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Understanding the Network: A Practical Guide to Internetworking by Martin J. Michael

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IOS Message Logging

Keeping up with what is going on with your router is important. Logging provides this simple, but essential facility. In most cases, log information is simply status data, such as changes in the router's interface status, modifications to running configuration, and debugging output. When things are operating smoothly, this data is nice to have. When a problem comes up, however, this data can be quite valuable. The IOS uses UNIX's syslog logging system to generate IOS logging messages. The IOS provides four methods for viewing logging information:

  • Console—The router's console port

  • Monitor—The router's system monitor, a VTY "console" message display

  • Trap—Syslog output to a remote syslog server running on UNIX or NT

  • Buffer—A ...

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