Generalized Multi-Protocol Label Switching (GMPLS) Architecture

Future data and transmission networks will consist of elements such as routers, switches, DWDM systems, Add-Drop Multiplexors (ADMs), photonic cross-connects (PXCs), optical cross-connects (OXCs), etc. that will use Generalized MPLS (GMPLS) to dynamically provision resources and to provide network survivability using protection and restoration techniques. This document describes the architecture of GMPLS. GMPLS extends MPLS to encompass time-division (e.g. SDH/SONET, PDH, G.709), wavelength (lambdas), and spatial switching (e.g. incoming port or fiber to outgoing port or fiber). The main focus of GMPLS is on the control plane of these various layers since each of them can use physically diverse data or…