Dynamic retrieval of routing information for inter-as te-lsps

A technique dynamic trigger traffic engineering label switching path (LSP) is a computer network terminal (remote) and volume node (e.g. end, node) and between the TE-LSP and head end communicating the AC of arrival information. The receiving retrieval information displaying method based on trigger border gateway protocol session, wherein one end of arrival node (i.e.) is in information at least a part is transmitted according to BGP to the TE-LSP termination node. , Specifically once is arranged on TE-LSP end nodes in termination node, the head end and node for example/end of the extension triggering of response signal to a node is request is arranged on the BGP session. The BGP session wherein routing information from a node transmission to the end of node. The head end node calculates is connected with the routing information from the routing terminal according node is at (. i.e, address prefix-suffix-codes and related attribute,) is inserted to the routing table in.