Method of obtaining information representative of an availability, a device for obtaining information, and a corresponding computer program

摘要

A method is provided of obtaining information representative of an availability of a communications network, which includes a plurality of equipment exchanging routing data in accordance with a routing protocol. The method includes a stage of storing in chronological order at least some of the routing data exchanged between at least one first equipment and at least one second equipment; a stage of totaling unavailability times as a function of the routing data stored in chronological order for a predetermined time period; a stage of obtaining the information representative of an availability for the time period as a function of the totaled unavailability times.

主权项

1. A method of obtaining information representative of an availability of a communications network comprising a plurality of routing equipment, including at least one first routing equipment and at least one second routing equipment, exchanging routing data in accordance with a routing protocol, wherein the method is carried out by a member of the plurality of routing equipment of said communication network and comprises:
a stage of storing in computer-readable memory in chronological order at least some of said routing data exchanged between the at least one first routing equipment of said communication network and the at least one second routing equipment of said communication network, wherein said at least some routing data comprises link-state packets setting up and maintaining neighbor information between neighboring ones of the plurality of routing equipment belonging to said communications network and enabling to define transmission paths between the at least one first routing equipment and the at least one second routing equipment belonging to said communications network; a stage of totaling unavailability times as a function of said routing data stored in chronological order for a predetermined time period, wherein said totaling stage comprises: a step of determining at least some available paths of said communications network at the start of said time period; for each of the paths previously determined, a step of totaling said unavailability times comprising:
summing a fixed unavailability time when a path between a source and a destination changes following a link loss; andsumming a variable unavailability time if routing between a source and a destination is impossible, corresponding to an unavailability time determined using said data stored in chronological order; and a stage of obtaining said information representative of an availability for said time period with a processor as a function of said totaled unavailability times.