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MPLS-based recoveryMüller, Karen E 12 1900 (has links)
Thesis (MSc)--Stellenbosch University, 2003. / ENGLISH ABSTRACT: MPLS-based recovery is intended to effect rapid and complete restoration of traffic affected by a fault
in a Multiprotocol Label Switching (MPLS) network. Two MPLS-based recovery models have been
proposed: lP re-routing which establishes recovery paths on demand, and protection switching which
works with pre-established recovery paths. lP re-routing is robust and frugal since no resources are
pre-committed but it is inherently slower than protection switching which is intended to offer high
reliability to premium services where fault recovery takes place at the 100 ms time scale.
This thesis presents an overview of various recovery techniques and addresses the problem of how to
find an in some sense optimal set of pre-established traffic engineered recovery paths, given a network
with link capacities and traffic demands.
We present and motivate our choice of a nonlinear objective function and optimization method for
finding traffic engineered working and recovery paths. A variant of the flow deviation method is used
to find and capacitate a set of optimal label switched paths. We present and evaluate two simple
methods for computing a set of pre-established traffic engineered recovery paths by using the flow
deviation method. / AFRIKAANSE OPSOMMING: MPLS-gebaseerde herstel is daarop gemik om verkeer wat deur 'n fout in 'n Multiprotokol Etiketwisseling
(Multiprotocol Label Switching) (MPLS) netwerk geaffekteer is, vinnig en volledig te herstel.
Twee MPLS-gebaseerde herstelmodelle is voorgestel: Internetprotokol-herroetering (lP rerouting)
wat herstelpaaie op aanvraag tot stand bring, en beskermingsoorskakeling (protection switching)
wat met voorafbeplande herstelpaaie werk. IP-herroetering is robuust en voordelig aangesien
geen netwerkbronne vooraf gereserveer word nie, maar dit is inherent stadiger as beskermingsoorskakeling
wat veronderstel is om 'n hoë graad van betroubaarheid aan belangrike dienste te bied waar die
herstel van foute in die 100 ms tydskaal plaasvind.
Hierdie tesis verskaf 'n oorsig oor verskeie hersteltegnieke en ondersoek die probleem hoe om 'n
optimale versameling van voorafbeplande herstelpaaie te vind, gegee 'n netwerk met skakelkapasiteite
(link capacities) en verwagte netwerkverkeer.
Ons stel voor en motiveer ons keuse van 'n nie-lineêre objekfunksie en optimeringsmetode om verkeersontwerpde
(traffic engineered) aktiewe en herstelpaaie te vind. 'n Variant van die vloeideviasie
(flow deviation)-metode word gebruik om 'n optimale versameling van etiketwisseling (label
switched) paaie te vind en om 'n optimale hoeveelheid kapasiteit aan die paaie toe te ken. Ons stel
voor en evalueer twee eenvoudige metodes om 'n versameling van optimale voorafbeplande herstelpaaie
te bereken deur die vloeideviasie-metode toe te pas.
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Migración e implementación hacia una red MPLS-VPN aplicado a una entidad empresarial en la ciudad de LimaCastillo Meza, Joel Omar January 2015 (has links)
En la presente tesina se realiza una descripción de la tecnología de Conmutación Multi-Protocolo mediante etiquetas usando una red privada virtual para la comunicación de una entidad empresarial. Se realizó una descripción de la tecnología MPLS con VPN mostrando sus cualidades, ventajas y desventajas, se promueve la esta tecnología a la red de comunicación de datos de la empresa tenga un performance y confidencialidad en los datos transmitidos, diseñando un esquema así como la infraestructura que podría ser usada en esta implementación, con características modulares las cuales permitirá a la empresa ir creciendo a la medida de que su tráfico o demanda de transporte vaya aumentando al igual que la integración de las demás extensiones se amerita el caso; para el diseño nos ayudaremos del programa de simulación “GNS3” el mismo que se hará un bosquejo de la configuración y modelo para la transmisión de sucursal a matriz y viceversa.
This thesis is a description of MPLS VPN using a communication from the business entity. Was a description of MPLS VPN showing his qualities, advantages and disadvantages, promotes the introduction of this technology to the data communication network of the company to have a performance traffic and confidentiality of the data transmitted, designing scheme as well as the infrastructure that could be used in this implementation, modular features which allow the company to grow to the extent that their traffic and transport demand will increase as the integration of other extensions are merited case, to help us design simulation program "GNS3" the same to be made a sketch of the model configuration and transmission branch to parent and vice versa.
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Performance Evaluation of Voice Traffic over MPLS Network with TE and QoS ImplementationKharel, Jeevan, Adhikari, Deepak January 2011 (has links)
Multiprotocol Label Switching (MPLS) is a new paradigm in routing architectures which has changed the way Internet Protocol (IP) packet is transferred in a Network. MPLS ensures the reliability of the communication minimizing the delays and enhancing the speed of packet transfer. One important feature of MPLS is its capability of providing Traffic Engineering (TE) which plays a vital role for minimizing the congestion by efficient load, balancing and management of the network resources. The performance evaluation is done considering the network parameters latency, jitter, packet end to end delay, and packet delay variation. Integration of QoS with the MPLS-TE network may enhance the performance of the network. Various scheduling algorithms can be used for implementing QoS on a network, which may vary the performance of the network. In our study, QoS is implemented on top of the MPLS-TE network using Differentiated Service (DiffServ) architecture. Different basic scheduling algorithms are used for the implementation of QoS and to check their impact on the network and to identify the suitable one among them. Performance evaluation is done considering the network parameters latency, jitter, packet end-to-end delay, and Packet Delay Variation. The simulation was done using OPNET modeler 16.0 and the results were analyzed. The simulation result shows that using TE along with QoS in MPLS network decreases the latency, jitter, packet delay variation and end to end packet delay compared to using TE alone for voice traffic. / +46738732963
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OPNET simulation of voice over MPLS With Considering Traffic EngineeringRadhakrishna, Deekonda, Keerthipramukh, Jannu January 2010 (has links)
Multiprotocol Label Switching (MPLS) is an emerging technology which ensures the reliable delivery of the Internet services with high transmission speed and lower delays. The key feature of MPLS is its Traffic Engineering (TE), which is used for effectively managing the networks for efficient utilization of network resources. Due to lower network delay, efficient forwarding mechanism, scalability and predictable performance of the services provided by MPLS technology makes it more suitable for implementing real-time applications such as voice and video. In this thesis performance of Voice over Internet Protocol (VoIP) application is compared between MPLS network and conventional Internet Protocol (IP) network. OPNET modeler 14.5 is used to simulate the both networks and the comparison is made based on some performance metrics such as voice jitter, voice packet end-to-end delay, voice delay variation, voice packet sent and received. The simulation results are analyzed and it shows that MPLS based solution provides better performance in implementing the VoIP application. In this thesis, by using voice packet end-to-end delay performance metric an approach is made to estimate the minimum number of VoIP calls that can be maintained, in MPLS and conventional IP networks with acceptable quality. This approach can help the network operators or designers to determine the number of VoIP calls that can be maintained for a given network by imitating the real network on the OPNET simulator. / 0046737675303
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