Today’s Multi-Layered Networks
■Today’s networks use multiple hierarchies and technologies requiring multiple protocol adaptations and encapsulations to map Internet Protocol (IP) and Ethernet traffic (at Layers 2 and 3 [L2 and L3]) to the physical optical transport network. Therefore, to create an IP/Ethernet mesh between switches/routers requires mapping multiple physical interfaces to a connection-oriented transport network. These add/drop multiplexers (ADMs) aggregated this traffic to higher speed interfaces typically using Time Division Multiplexing (TDM) techniques prior to handing off to the dense wave division multiplexing (DWDM) transport plane. The resulting network implementation often results in underutilized infrastructure and resources due to inefficiency of the physical interfaces from the switches/routers. At the transport layer, fibers and the wavelengths they carry may also only be partially filled driving overall higher costs and operational complexities. Figure 1 illustrates a typical multi-hierarchical reference network.
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White Paper |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2015/9/10 |
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594 KB |
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