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Performance and Fault Management by James M. Thompson, Kent J. Phelps, Robert L. Pavone, Christopher E. Elliott, Paul L. Della Maggiora

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General Network Management

This section covers general network-management issues such as the following:

  • Configuring SNMP on devices

  • Capturing SNMP and Telnet output through scripting

  • Using syslog

  • Using RMON

How Do I Configure Logging to a syslog Server?

Aside from traps, Cisco devices provide useful device state information by using the UNIX syslog facility. Whereas SNMP traps are well-defined and tend to reflect stateful changes, logging messages from Cisco devices are free-form text with well-defined names that reflect a wide range of conditions. The types of messages can range from debugging information such as when you enable debugging, to so-called “emergency” level messages, which reflect a catastrophic event such as a failing interface.

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