Root-cause analysis

performs availability-based root-cause analysis of the discovered BGP topology objects. It also relates physical-transport problems to the BGP objects, along the affected data path, that are no longer accessible or experience from lack of response or performance as a result of the physical-transport problems.
When
detects a BGP failure, it checks for any physical-transport problem from
IP Availability Manager
that might be causing the failure. If it finds such a problem,
diagnoses the BGP failure as a symptom and exports the underlying physical-transport problem and the BGP symptom to the
Global Manager
, as explained in Chapter 4, “BGP Cross-Domain Impact Correlation Analysis.”
If it does not find such a problem,
focuses its analysis on just the BGP domain and performs the root-cause analysis described in this chapter.