Discrete Event Simulation of the DiffServ-over-MPLS with NIST GMPLS Lightwave Agile Switching Simulator (GLASS)

In this paper, we explain the discrete event network simulation for DiffServ-aware-MPLS on the GMPLS-based WDM Optical Network. The simulation has been performed on the NIST GMPLS Lightpath Agile Switching Simulator (GLASS). We also briefly explain the design and implementation of the GLASS, and report the current implementation status and experimental results. The NIST GLASS has been developed to support the R&D works in the area of Next Generation Internet (NGI) networking with GMPLSbased WDM optical network and Internet traffic engineering with DiffServ-over-MPLS. It supports various discrete-event simulations of DiffServ packet classification, per-hop-behavior (PHB) processing with class-based-queuing, MPLS traffic engineering, MPLS OAM functions that provide performance monitoring and fault notification, GMPLS-based signaling for WDM optical network, fiber/lambda optical switching, link/node failure model, and fast fault detection, notification and restoration from an optical link failure. In this paper, we focus the discussions on the discrete event simulation of DiffServ-over-MPLS in NIST GLASS.