WILTW (What I Learned This Week) is a (hopefully) never-ending series of mini-posts, once a week, until the end of time. Terms and holidays apply.

Facebook and IPv6

To start off, I listened to this presentation where Paul Saab of Face::b00c (cute) discusses their IPv6 strategy. It is a video, but the recording is of his face without any link to the slides (they should learn from Cisco Live and how they do it).

Facebook has all the infra reachable by IPv6 and most of it is DS. They couldn't say they were using 100% IPv6 yet though because of one tiny problem: Java. It prefers IPv4 over IPv6 for some reason... which remains a mystery as details are in the slides.

Interestingly, he sees mobile and home users as a priority for IPv6 evolution and their experience is critical, because enterprises don't really care at the moment and are slow to deploy on the desktop side of things.

Good presentation and Paul was awesome as he dropped the link to the slides in the comments.


I knew of WebIOU, Andrea Dainese's creation that allowed you to easily create IOU/IOL labs in a pre-built VM with a nice web interface. Of course, IOU was for Cisco internal use and hush-hush, but you could find it if you knew your way around the web. The advantage of IOU is that you can run big topologies with significantly fewer resources than GNS3, but it suffers from the same reduced L2 support and general fiddliness. That should be addressed in IOSv which comes with VIRL from Cisco.

But back to UnetLab (Unified Networking Lab): the author takes it to a completely new level by adding support for a lot of different network devices (Cisco, Juniper, Riverbed, Palo Alto, F5, Fortinet, Alcatel, A10, Citrix, Checkpoint, Extreme, Arista).

Of course it's not seamless and it takes a bit of work to add these images, but it's very impressive for such a free tool. Go on and download it, it's one of the best lab tools you could have!

Until next week

Did you learn anything interesting this week? Let me know and share it with everybody else in the comments below!

And, as always, thanks for reading.

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