Method for implementing access dynamic updating of virtual dial-up access network

Abstract

A method for updating the cut-in of VPDN dynamically comprises after detecting some faults in a master network server, the wideband accessing server of the said aggregation layer removes the tunnel connection with the master network server. The wideband accessing server transmits a tunnel connection estabilishing request to an backup network server according to the network server configuration information acquired by the authentication of a wideband VPDN subscriber. After receiving a network negotiation protocol message, the wideband accessing server of the said aggregation layer uses a localPPP to record an IP address assigned by the backup network server. The communication message of the subsequent wideband VPDN subscriber have been mapped between the a PPP port and the IP address, andthen uses the L2TP to set up the tunnel connection. The method improves the reliability and QoS of the VPDN subscriber access connection, and reduces tunnel working load of the wideband cut-in server.

Description

technical field [0001] The present invention relates to a method for maintaining and managing broadband virtual dial-up access network (Virtual Private Dial-Network, hereinafter referred to as vpdn) service in the communication field, and specifically relates to a broadband access network providing dynamic refresh of broadband vpdn service The method of the service. Background technique [0002] The broadband vpdn network structure in the prior art is divided according to access layer, aggregation layer and backbone layer, such as figure 1 As shown, the broadband vpdn access network is composed of a vpdn user access network, a broadband access server LAC at the convergence layer and an LNS server connected to the public IP network. Broadband user authentication, authorization and billing, L2TP tunnel service selection and other access services are mainly completed by the broadband access server in the network, and LNS completes L2TP tunnel termination and vpdn user private ...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the event of establishing a tunnel connection between the LAC and the backup LNS must be triggered by the vpdn user's call again, which will cause the interruption of the vpdn user's communication and require the user to repeat the negotiation process of the ppp call many times

Even if multiple LNS servers are configured on the enterprise network, the user cannot realize the dynamic tunnel server selection function, and in this way, every time a vpdn user initiates a new call, the LAC always needs to communicate with the abnormal primary LNS first. Establish a tunnel connection and establish a tunnel connection with the standby LNS after the establishment fails. This not only consumes LAC and network communication resources, but also causes low efficiency in processing user vpdn call connections. In the case of a large number of vpdn users, in this case more serious

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