This paper describes a way to insert middle boxes into the network in a logical but not physical fashion. This certainly relates to previous paper we have read that argues why middle boxes are disliked by the academic community because they break certain assumptions that were made during the design of the Internet.
Given a controlled environment such as Internet data center, the designer is essentially given the freedom to start from a clean slate. This allows this work to have a chance to be deployed as supposed to be a pure academic exercise, which I am really looking forward to. I suspect only real deployment will tell whether the complexity in its design is going to be an issue in daily operation or not.
In addition, I am worried that the performance overhead in the design (presenting itself as reduction in throughput as well as increase in latency) is going to render the system not cost effective economically. I am not sure how much of it comes from the fact it is Click-based and its software overhead, but it would be nice if authors could have attributed the overhead in more detail. (or perhaps our course project would help)
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