This paper proposes the introduction of 2x2 magnetooptical switches as a reconfigurable physical layer with no link loss to provide higher throughput, and simultaneously, reduce CPU packet forwarding load in server-centric datacenters.
A key feature of Carrier Ethernet networks is its operation and management framework. The link state, in this context, is simply determined by the detection (or absence for a given period) of continuity check message (CCM) at the receiver end of a management end point. However, cross-layer information can be inexpensively gained by looking into the loss patterns of these CCM frames, especially when Carrier Ethernet is operating directly over wavelengths (Layer-1) from transparent optical links or networks. This paper experimentally demonstrates a case for optical signalto-noise and optical signal-to-interference estimation from monitoring standard CCM frame loss frame rate. Moreover, the loss pattern signatures of such physical-layer impairments may give in-depth link state information for fault and performance management as it may give valuable clues about the dominant impairing phenomena.
Resumo-Esse artigo apresenta uma metodologia para o projeto completo de redes ópticas em anéis hierárquicos. Partindo da matriz de demanda de tráfego, foram analisadas todas as etapas de projeto: o projeto da topologia virtual, a alocac ¸ão de comprimentos de onda e roteamento de tráfego e a análise de desempenho da rede com o simulador de redes ópticas OWns. São apresentados os resultados para o desempenho de redes de 60 nós em func ¸ão de características de sua topologia física.Palavras-Chave-Redes ópticas, projeto de redes, anéis hierárquicos.
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