Patent ID: 8154993
Filing Date: 2012-04-10
Classification: H04L

Abstract:
1. A method for providing one or more alternative paths between two routing domains in a packet-oriented network, comprising the steps of: receiving data related to a failed link in one of the routing domains in an inter-domain router; determining, via the inter-domain router, at least one alternative path to a destination which runs via the failed link; notifying routing domains situated on the alternative path of the determination; adjusting, via the notified routing domains, inter-domain routing in line with routing to the destination along the alternative path until all the routing domains on the alternative path have adjusted their inter-domain routing; wherein, if no alternative path is determined in the router, a request message is sent to at least one neighboring inter-domain router requesting the conveyance of information about at least one alternative path, and if a neighboring alternative path is determined in the neighboring interdomain router, the neighboring alternative path is communicated to the interdomain router using a response message.