The method and router for selecting the current backup route

Abstract

The invention discloses a method for selecting a current backup route and a router, and belongs to the field of communication networks. The method comprises the following steps of: acquiring a primary route and a plurality of to-be-selected backup routes; determining an optimal to-be-selected backup route from the plurality of to-be-selected backup routes, wherein superposed nodes between a forwarding path corresponding to the optimal to-be-selected backup route and a forwarding path corresponding to the primary route are fewest; and configuring the optimal to-be-selected backup route as the current backup route. The router comprises an acquisition unit, a to-be-selected backup route selecting unit and a backup route configuration unit. According to the embodiment, the to-be-selected backup route with fewest nodes superposed with the forwarding path corresponding to the primary route is used as the current backup route when the current backup route is selected, so that when the forwarding path corresponding to the primary route fails, simultaneous failure of the primary and backup paths because the primary and backup paths have the superposed nodes can be furthest avoided, and security of the backup routes and guarantee of services are improved.

Description

technical field [0001] The invention relates to the field of communication networks, in particular to a method for selecting a current backup route and a router. Background technique [0002] On a traditional IP network, due to the influence of various factors, the underlying fault may occur on the forwarding link. When forwarding equipment such as a router detects such a fault, it will notify the upper-layer routing system to update the routing database and recalculate the route. Some routing protocols may also need to wait for the refresh of the topology state in the entire network to complete new route calculations. Usually, it takes several hours between the occurrence of a link failure and the completion of route convergence (reselecting an available route) by the routing system. seconds of time. For some services on the network that are very sensitive to delay and packet loss, the second-level convergence time is unbearable, which will lead to the interruption of cur...

AI Technical Summary

Problems solved by technology

[0004] When the selected primary path and backup path have overlapping forwarding links or nodes, once the overlapping forwarding link or node fails, both the active and standby paths will fail, making the FRR function unavailable and seriously affecting the business

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