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Deterministic, Reduced-Visibility Inter-Domain Forwarding

By Stephen D. Strowes and Colin Perkins


Inter-domain forwarding state is growing at a super-linear rate, rendering older routers obsolete and increasing the cost of replacement. A reduction of state will alleviate this problem. In this paper, we outline a new reduced-state interdomain forwarding mechanism. We carefully drop portions of the advertised forwarding state using a utility measure for prefixes based on the length of the prefix and the path length to its origin. A deterministic forwarding algorithm uses the resulting partial view. The graph of connections between autonomous systems is shallow, offering many viable paths for data flows, a property we aim to use to achieve minimal detrimental effect on delay and AS path stretch

Topics: General Terms
Year: 2011
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