Investigating the Potential of the Inter-IXP Multigraph for the   Provisioning of Guaranteed End-to-End Services
  In this work, we propose utilizing the rich connectivity between IXPs and ISPs for inter-domain path stitching, supervised by centralized QoS brokers. In this context, we highlight a novel abstraction of the Internet topology, i.e., the inter-IXP multigraph composed of IXPs and paths crossing the domains of their shared member ISPs. This can potentially serve as a dense Internet-wide substrate for provisioning guaranteed end-to-end (e2e) services with high path diversity and global IPv4 address space reach. We thus map the IXP multigraph, evaluate its potential, and introduce a rich algorithmic framework for path stitching on such graph structures. 
Vasileios Kotronis, Rowan Kloti, Matthias Rost, Panagiotis   Georgopoulos, Bernhard Ager, Stefan Schmid and Xenofontas Dimit...
cs.NI