Analysis
The status updates, acquired from monitoring and from
IP Availability Manager
and
serve as input to the data model maintained by
. The data model involves a codebook created by
VMware engineering as a result of its knowledge of VoIP networks and VoIP applications. The
codebook identifies VoIP application problems and their symptoms, and presents a causality
mapping between each problem and its set of symptoms. diagnoses root-cause availability problems by finding the problems in the codebook that can best explain the observed symptoms. It also uses the codebook to correlate
the impact of a root-cause problem—either an application problem diagnosed by or a transport problem diagnosed by
IP Availability Manager
—on the applications that are either inaccessible or impaired as a result of the root-cause problem. also retrieves performance information from to conduct performance analysis, by comparing certain performance metrics against user-configurable performance thresholds. The thresholds are accessible through a Polling and
Thresholds Console attached to , as explained in the .