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This paper argues that the scalability problems of the Internet could be solved, not only in the control plane, but also in the forwarding plane. To this end, an explicit forwarding scheme is presented. The authors' scheme alleviates the Internet routing scalability problem, and facilitates fast forwarding, enforcement of fine-grained ISP transit policies, and stateless multicast, while still retaining the robustness of hop-by-hop forwarding. Internet scalability is threatened by large scale multi-homing. To address this issue, recent proposals remove the ability of end user sites to "Resemble" ISPs in the Border Gateway Protocol (BGP) routing system.
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