Implementation of inter-domain path computation element

The Path Computation Element (PCE) Working Group (WG) at the Internet Engineering Task Force (IETF) is chartered to specify a PCE-based architecture for the path computation of inter-domain MPLS/GMPLS-based traffic engineered Label Switched Paths (LSPs). The PCE architecture introduces a special computational entity that will corporate with similar entities to compute the best possible path through single or multiple domains. This paper presents the state-of-the-art in PCE and several topics (e.g. PCE discovery mechanism, inter-domain path computation). In this paper, we describe the details about our PCE implementation.