The Layer 3 failures reported and analyzed by the IP Manager include both physical and logical failures. An example of a logical failure is “IP Network Connection failure.”

Cross-domain correlation provides root cause analysis that takes into account the failures that occur in both Layer 3 and Layer 1 domains. The XD Manager OTM to IP provides root cause analysis that links failures to a single root cause in the Optical domain, the IP domain, or in the connection in between the optical and IP devices. In addition, the XD Manager OTM to IP identifies the entities that are impacted by the failures.