NetView Program
The NetView program and VTAM work together to provide easy problem
determination facilities such as generic alerts, session flow tracing, and network
recovery (through user written CLISTs for activation/deactivation of a failing
component in the network), and monitoring facilities. The NetView program collects
information for problem determination and determines reasons for failures so that
the network continues operating while detecting possible failures.
The NetView program takes advantage of the LPDA problem determination facilities
to isolate an error affecting a DCE. Under control of these programs, the DCE
accepts commands and initiates tests that help isolate problems to the line, local
DCE, remote DCE, or other part of the network. They provide the network operator
with the most probable cause of network problems.
INOP messages, RECMS (or RECFMS) for network problems, and NMVT for
controller problems are reported to the host via VTAM. The NetView program
presents NMVTs as generic alerts. Other data is also collected from VTAM and
NCP, and stored in a data base to be displayed on request.
Online information is provided at the NetView console through a series of
menu-driven command screens which help to diagnose, isolate, and solve problems
in a network. For example, the NetView program helps determine a failure on an
attached 3745 or other communication controller.
Box Event Records
The MOSS automatically logs any new BER in the BER file stored on the MOSS
disk. The BER file contains two types of record:
Records related to a failure, and
Records related to other events, for example IML or IPL complete.
Each BER relating to a failure contains relevant data about the environment at the
instant of the detected failure.
Chapter 5. Problem Determination
5-3
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