The evaluation section (in the blog) talks about "traditional data centre networks." What are they? Cisco has released a data centre network design that has b

The evaluation section (in the blog) talks about "traditional data centre networks." What are they? Cisco has released a data centre network design that has been out for nearly 6 years now. The design outlined in the VL2 paper is similar. @those who operate DC networks: what does your topology look like? How do you handle oversubscription in a fair manner? If anyone here works at Amazon, could they shed light on fairness issues: can one VM blasting traffic using UDP hurt another that uses vanilla TCP?