A Method of Setting the QoS supported bi-directional Tunnel and distributing L2 VPN membership Information for L2VPN using LDP-extension

The present invention two layers the VPN (L2VPN; Layer 2 Virtual Private Network) label distribution protocol to the service provider; by extending the (LDP Label Distribution Protocol) enhance the two-layer ease and efficiency of the VPN service management and customer network quality of service (QoS), the present invention relates to continuous QoS support with the extension of label distribution protocol, which provides a two-layer VPN bidirectional tunnel setup and configuration information distribution method provided. The invention To this end, a virtual private network to manage the large number of PE information in the VPN provider equipment (PE), a number of the VPN client unit (CE) and a plurality of virtual private network (VPN) connected to the PE domain name service (VPN DNS) in MPLS-based L2VPN service delivery network that includes a server, a virtual private network provider equipment (PE) to provide layer 2 virtual private network (L2VPN) services must register the relevant information to the VPN DNS server , the expanded label for QoS support bidirectional tunnel configuration uses a distributed protocol with QoS support layer 2 virtual private network, a label distribution protocol extensions for configuration information distribution. The VPN client unit (CE), we need for this second layer the function of only providing simple two-layer connection for the VPN service.