Analysis
The status updates, which are
acquired from
IP Availability Manager
and from periodic monitoring, serve as input to the data
model in the
repository.
applies the status updates to the appropriate attributes of
the corresponding BGP objects in the data model.
The data model involves a
codebook that is created by VMware engineers as a result of their knowledge of
IP and BGP networks. The codebook identifies IP and BGP 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 code book that can best explain the observed symptoms. It also
uses the code book to correlate the impact of a root-cause problem on the BGP
objects that are either inaccessible or impaired as a result of the root-cause
problem. The root-cause problem is either a physical-transport problem that is
diagnosed by
IP Availability Manager
or a BGP problem that is diagnosed by
.