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| Reference : Revealing MPLS Tunnels Obscured from Traceroute |
| Scientific journals : Article | |||
| Engineering, computing & technology : Computer science | |||
| http://hdl.handle.net/2268/124315 | |||
| Revealing MPLS Tunnels Obscured from Traceroute | |
| English | |
Donnet, Benoît  [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Algorithmique des grands systèmes >] | |
| Luckie, Matthew [ > > ] | |
| Mérindol, Pascal [ > > ] | |
| Pansiot, Jean-Jacques [ > > ] | |
| Apr-2012 | |
| Computer Communication Review | |
| ACM Special Interest Group on Data Communication | |
| 42 | |
| 2 | |
| 87-93 | |
| International | |
| 0146-4833 | |
| 1943-5819 | |
| New York | |
| NY | |
| [en] taxonomy ; traceroute ; MPLS ; toplogy | |
| [en] Operators have deployed Multiprotocol Label Switching (MPLS) in the Internet for over a decade. However, its impact on Internet topology measurements is not well known, and it is possible for some MPLS configurations to lead to false router-level links in maps derived from traceroute data.
In this paper, we introduce a measurement-based classification of MPLS tunnels, identifying tunnels where IP hops are revealed but not explicitly tagged as label switching routers, as well as tunnels that obscure the underlying path. Using a large-scale dataset we collected, we show that paths frequently cross MPLS tunnels in today's Internet: in our data, at least 30% of the paths we tested traverse an MPLS tunnel. We also propose and evaluate several methods to reveal MPLS tunnels that are not explicitly flagged as such: we discover that their fraction is significant (up to half the explicit tunnel quantity) but most of them do not obscure IP-level topology discovery. | |
| http://hdl.handle.net/2268/124315 |
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