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Catalyst 2940 Switch Software Configuration Guide
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Chapter22 Configuring System Messa ge Logging Configuring System Message Logging
Enabling and Disabling Time Stamps on Log Messages
By default, log messages are not time-stamped.
Beginning in privileged EXEC mode, follow these steps to enable timestamping of log messages:
To disable time stamps for both debug and log messages, use the no service timestamps global
configuration command.
This example shows part of a logging display with the service timestamps log datetime global
configuration command enabled:
*Mar 1 18:46:11: %SYS-5-CONFIG_I: Configured from console by vty2 (10.34.195.36)
This example shows part of a logging display with the service timestamps log uptime global
configuration command enabled:
00:00:46: %LINK-3-UPDOWN: Interface Port-channel1, changed state to up
Enabling and Disabling Sequence Numbers in Log Messages
Because there is a chance that more than one log message can have the same time stamp, you can display
messages with sequence numbers so that you can unambiguously refer to a single message. By default,
sequence numbers in log messages do not appear.
Beginning in privileged EXEC mode, follow these steps to enable sequence numbers in log messages:
To disable sequence numbers, use the no service sequence-numbers global configuration command.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 service timestamps log uptime
or
service timestamps log datetime [msec] [localtime]
[show-timezone]
Enable log timestamps.
The first command enables timestamps on lo g m es s ag es,
showing the time since the system was rebooted.
The second command enables timestamps on log messages.
Depending on the options selected, the timestamp can
include the date, time in milliseconds relative to the local
time zone, and the time zone name.
Step3 end Return to privileged EXEC mode.
Step4 show running-config Verify your entries.
Step5 copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 service sequence-numbers Enable sequence numbers.
Step3 end Return to privileged EXEC mode.
Step4 show running-config Verify your entries.
Step5 copy running-config startup-config (Optional) Save your entries in the configuration file.