[NRG] Reminder: NRG meeting: Inferring Visibility: Who's (not) talking to... @ Mon Mar 5 11am - 12pm (NRG Calendar)

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Title: NRG meeting: Inferring Visibility: Who's (not) talking to whom?
Authors: Gonca Gursun, Natali Ruchansky, Evimaria Terzi, Mark Crovella
Presenter: Gonca Gursun

Consider this simple question: how can a network operator identify the set  
of routes that pass through its network? Answering this question is  
surprisingly hard: BGP only informs an operator about a limited set of  
routes. By observing traffic, an operator can only conclude that a  
particular route passes through its network -- but not that a route does  
not pass through its network. We approach this problem as one of  
statistical inference, bringing varying levels of additional information to  
bear: (1) the existence of traffic, and (2) the limited set of publicly  
available routing tables. We show that the difficulty depends critically on  
the position of the network in the overall Internet topology, and that the  
operators with the greatest incentive to solve this problem are those for  
which the problem is hardest. Nonetheless, we show that suitable  
application of nonparametric inference techniques can solve this problem  
quite accurately. For certain networks, traffic existence information  
yields good accuracy, while for other networks an accurate approach uses  
the `distance' between prefixes, according to a new network distance metric  
that we define. We then show how solving this problem leads to improved  
solutions for a particular application: traffic matrix completion.
When: Mon Mar 5 11am – 12pm Eastern Time
Where: MCS-148, 111 Cummington Street, Boston, MA 02215
Calendar: NRG Calendar
     * michel.machado at gmail.com - creator

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