METHOD AND SYSTEM FOR FAULT ISOLATION WITHIN A NETWORK ELEMENT IN AN OPTICAL NETWORK

摘要

A method and system for fault isolation within a network element in an optic al network is described. A single fault in the system can give rise to multiple alarms detected at multiple points. Finding the root cause alarm corresponding to the fault tha t has triggered these alarms is important for fault isolation and is the focus of attention for th is invention. The network element is modeled by a directed acyclic graph that captures the interaction s among various components in the network element. Using a graph-based technique the inventi on analyzes the various topological faults raised and their locations for identifying root cause alarms and masking all correlated alarms.