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During the last few years, more and more of the medium-to-large Internet eXchange Points (IXP) around the world have started to operate a route server and offer its use as a free value-added service to their members. This service has greatly simplified inter-domain routing for those members and has made it easy for them to peer with possibly hundreds of networks at those IXPs from the get-go.

In this paper, we report on an empirical analysis that is based on a unique collection of IXP-provided datasets from two different European IXPs that operate a route server and gave us access to a wealth of route server-specific BGP data. Both IXPs also made the traffic datasets that they routinely collect from their public switching infrastructures available to us. Using this information, we perform a first-of-its-kind study that correlates a detailed control plane view with a rich data plane view to reason about the different peering …