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In this paper the authors present a cross layer routing and congestion control scheme which can map an enterprise network into a smaller network of boarder routers. One of the boarder routers in the scheme called a main node computes the virtual link (tunnel) capacities and corresponding queue size for each path of the ingress routers. This main node can use cloud computing to speed up computation. The scheme can make clean-slate protocols easily deployable in the current Internet with out the need of making changes in the core routers. Besides, the scheme makes online dynamic network diagnosis and analysis easier.
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