The Optical Transport Manager for SONET/SDH uses object classes to represent devices and populates them to the repository during discovery. The VMware Smart Assurance repository models the topology of the SONET/SDH network being managed. This topology is used to build the codebook, which is the basis for root-cause analysis.
The SONET/SDH domain includes all of the high-order circuits with “SDH” link paths of VC-3 and AU-4. These are the higher-bandwidth devices with speeds of 34M, 44M and 139M respectively. Low-order devices and protocols are populated to the PDH domain.
The Optical Transport Manager for SONET/SDH uses the relationships in the SONET/SDH topology domain and cross-correlates with Optical Transport Manager for PDH to calculate the impact that a root-cause problem in one element has on the elements and services that are connected to, or depend on it.
The Optical Transport Manager calculates which root-cause problems are causing symptom events and creates notifications for the problem origin only. The Optical Transport Manager uses the relationships in the topology to calculate the impact that a root-cause problem in one element has on the elements and services that are connected to, or depend on it.
Protection Schemes on page 95 provides information.
