.

In August 2015 Donal and I kick-started the Irish Network Operator Group, an inclusive, open, and healthy Community of Practice around all aspects of network engineering. It has grown to incredible numbers and really awesome meetings, which we organize together with a bunch of volunteers and our varied and very generous hosts (Intercom, Airbnb, Google, Workday, Facebook, Arista, Riot Games). The story is introduced here, continues with a report in 2016, a 13 minute talk in May 2018 at RIPE76, and the latest update iNOG at three and a half.


Aside from networky things, I love open-source and enjoy a spot of python every now and then. When it comes to music I am very picky and I can't have enough of science fiction and fantasy. I love reading, hiking, table tennis, travel, boardgames, and generally more things than I can fit in one life. But I keep trying.

This is my website and you can find the story behind its current incarnation here. Most articles are technology related, with a heavy bias towards networking and systems engineering. It is hosted on Debian Linux, served by Nginx and generated with pelican.

Disclaimer The serious bits.

First of all, do take everything written here with a grain of salt. While I do my best to thoroughly research the stuff I post, mistakes do happen and my view might not be the best.

I will not be held responsible for any action you take after reading my posts. There's no excuse for not verifying facts and opinions - never trust your life or your career with things you find on the Internet!

That said, I happily accept any constructive criticism and I'm open to discussions about my posts. I am continuously learning and future-me might not completely agree with everything I've written (future-me will also fix my mistakes where possible).

The content on this website represents my views and my views only - it is not linked to the opinions of past, present or potential employers.