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Delivering IP Over Glass
Shannon Hansen
Manager, Product Marketing
Cisco Systems
Traffic on the Internet is growing at rates never seen before in telecommunications. As the Internet proliferates and changes the way we all live, work, play, and learn, how will service provider backbones evolve to not only support the bandwidth required to drive the Internet but also the evolutionary applications shaping every aspect of our lives? The end-goal service providers are striving for is an IP on glass infrastructure. But how do providers reach this goal? One such path is through the introduction of wavelength routing in the service provider’s optical core. This presentation will provide a brief overview of wavelength routing and how Wavelength RoutersTM can provide a path from the service provider’s current TDM infrastructure to one of IP on glass.
Dr. Norman Swenson
VP, Research and Development
Kestrel Solutions
IP on glass networks can be architected in a variety of ways depending on demands, traffic flow, and available infrastructure. Placing large IP routers at every node to aggregate traffic can be a workable option if every node has very large demands. However, in most cases (especially in the metropolitan market), many nodes will require only a small fraction of the overall demand. For those cases, a smaller router at each node with a large central router can be a better option.
Once the decision has been made that smaller routers are the best option, the problem of transporting IP traffic between nodes and from the nodes back to the central routing location becomes one of getting the most out of your glass. Several options for transporting the traffic exist, and each has benefits and shortcomings. Multiple fibers can be deployed to carry the traffic, SONET multiplexers can be used to TDM aggregate the data streams together, DWDM can be used to put each data stream on a wavelength, or Optical FDM can be used to transparently multiplex the signals onto a single wavelength.
In this presentation, the benefits and shortcomings of each strategy will be analyzed and presented, with factors ranging from port density to reconfigurability to bandwidth efficiency considered.
Will Russ
Senior Network Architect
Tellium
Growth in Internet backbone demand has justified the development and deployment of OC-48c and OC-192c router ports. Higher bit rate ports are, by themselves, less expensive (per bit) to deploy, but going further and executing a newly possible architectural step brings a complementary set of efficiencies that reduces transport costs. Is there really a compelling economic reason to change the way these line rates are managed and transported? This presentation describes an architecture that reaps immediate economic advantages by reducing spare capacity ratios and provisioning costs. It increases bandwidth utilization by implementing an unprecedented plane of traffic engineering and without being held hostage when newer generations of network elements become available or by any one vendor. It uses standardized protocols to inter-operate from layer one to layer three.