Lightpath design & management tool for IP-over-CWDM networks with ROADMs

A lightpath design and management tool with parallel processing capabilities and a flexible upgradability, allowing new functions to be added to the system without any system program changes, has been designed and implemented for IP-over-CWDM networks with ROADMs. The tool can process applications composed of some sub applications in parallel in multi machines for high-speed performance. In addition, the tool was designed to have a flexible upgradability, i.e. no changes of the system programs are required when adding the new functions. The system functions are to design lightpaths and wavelengths allocated to ROADMs for the lightpaths required to groom given traffic. The tool also can search possible lightpath routes made by ROADMs with specified switch states, and output the total optical losses of the routes. By the tool implemented in one management and 3 calculation machines for the parallel processing, the total time to obtain the results for a 5-node IP-over-CWDM network was reduced down to 65 % of the total time by the tool with a single machine without parallel processing. The tool enables the network administrators to design and manage the lightpath reconfigurations effectively without errors by avoiding making unlinked lightpaths through routes with higher losses to connect nodes, before the reconfiguration.