Root-cause analysis

performs root-cause analysis at the different layers of the managed network, as shown in Bottom-up root-cause analysis .
Bottom-up root-cause analysis
A fundamental principle of root-cause analysis in
or any other
VMware Smart Assurance
Domain Manager
is the bottom-up approach, from physical-transport layer to application layer. Problems that occur at lower levels impact objects at higher levels.
performs availability-based root-cause analysis of the discovered MPLS and VPN topology objects, and relates physical-transport problems or BGP problems to the MPLS and VPN 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 or BGP problems.
When
detects an MPLS alarm, it checks for any physical-transport problem from
IP Availability Manager
or any BGP problem from
that might be causing the alarm. If it finds such a problem,
diagnoses the MPLS alarm as a symptom and exports the underlying physical-transport or BGP problem and the symptom to the
Global Manager
, as explained in Chapter 4, “MPLS Cross-Domain Impact Correlation Analysis.”
If it does not find such a problem,
focuses its analysis on the MPLS domain and performs the root-cause analysis that is described in this chapter.