In this module, it was explained that a network baseline is required for
effective troubleshooting. Devices and key interfaces should be baselined to
provide a reference for subsequent analysis. The thresholds for these devices
and interfaces should be documented.
The need for network documentation
consisting of a network configuration table and topology diagram was
emphasized. The components of a network configuration table and topology
diagram can be categorized by the logical layers that they are associated with
in the TCP/IP model. Following established procedures, a troubleshooter can
gather relevant configuration information about routers and switches.
Performing the five stages in the process of creating network documentation
allows a troubleshooter to create a network configuration table and topology
diagram. Following guidelines makes it easy for a troubleshooter to create
useful and effective network configuration documentation.
End-system
documentation consists of a configuration table and end-to-end topology
diagram. The components of an end-system configuration table and topology
diagram can be split into physical and logical categories. Following
established procedures, a troubleshooter can gather relevant configuration
information about a variety of end-systems. There are several commands and
applications available for discovering configuration information about
end-systems. Good end-system configuration documentation allows rapid discovery
of specific information about end-systems.
The next module will expand
on internetwork troubleshooting with an exploration of troubleshooting
methodologies and tools.