Yeah, I know it’s Facebook and I had to unblock their domain to even read this, but this is interesting.

It’s really just an extension of a standard sort of design that I’ve been reading a lot about lately, but amped up to 11.

We were able to build our fabric using standard BGP4 as the only routing protocol. To keep things simple, we used only the minimum necessary protocol features.

It’s actually a really simple network design though I know it looks byzantine and complicated. It’s awesomely scalable; I’m impressed. I’ll likely never need something like that, or even to design something 1/100 that powerful, but it does give me some ideas that I can use in networks that I’ll likely build.