bandwidth enhances
Bandwidth engineering Transport enhances IP
Network operators are leveraging new transport solutions to streamline their networks. Chris Liou, VP Product Management and Strategy, at Coriant, follows on from his presentation at ECOC 2015 to highlight the advantages of OTN/WDM systems.
processing cards coming onto the market, an added level of high-speed packet intelligence and capability is now enabled within the OTN/WDM core. Newsworthy? We think so. In today’s environment, converged OTN/WDM is widely deployed and operators are pressured to drive further optimisation across their multi- layer networks. This concept (and its realisation) has attracted the attention of progressive network operators, due to its ability to further reduce total networking costs by offloading core routers of basic packet transport and aggregation functions and enabling high- speed Ethernet services directly within the transport layer. This results in a reduction in the number of router ports required in networks. By enabling L2 packet transport, aggregation and services functions within the optical/ OTN backbone, operators now
P-OTN
Chris Liou VP Product Management and Strategy, Infinera A t last year’s ECOC Market Focus, I had the pleasure of sharing some insights into how network operators are leveraging new converged packet-aware optical transport solutions to streamline their core IP/optical networks. We are already witnessing broad industry adoption of converged OTN/ WDM platforms in the core of the network as service providers are realising that integrated OTN switching facilitates faster service delivery, simpler bandwidth management and more efficient wavelength fill. With the emergence of high- speed, sophisticated packet-
P-OTN
Flexible sized trunks P-OTN
P-OTN
P-OTN enables packet aggregation to optimise the number of router ports utilised.
services at different rates into wavelengths, and switch services between wavelengths as needed. Similarly, the core IP layer is experiencing a technology upgrade cycle in order to accommodate increased IP demands. As in the transport layer, however, it behoves service providers to maximise the utilisation of these resources, rather than to just continue the same present mode of operation of the last few decades for scaling IP networks. Rather than throwing more wavelengths and bandwidth at the problem, leading to under-optimised link utilisation, and counting on market price erosion at each network layer to lower the cost of the network, many service providers are exploring how to more efficiently utilise their deployed capital, and leverage the underlying optical transport layer where they can.
have access to new tools to enable more efficient router interconnect and bandwidth engineering capabilities directly within the transport layer, without having to send traffic up to the router layer. This allows the service provider to more flexibly switch packet traffic at the most appropriate transport layer, and route packets only when needed. The net effect is not only cost savings and enhanced network efficiency, but also guaranteed bandwidth and performance for high- speed packet services. Even in light of the expanded fiber capacity enabled by the 100 Gb/s upgrade occurring on many service providers’ optical backbones, it remains critical to efficiently utilise the bandwidth and minimise the cost of transporting traffic across the IP/ optical backbone. The industry is already witnessing the broad deployment of OTN as a means to efficiently multiplex multiple
Dedicated pt2pt wavelengths
Traditional approach results in a higher router port count.
ISSUE 6 | Q1 2016 32
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