Viewing a debug/syslog configuration

Use the show debug command to display the currently configured settings for:

Debug message types and Event Log message filters (severity level and system module) sent to debug destinations
Debug destinations (syslog servers or CLI session) and syslog server facility to be used

Syntax:


show debug

Displays the currently configured debug logging destinations and message types selected for debugging purposes. (If no syslog server address is configured with the logging <syslog-ip-addr> command, no show debug command output is displayed.)

Output of the show debug command

switch(config)# show debug

 Debug Logging
  Destination:
   Logging --
    10.28.38.164
    Facility=kern
    Severity=warning
    System module=all-pass
   Enabled debug types:
    event

Example:

In the following Example:, no syslog servers are configured on the switch (default setting). When you configure a syslog server, debug logging is enabled to send Event Log messages to the server. To limit the Event Log messages sent to the syslog server, specify a set of messages by entering the logging severity and logging system-module commands.

As shown at the top of Figure 52: Syslog configuration to receive event log messages from specified system module and severity levels, if you enter the show debug command when no syslog server IP address is configured, the configuration settings for syslog server facility, Event Log severity level, and system module are not displayed. However, after you configure a syslog server address and enable syslog logging, all debug and logging settings are displayed with the show debug command.

If you do not want Event Log messages sent to syslog servers, you can block the messages from being sent by entering the no debug event command. (There is no effect on the normal logging of messages in the switch's Event Log.)

Example:

The next Example: shows how to configure:

Debug logging of ACL and IP-OSPF packet messages on a syslog server at 18.38.64.164 (with user as the default logging facility).
Display of these messages in the CLI session of your terminal device's management access to the switch.
Blocking Event Log messages from being sent from the switch to the syslog server and a CLI session.

To configure syslog operation in these ways with the debug/syslog feature disabled on the switch, enter the commands shown in Figure 53: Debug/syslog configuration for multiple debug types and multiple destinations.