[MrZipf]

This looks great. They also have the advantage that James Hamilton mentioned AMZ got from building their own hardware - the get to do a cleansheet s/w design and not have to support all the gazillion options that Cisco does.

The talk was on HN a little while ago, worth watching: https://www.youtube.com/watch?v=JIQETrFC_SQ

The scale at FB means they're probably saving hundreds of millions doing this.