METHOD FOR SETTING CONNECTION AND RESTORING FAULT OF CONNECTION FOR PROTECTING AND RESTORING CONNECTION IN MPLS NETWORK

摘要

PURPOSE: A method for setting a connection and restoring a fault of the connection for protecting and restoring the connection in an MPLS(Multi Protocol Label Switching) network is provided to efficiently make use of network resources by setting up a protection connection using former connection fault information in case that an LSP(Label Switching Path) connection fault is generated in an MPLS network, and by rapidly restoring the connection fault using an MPLS FIS(Fault Indication Signal). CONSTITUTION: Information capable of triggering a fault restoration system is received(801). It is analyzed whether the information is an LDP connection setting request(802). In case that a new LSP connection setting is requested, a connection setting response is waited(803). In case that the connection setting response is received, it is checked whether there is link information which experienced a PD fault(804). In case that there's the information, a protection connection is set up(805). In case that a PSL receives fault notifying information(806), it is checked whether the protection connection has already set up(807). In case that the protection connection has already set up, a traffic is switched(809). In case that the protection connection has not already set up, the protection connection is set up(808). After that the switching is performed(809). In case that the PSL receives fault restoration notifying information(810), the protection connection is maintained(811).