Building an MPLS-TP simulator

2010

This document specifies an architectural framework for the application of Multiprotocol Label Switching (MPLS) to the construction of packet-switched transport networks. It describes a common set of protocol functions --the MPLS Transport Profile (MPLS-TP) --that supports the operational models and capabilities typical of such networks, including signaled or explicitly provisioned bidirectional connection-oriented paths, protection and restoration mechanisms, comprehensive Operations, Administration, and Maintenance (OAM) functions, and network operation in the absence of a dynamic control plane or IP forwarding support. Some of these functions are defined in existing MPLS specifications, while others require extensions to existing specifications to meet the requirements of the MPLS-TP. This document defines the subset of the MPLS-TP applicable in general and to point-to-point transport paths. The remaining subset, applicable specifically to point-to-multipoint transport paths, is outside the scope of this document.

Looking to the access, aggregation and core parts of the current telecommunication networks a wide spectrum of transport technologies is applied by the carriers. In one hand, it is because of the intention to save the already exist- ing investments in legacy networks, but on the other hand the new broadband and interactive services often require new technologies to implement in the network immediately. In the new era of Carrier Ethernet services and the devel- opment of high-fashion applications less attention is paid for the underlying transport infrastructure. In this article we demonstrate the importance of transport infrastructure de- sign to the performance of end-to-end Carrier Ethernet ser- vices. We mainly focus on the core segment to perform availability analysis of the recent transport network archi- tectures, but we also illustrate the end-to-end service per- formance by analyzing case studies on real network imple- mentations.

2007

This paper provides an overview of Multi-Protocol Label Switching Technology (MPLS). Distinctive issues are presented as well as Quality of Service (QoS). Traffic Engineering (TE) features are discussed. It also describes current network trends where Internet Protocol (IP) is the predominant technology and points out the advantages of MPLS for data, voice, and video information transport.

2018

The tremendous growth and requirements for service quality, tenability, and efficiency have made traffic engineering an essential consideration in the design and operation of large public Internet backbone networks. Traffic engineering is the aspect of Internet network engineering that deals with the problem of operation analysis and operation optimization of functional IP networks. The principal target of internet traffic engineering is to direct the packets of IP traffic through a given system in an efficient and speedy manner conceivable. This paper explores the role of signaling protocols for traffic engineering in MPLS and provides a comparative analysis of non-MPLS and MPLS networks for substantial traffic situations. The simulation of the proposed solution has been performed in OPNET environment and the simulation results prove enhanced network performance of MPLS.

2002

In this paper, we explain the design philosophy and the overall architecture of a scalable discrete event network simulator for GMPLS-based Optical Internet, called GLASS (GMPLS Lightwave Agile Switching Simulator). GLASS has been developed to support the R&D works in the area of Next Generation Internet (NGI) networking with GMPLS-based WDM optical network, and Internet traffic engineering with DiffServ-over-MPLS. It supports discrete-event simulations of various 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, link/node failure model, and fast restoration from an optical link failure. The NIST GLASS is implemented with Java programming language on the SSFNet (Scalable Simulation Framework Network) simulation platform. It has been designed and implemented with open interfaces to support future expansions or replacements of protocol modules by users. It also provides DML description input file interface to support the users' flexible definition and modification of simulation parameters and configuration of protocol modules. The simulation outputs are generated in text file format that can be used by Excel to produce various graph or charts. Recently, a GUI-based topology and simulation creator has been developed to support a visual environment from which one can configure and run the simulator.

2012 IX International Symposium on Telecommunications (BIHTEL)

The paper describes the design goals and methodology in creating a new model of optical telecommunication network. The model is implemented by discrete-event network simulator ns-3. The advantages of using the existing simulator core infrastructure provided by ns-3 are analyzed and compared to building own simulator from scratch, or selecting a tool among other existing simulators such as ns-2, OMNeT++, and OPNET. The requirements for feature functionality are outlined and high-level overview of the model architecture and its components are provided. Finally, the possibilities for extending the model in future research and development work are described.

Computer Communications, 2010

The volume of network traffic, notably of data traffic, grows continuously and tremendously during recent years with the appearance of new value-added services such as video on demand, interactive video conferencing, peer to peer data sharing, etc. Faced with this challenge, traditional circuit-switched networks become inappropriate and costly. On the other side, optical packet-switched networks, which support best data traffic thanks to their high flexibility, capacity, and cost-efficiency, appear the most appropriate candidate. To optimise the transmission efficiency of packets in optical networks, a new technology, Modified Packet Bursting (MPB), has been studied in the framework of a metropolitan optical packet bus-based network. Also, in order not to degrade the quality of classical circuit-switched Time Division Multiplexing (TDM) services, which still stay the major revenues of telecom operators today, Circuit Emulation Service (CES) on packet-switched networks has been investigated by main standard organizations. This paper presents the performance analysis of the above two technologies applied to a metropolitan optical packet bus-based network. It specially demonstrates the improvement of CES performance thanks to MPB features.

2018

The Multi-Protocol Label Switching (MPLS) protocol has contributed to the Internet routing, traffic engineering and quality of service required for new services. It would be interesting to compare the QoS performance of MPLS and MPLS / DiffServ networks, taking into account their particular constraints. In this article, we evaluated the QoS performance metrics such as delay variation, delay, response time, throughput for different traffic types (voice, data and video) for both platforms MPLS and MPLS / DiffServ. The objective is to compare the performance of MPLS and MPLS / DiffServ using "OPNET Modeler v14.5" using the latest simulation techniques, where different QoS parameters can be measured to compare the performance of networks. Our approach in this work is to design and build an operator network typebackbone to simulate a real scenario that conveys different types of traffic (voice, data and video). The results of the work are presented according to the simulation t...

MultiProtocol label switching (MPLS) is the new means to take care of the fastest growing communication network to enhance the speed, scalability and service provisioning capabilities. In order to optimize the use of transmission resources, MPLS carries differentiated services across the Internet through a virtual path capability between packet (label) switches. MPLS also has the capabilities to engineer traffic tunnels by avoiding congestion and utilizing all available bandwidth with an efficient manner. The core value of MPLS is followed by the comparison of MPLS network with the existing network and MPLS signaling protocols: constrained based label distribution protocol (CR-LDP), resource reservation protocol (RSVP) and traffic extension RSVP (RSVP-TE) maintaining the quality of service (QoS) parameters and their performance analysis as well. In such context, a full comprehensive simulation environment is created for a conventional network and MPLS applied over that traditional network to evaluate the comparative performance of network traffic behavior and the functionalities of MPLS signaling protocols as well. Finally, the results are evaluated and analyzed, and their behaviors are shown by means of graphical manner.

A network may comprise multiple layers. It is important to globally optimize network resource utilization, taking into account all layers rather than optimizing resource utilization at each layer independently. This allows better network efficiency to be achieved through a process that we call inter-layer traffic engineering. The Path Computation Element (PCE) can be a powerful tool to achieve inter-layer traffic engineering. This document describes a framework for applying the PCE-based architecture to inter-layer Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS) traffic engineering. It provides suggestions for the deployment of PCE in support of multi-layer networks. This document also describes network models where PCE performs inter-layer traffic engineering, and the relationship between PCE and a functional component called the Virtual Network Topology Manager (VNTM). Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.