Reference : Quantifying ASes Multiconnectivity Using Multicast Information
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Computer science
Quantifying ASes Multiconnectivity Using Multicast Information
Mérindol, Pascal [> > > >]
Van den Schriek, Virginie [> > > >]
Donnet, Benoît mailto [Université Catholique de Louvain - UCL > ICTEAM > INL > >]
Bonaventure, Olivier [> > > >]
Pansiot, Jean-Jacques [> > > >]
9th ACM SIGCOMM Conference on Internet Measurement
[en] network topology ; mrinfo ; ASes connectivity ; multicast
[en] Redundant connectivity (or multiconnectivity) between adjacent autonomous systems (ASes) is important for inter-domain traffic engineering and fast recovery in case of failures. However, the redundancy of ASes business relationship links has not been quantitatively studied, mainly due to the difficulty of obtaining relevant data. In this paper, we show that the mrinfo multicast monitoring tool can provide useful data about the Internet topology and such redundant links in particular. Our analysis relies on more than four years of daily queries to about ten thousand routers mapped into more than two hundred ASes. We demonstrate that peering links between ASes are frequently redundant. In particular, our analysis shows that more than half of the studied ASes pairs are connected through multiple physical links. We then refine our analysis by considering the different types of ASes and their business relationships. A particular result of our analysis is that at least 75% of the peer-to-peer relationships between adjacent Tier-1 ASes are redundant, i.e., the con- nections between these ASes involve several physical links. Our analysis is conservative, providing so a lower bound, as some links might not be seen by mrinfo due to ISPs filtering policies.

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