Patent ID: 6883034
Filing Date: 2005-04-19
Classification: H04L

Abstract:
1. A method of analysis of access list subsumption in routing devices of an actual or planned routed computer network, comprising: producing structured data in electronic memory which includes respective stored router names and respective stored access lists which respectively include elements with address/mask pairs, and wherein said structured data associates respective access lists with respective router names; determining whether respective access lists in the structured data include two or more elements in which a first element in the access list has a more general or equal address/mask pair than a second element in the access list, wherein the respective access lists are structured such that the first element is encountered prior to the second element during typical processing of the respective access lists; and storing in electronic memory a report of access list elements in which a first element in the access list has a more general or equal address/mask pair than a second element in the access list.