Logging command
At the global configuration level, the loggingcommand
allows you to enable debug logging on specified syslog servers and
select a subset of Event Log messages to send for debugging purposes
according to:
Severity level
System module
By specifying both a severity level and system module, you can use both configured settings to filter the Event Log messages you want to use to troubleshoot switch or network error conditions.
After you configure a syslog server and a severity
level and/or system module to filter the Event Log messages that are
sent, if you save these settings to the startup configuration file
by entering the write memory command, these debug
and logging settings are automatically re-activated after a switch
reboot or power recycle. The debug settings and destinations configured
in your previous troubleshooting session will then be applied to the
current session, which may not be desirable.
After a reboot, messages remain in the Event Log and are not deleted. However, after a power recycle, all Event Log messages are deleted.
If you configure a severity level, system module,
or both to temporarily filter Event Log messages, be sure to reset
the values to their default settings by entering the no form of the following commands to ensure that Event Log messages
of all severity levels and from all system modules are sent to configured
syslog servers:
switch(config)# no logging severity <debug | major | error | warning | info> switch(config)# no logging system-module <system-module>