METHOD, PATH COMPUTATION ELEMENT AND SYSTEM FOR OBTAINING PATH

摘要

A method, path computation element and system for obtaining a path are provided, and the method includes: at least two path computation domains between a path computation initial domain and a path computation termination domain perform the interactive computing to obtain the paths between two end nodes, wherein at least one path computation domain obtains the path information of a first path, according to the obtained path information of the first path, computes and generates the path information for computing a second path and sends the path information to the next path computation domain. The path information for computing the second path includes: the path information of the path between two boundary nodes, wherein one boundary node is the node the first path passes.