There is more to IXPs than meets the eye
There is more to IXPs than meets the eye
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DOI：
10.1145/2541468.2541473
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发表时间：
2013-11
期刊：
影响因子：
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通讯作者：
N. Chatzis;Georgios Smaragdakis;A. Feldmann;W. Willinger
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文献类型：
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作者：
N. Chatzis;Georgios Smaragdakis;A. Feldmann;W. Willinger
互联网交换点（IXP）通常被认为是四个网络接入点（NAP）的继承者，NAP在1994/95年被授权作为国家科学基金会网络（NSFNET）退役的一部分，以促进从NSFNET过渡到我们今天所知道的“公共互联网”。虽然这种流行的观点并没有说明IXP早期开始背后的全部故事，但事实是，自1994年左右以来，全球运营的IXP数量已经增长到300多个（截至2013年5月），最大的IXP处理的每日流量与最大的Tier-1 ISPs相当。然而，IXP从未真正引起网络研究社区的关注。乍一看，这种缺乏兴趣似乎是可以理解的，因为IXP显然与当前的“热门”领域（如数据中心和云服务或软件定义网络（SDN）和移动的通信）没有什么关系。然而，我们在本文中认为，事实上，IXP都是关于数据中心和云服务，甚至SDN和移动的通信，并且应该对有兴趣了解当前和未来互联网生态系统的网络研究人员产生极大的兴趣。为此，我们调查了现有的，但很大程度上分散的公共信息来源IXP描述其基本的技术和操作方面，并强调在世界不同地区，特别是在欧洲和北美的各种IXP之间的关键差异。更重要的是，我们说明了IXP在当今互联网生态系统中发挥的重要作用，并讨论了欧洲IXP驱动的创新如何塑造和重新定义互联网市场，不仅在欧洲，而且在世界各地越来越多。
Internet eXchange Points (IXPs) are generally considered to be the successors of the four Network Access Points (NAPs) that were mandated as part of the decommissioning of the National Science Foundation Network (NSFNET) in 1994/95 to facilitate the transition from the NSFNET to the "public Internet" as we know it today. While this popular view does not tell the whole story behind the early beginnings of IXPs, what is true is that since around 1994, the number of operational IXPs worldwide has grown to more than 300 (as of May 2013), with the largest IXPs handling daily traffic volumes comparable to those carried by the largest Tier-1 ISPs. However, IXPs have never really attracted much attention from the networking research community. At first glance, this lack of interest seems understandable as IXPs have apparently little to do with current "hot" topic areas such as data centers and cloud services or Software Defined Networking (SDN) and mobile communication. However, we argue in this article that, in fact, IXPs are all about data centers and cloud services and even SDN and mobile communication and should be of great interest to networking researchers interested in understanding the current and future Internet ecosystem. To this end, we survey the existing but largely fragmented sources of publicly available information about IXPs to describe their basic technical and operational aspects and highlight the critical differences among the various IXPs in the different regions of the world, especially in Europe and North America. More importantly, we illustrate the important role that IXPs play in today's Internet ecosystem and discuss how IXP-driven innovation in Europe is shaping and redefining the Internet marketplace, not only in Europe but increasingly so around the world.