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Cisco® Field Manual: Catalyst® Switch Configuration by Steve McQuerry, Dave Hucaby

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12-1. Logging

  • Logging is used by the switch to send system messages to a logging facility.

  • Logging messages can be sent to any of four different facilities: the switch console, a file on the switch, Telnet sessions, or a syslog server.

  • Logging history can be maintained in a file to ensure that a record of the messages being sent to Simple Network Management Protocol (SNMP) or syslog servers are kept in case a packet is lost or dropped.

  • Logging displays all error and debug messages by default. The logging level can be set to determine which messages should be sent to each of the facilities.

  • Time stamping logging messages or setting the syslog source address can help in real-time debugging and management. If the time and date are set on a switch, the ...

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