NeTS:Medium:Internet Measurement in the Large

尽管经过多年的努力，互联网的底层结构对网络研究人员来说仍然很不透明。 这种不透明的结构也是ISP管理员试图诊断连接问题的障碍-当问题发生时，如果问题不在ISP自己的网络中，则很难确定根本原因。 在我们看来，这种不透明的结构主要是由于缺乏测量互联网的Vantage位置：有超过10万个唯一路由的前缀，但只有几百个位置可以发射探测器。该项目通过开发技术来解决这种缺乏有利位置的问题，使用特殊类型的测量数据包来模拟具有大量Vantage位置的情况。具体来说，PI建议将这些技术构建成一个测量工具，与几个ISP合作，让他们采用和部署该工具，并将其部署在NSF和ISP支持的测试平台PlanetLab上。 使用该工具，一些关于互联网的基本问题将被研究：互联网是如何发展的？互联网结构是自相似的吗？非对称路由的普遍程度如何？要想了解拟议中的互联网变革的影响，就需要回答这些问题。PI还将公开测量结果。 该奖项是根据2009年美国恢复和重建法案（公法111-5）资助的。

Despite years of effort, the underlying structure of the Internet is still largely opaque to networking researchers. This opaque structure is also a barrier to ISP administrators trying to diagnose connectivity problems - when a problem occurs, it can be difficult to identify the root cause if it is not in the ISP's own network. In our view, the opaque structure is primarily due to the lack of vantage points from which to measure the Internet: there are more than 100,000 uniquely routed prefixes, yet there are only a few hundred locations from which one can launch probes. This project addresses this lack ofvantage points by developing techniques, using special types of measurement packets, to simulate having a very much larger number of vantage points. Specifically, the PI proposes to build these techniques into a measurement tool, work with several ISPs to have them adopt and deploy the tool, and also deploy it on an NSF and ISP supported testbed called PlanetLab. Using the tool, a number of fundamental questions about the Internet will be studied: How is the Internet evolving? Is the Internet structure self-similar? What is the prevalence of asymmetric routing? Answers to these questions are needed to understand the impact of proposed changes to the Internet. The PI will also make the measurements publicly available. This award is funded under the American Recovery and Reconstruction Act of 2009 (Public Law 111-5).