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
.