Topology aware overlay networks

14 years 4 months ago

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— Recently, overlay networks have emerged as a means to enhance end-to-end application performance and availability. Overlay networks attempt to leverage the inherent redundancy of the Internet’s underlying routing infrastructure to detour packets along an alternate path when the given primary path becomes unavailable or suffers from congestion. However, the effectiveness of these overlay networks depends on the natural diversity of overlay paths between two endhosts in terms of physical links, routing infrastructure, administrative control, and geographical distribution. Several recent studies realized that a measurable number of path outages were unavoidable even with use of such overlay networks. This stems from the fact that overlay paths might overlap with each other when overlay nodes are selected without considering the underlying topology. An overlay network’s ability to quickly recover from path outages and congestion is limited unless we ensure path independence at the ...

Junghee Han, David Watson, Farnam Jahanian

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