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On the Impact of Layer-2 on Node Degree Distribution
Mérindol, Pascal; Donnet, Benoît; Bonaventure, Olivier et al.
2010In 10th annual conference on Internet measurement
Peer reviewed
 

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Keywords :
Network topology; mrinfo; degree distribution; layer 2
Abstract :
[en] The Internet topology data collected through traceroute exploration has been extensively studied in the past. In particular, a remarkable property of the Internet, the power-law shape of node degree distribution, drew the attention of the research community. Several studies have since questioned this property. In this paper, based on a large dataset collected using mrinfo, we show that the node degree distribution is strongly impacted by the presence of layer-2 (L2) networks, such as switches. L2 devices interconnect a large number of routers, themselves being also involved in multiple L2 interconnec- tions. Such a situation induces nodes with very high degree when analyzing the layer-3 (L3) graph with traceroute probing. Considering the physical design of a network, our analysis provides a lower bound on the bias generated by using only an L3 view. We also provide a model that can be a first step towards L2 aware topology generation.
Disciplines :
Computer science
Author, co-author :
Mérindol, Pascal
Donnet, Benoît  ;  Université Catholique de Louvain - UCL > ICTEAM > INL
Bonaventure, Olivier
Pansiot, Jean*-Jacques
Language :
English
Title :
On the Impact of Layer-2 on Node Degree Distribution
Publication date :
November 2010
Event name :
ACM/USENIX IMC
Audience :
International
Main work title :
10th annual conference on Internet measurement
Peer reviewed :
Peer reviewed
Available on ORBi :
since 04 January 2012

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