Limitations and Possibilities of Path Trading between Autonomous Systems

13 years 3 months ago

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Abstract—When forwarding packets in the Internet, Autonomous Systems (ASes) frequently choose the shortest path in their network to the next-hop AS in the BGP path, a strategy known as hot-potato routing. As a result, paths in the Internet are suboptimal from a global perspective. For peering ASes who exchange trafﬁc without payments, path trading – complementary deviations from hot-potato routing – appears to be a desirable solution to deal with these inefﬁciencies. In recent years, path trading approaches have been suggested as means for interdomain trafﬁc engineering between neighboring ASes, as well as between multiple ASes to achieve global efﬁciency. Surprisingly, little is known on the computational complexity of ﬁnding path trading solutions, or the conditions which guarantee the optimality or even approximability of a path trading protocol. In this paper we explore the computational feasibility of computing path trading solutions between ASes. We ﬁrst show th...

Yuval Shavitt, Yaron Singer

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