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p75_0 - Internet Inter-Domain Traffic Craig Labovitz Scott...

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Internet Inter-Domain Traffic Craig Labovitz, Scott Iekel-Johnson, Danny McPherson Arbor Networks Ann Arbor, MI {labovit, scottij, danny}@arbor.net Jon Oberheide, Farnam Jahanian University of Michigan Ann Arbor, MI {jonojono, farnam}@umich.edu ABSTRACT In this paper, we examine changes in Internet inter-domain traffic demands and interconnection policies. We analyze more than 200 Exabytes of commercial Internet traffic over a two year period through the instrumentation of 110 large and geographically diverse cable operators, international transit backbones, regional networks and content providers. Our analysis shows significant changes in inter-AS traffic patterns and an evolution of provider peering strategies. Specifically, we find the majority of inter-domain traffic by volume now flows directly between large content providers, data center / CDNs and consumer networks. We also show significant changes in Internet application usage, including a global decline of P2P and a significant rise in video traffic. We conclude with estimates of the current size of the Inter- net by inter-domain traffic volume and rate of annualized inter-domain traffic growth. Categories and Subject Descriptors: C.2 [Computer Communication Networks]: Miscellaneous General Terms: Measurement. 1. INTRODUCTION Saying the Internet has changed dramatically over the last five years is clich´ e – the Internet is always changing dramatically: fifteen years ago, new applications ( e.g., the web) drove widespread consumer interest and Internet adop- tion. Ten years ago, new backbone and subscriber access technologies (e.g., DSL/Cable broadband) significantly ex- panded end-user connections speeds. And more recently, ap- plications like social networking and video ( e.g., Facebook and YouTube) again reshaped consumer Internet usage. But beyond the continued evolution of Internet protocols and technologies, we argue the last five years saw the start of an equally significant shift in Internet inter-domain traffic demands and peering policies. For most of the past fifteen years of the commercial Internet, ten to twelve large tran- sit providers comprised the Internet “core” interconnecting thousands of tier-2, regional providers, consumer networks Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise, to republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. SIGCOMM’10, August 30–September 3, 2010, New Delhi, India. Copyright 2010 ACM 978-1-4503-0201-2/10/08 ...$10.00. and content / hosting companies. Textbook diagrams of the Internet and research publications based on active probing and BGP routing table analysis generally produce logical Internet maps similar to Figure 1a [1]. This diagram shows a strict hierarchy of global transit providers at the core in- terconnecting smaller tier-2 and regional / tier-3 providers.
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