Importance

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Abstract

The present disclosure provides a method, switch and system for updating a route, relating to computer network technologies. The method comprises detecting, by a current device, link states of at least two neighbor devices; when the current device detects that a link state of a first neighbor device is unreachable, setting, by the current device, a state of a routing item with an initial state being reachable among all routing items corresponding to the first neighbor device in an internal routing table to be unreachable; and detecting, by the current device, whether states of all routing items corresponding to each target subnet in the internal routing table are all unreachable, respectively; if yes, sending a route updating message to another neighbor device except the first neighbor device. According to the present disclosure, when detecting the neighbor device is broken, the current device directly updates the internal routing table without any calculation and notifies another neighbor device to update the internal routing table, so that the switch only needs to simply make a logical judgment to achieve route updating.

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First Claim