Carrier Grade Metro Ethernet Networks (original) (raw)

Deployment of an advance metropolitan gigabit Ethernet network: experience from the Attica Telecom case

Journal of Optical Networking, 2006

Since the introduction of Ethernet technology in the 1980s, Ethernet has undergone major modifications and recent advances such as the support of 10 G interfaces, the resilient packet ring (RPR) standard, the Ethernet passive optical networks (EPONs), and so on have transformed Ethernet from a dominant local area network (LAN) networking technology to a key, flexible and cost-effective networking technology for metropolitan area networks (MANs). The purpose of this paper is to assess Ethernet maturity for deployment in MANs, based on different assessment criteria such as service provisioning and delivery (scalability issues related to the media access control (MAC) addresses and the supported number of virtual LAN identifiers), network protection and restoration as well as network and service management (provisioning of Ethernet services, fault identification, and monitoring). This assessment is based on a real-case scenario of deploying an advance metropolitan gigabit Ethernet network from a network service provider in Greece, Attica Telecom.

Importance of Transport Infrastructure Design to the Performance of Carrier Ethernet Services

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.

Etherlay: An Overlay Enhancement for Metro Ethernet Networks

2006

The ubiquitous Ethernet technology has propelled itself into a wide-scale adoption for Metro Ethernet Networks (MEN). Despite recent advancements in Ethernet and commercialization of the first generation of MEN, the fundamental technology does not meet the expectations that carriers have traditionally held in terms of network resiliency and load management. This paper addresses these two issues. We propose a new concept of overlay network in the Ethernet layer, called Etherlay, that increases the resiliency of the MEN while provisioning the support for load balancing. As a result, the capacity in terms of network throughput is greatly enhanced while almost avoiding performance hits for any re-convergence in case of failures. Compared to the standard protocols, Etherlay's total throughput gain ranges from 5.93% to 20.7% in the face of failure; while load balancing capability increases an additional 16% to 60% of the total throughput.

A QoS framework for Next Generation Networks Based on Metro Ethernet

ijiee.org

Nowadays, the interest in using Metro Ethernet as the main access technology in Next Generation Networks (NGN) is ever increasing. One of the main demands of these networks is to provide Quality of Service (QoS) for multimedia and other time stringent applications. At present, several well-known technologies are used by the metro Ethernet, such as NG-SONET/SDH, VPLS, and RPR, which have been used independently so far, and none of them provides QoS. ETSI TISPAN architecture is used to provide QoS in NGN. In this paper we have used three different metro Ethernet technologies,

Evolution of Carrier Ethernet - Technology Choices and Drivers

The shift from native Ethernet in LANs to switched Ethernet in WANs has propelled efforts of making Ethernet as an ideal candidate technology for transport. Carrier Ethernet has the advantage of being able to be offered as a service to customers. Two questions that we desire to answer in this paper are (1) how Carrier Ethernet can scale as a service in the metropolitan and access premises and what are the key applications that will most benefit from such technology development. We attempt to answer the first question by first reviewing the multiple strategies adapted by vendors in deploying Carrier Ethernet. We then show how scalable Carrier Ethernet can be used for multiple service offerings, especially focusing on video distribution/SAN/mobile-backhaul. We then discuss the service requirements which need to be satisfied to make the native Ethernet carrier class. The paper also discusses impacting underlying technologies which are crucial in making Carrier Ethernet a success. A simulations study throws light on the different strategies of implementing Carrier Ethernet.

Metropolitan Ethernet Network: A Move from LAN to MAN

Ethernet has been the indisputable technology of choice for the local area networks (LANs) for more than 30 years. Its popularity is due to its versatility, plug-n-play feature, and low cost. It has transformed from a CSMA/CD technology providing low throughput to a full duplex link increasing the throughput 1000 folds. Despite these improvements, Ethernet is still restricted to local area networks, and is not ready to become a carrier grade technology for wider areas. However, there are efforts to assist the transformation of Ethernet from the mainstream LAN technology to the possible adoption for metropolitan area networks (MENs). This paper will introduce the movement from basic Ethernet to the carrier grade Ethernet for MENs. The paper describes the underlying technology, offered services, the state-of-the-art, and the comparison between various technologies. In the context of the move from LAN to MAN, various problems and their corresponding solutions are discussed, along with the future of Metro Ethernet Network. 2

Traffic engineering in metro ethernet

IEEE Network, 2005

Traffic engineering is one of the major issues that has to be addressed in Metro Ethernet networks for quality of service and efficient resource utilization. This paper aims at understanding the relevant issues and outlines novel algorithms for multipoint traffic engineering in Metro Ethernet. We present an algorithmic solution for traffic engineering in Metro Ethernet using optimal multiple spanning trees. This iterative approach distributes traffic across the network uniformly without overloading network resources. We also introduce a new traffic specification model for Metro Ethernet, which is a hybrid of two widely used traffic specification models, the pipe and hose models.

D C1. 2–OAM Solution Specification for the Next Generation Carrier-Grade Ethernet Access Network

for dissemination) This deliverable describes a solution proposal of network and service management for carrier-grade Ethernet access network to support triple-play services. It details important issues for service provisioning such as service definition, selfprovisioning, resource management, network control and interface design. It also specifies core functionalities of the proposed architecture, divided into service delivery and service assurance.

Metro network design methodologies that build a next-generation network infrastructure based on this generation's services and demands

IEEE/OSA Journal of Lightwave Technology, 2004

This paper describes two key network architecture design concepts that relate to evolving existing transport networks into economically viable next-generation optical networks. Today's metropolitan transport networks largely consist of synchronous optical network/synchronous digital hierarchy rings or switch-toswitch fiber connections for some form of optical Ethernet. The result is an optical-electrical-optical infrastructure that has limited use in providing wavelength services. Wavelength-division multiplexing (WDM) is the enabling technology for wavelength services, but it has limited penetration in the metropolitan area due to its cost justification being dependent primarily on fiber relief. The first part of this paper shows how existing services, primarily using time-division-multiplexing (TDM) transport, can be used to economically justify a WDM infrastructure while achieving significantly lower costs than legacy design techniques would produce. Dynamic bandwidth-on-demand (BoD) service is another elusive goal envisioned for next-generation metropolitan networks. This paper addresses how an economically viable BoD infrastructure can be built based on revenues from existing enterprise services rather than relying on revenues from new and unproven services. Quantitative analyses, presented in the paper, show the key parameters that determine when BoD services will be used, how bandwidth granularity affects BoD decisions, and how the customer's use of BoD drives service provider network design considerations.