ABSTRACT
This paper examines the network inter-domain routing information exchanged between backbone service providers at the major U.S. public Internet exchange points. Internet routing instability, or the rapid fluctuation of network reachability information, is an important problem currently facing the Internet engineering community. High levels of network instability can lead to packet loss, increased network latency and time to convergence. At the extreme, high levels of routing instability have lead to the loss of internal connectivity in wide-area, national networks. In this paper, we describe several unexpected trends in routing instability, and examine a number of anomalies and pathologies observed in the exchange of inter-domain routing information. The analysis in this paper is based on data collected from BGP routing messages generated by border routers at five of the Internet core's public exchange points during a nine month period. We show that the volume of these routing updates is several orders of magnitude more than expected and that the majority of this routing information is redundant, or pathological. Furthermore, our analysis reveals several unexpected trends and ill-behaved systematic properties in Internet routing. We finally posit a number of explanations for these anomalies and evaluate their potential impact on the Internet infrastructure.
- 1.P, Bloomfield, "Fourier Analysis of Time Series: An Introduction," John Wiley ~z Sons, New York. 1976.]]Google Scholar
- 2.tt.-W. Braun, P. S. Ford and Y. Rekhter, "CIDR and the Evolution of the Internet,' SDSC Report GA- A21364, in Proceedings o/INET'93, Republished in ConneXions Sep 1993 (InterOp93 version).]]Google Scholar
- 3.B. Chinoy, "Dynamics of Interne~ Routing Informationf in Proceedings of A GM SIGCOMM '95, pp. 45- 52, September 1993.]] Google ScholarDigital Library
- 4.D. Estrin, Y. Rekhter, and S. Hotz, "A Scalable interdomain Routing Architecture," in Proceedings of the A CM $IGCOMM '92, pp. 40-52, Baltimore, MD, August, 1992.]] Google ScholarDigital Library
- 5.S. Floyd, and V. Jacobson, "The Synchronization of Periodic Routing Messages," IEEE/A CM Transactions on Networking, V.2 N.2, p. 122-136, April 1994.]] Google ScholarDigital Library
- 6.R. Govindan and A. Reddy, ~An Analysis of Inter- Domain Topology and Route Stability," in Proceedings of the IEEE INFOCOM '97, Kobe, Japan. April 1997.]] Google ScholarDigital Library
- 7.J. Honig, D. Katz, M. Mathis, Y. Rekhter, and J. Yu, `~Application of the Border Gateway Protocol in the Internet,' RFC-1164, June 1990.]] Google ScholarDigital Library
- 8.Internet Performance Measurement and Analysis project (IPMA), http://www.merit.edu/ipma.]]Google Scholar
- 9.C. Labovitz, ~Multithreaded Routing Toolkit," Merit Technical Report, 1996.]]Google Scholar
- 10.C. Labovitz, NANOG presentation, Washington, D.C., May 1996.]]Google Scholar
- 11.Dave O'Leary, Cisco Systems, Inc. Private communication, January 1997.]]Google Scholar
- 12.K. Lougheed and Y. Rekhter, "A Border Gateway Protocol (BGP),', RFC-1163 June 1990.]] Google ScholarDigital Library
- 13.B. Metcalf, "Predicting the internet's CatastropMc Collapse and Ghost Sites Galore in 1996,' Info World, December 4, 1995.]]Google Scholar
- 14.Merit :Joint Technical Staff mail archives, http://www.merit.edu/mjts/msg00078.html.]]Google Scholar
- 15.MFS Communications Mae-East Statistics Page, http://ww~.mf~t.com/MA~/~s~.st~ts.ht~.]]Google Scholar
- 16.North American Network Operators Group, http://www.nanog.org.]]Google Scholar
- 17.V. Paxson, "End-to-End Routing Behavior in the Internet," in Proceedings of the A CM SIGCOMM '96, Stanford, C.A., August 1996.]] Google ScholarDigital Library
- 18.Y. Rekhter, "Scalable Support for Multi-homed Multi- Provider Connectivity," NAN OG, Ann Arbor, MI. October 1996.]]Google Scholar
- 19.Y. Rekhter and C. Topolcic, ``Exchanging Routing Information Across Provider Boundaries in the CIDR Environment,' RFG-1520. September 1993.]] Google ScholarDigital Library
- 20.Routing Arbiter web pages, http://www.ra.ne~;.]]Google Scholar
- 21.K. Varadhan, R. Govindan, and D. Estrin, "Persistent Routing Oscillations in Inter-Domain Routing," USC/ISI, Available at the Routing Arbiter project's homepage at USC/ISI.]]Google Scholar
- 22.C. Villamizer, R. Chandra, and R. Govindan, "draftietf-idr-route-dampen-00-previevf', Internet Engineering Task Force Draft, July 21, 1995.]]Google Scholar
- 23.C. Villaxnizer, ``TCP Response Under Loss Conditions", NANOG Presentation, San Francisco, February 1997.]]Google Scholar
Index Terms
- Internet routing instability
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