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Fast convergence to topology changes is now a key requirement in routing infrastructures while reducing the routing protocol's processing overhead continues to be as important as before. In this paper, the authors examine the problem of scheduling routing table updates in link state routing protocols. Commercial routers typically use a hold time based scheme to limit the number of routing table updates as new LSAs arrive at the router. The hold time schemes limit the number of routing table updates at the expense of increased delay in convergence to the new topology, which is clearly not acceptable any more.
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