When doing sh log, I can see there is a monitor logging configured.
I know that console logging is send to the physical console port, and that buffer logging is sent to the memory of the Switch/Router, and trap logging is sent to a Syslog server. Where is the data going if logging Monitor is configured??
If you mean the terminal monitor command, that will send debug and system messages to the current terminal session. If you are connected to the device via a VTY line, you need to use this command to see those because it may look like you are connected the the CON line, but you are not.
Cisco maintains extensive documentation that is just a search away:
Cisco IOS Configuration Fundamentals Command Reference, Release 12.2:
terminal monitor
To display debug command output and system error messages for the current terminal and session, use the terminal monitor EXEC command.
terminal monitor
Syntax Description
This command has no arguments or keywords.
Defaults
Disabled
Command Modes
EXEC
Command History
Usage Guidelines
Remember that all terminal parameter-setting commands are set locally and do not remain in effect after a session is ended.
Examples
In the following example the system is configured to display debug command output and error messages during the current terminal session:
Router# terminal monitor
The logging montor command will enable terminal line (monitor) logging.
Cisco IOS Network Management Command Reference
logging monitor
To enable system message logging to the terminal lines (monitor connections), use the logging monitor command in global configuration mode. To disable logging to terminal lines other than the console line, use the no form of this command.
logging monitor [discriminator discr-name] [severity-level] no logging monitorSyntax Description
Command Default
The logging monitor function is disabled.
Command Modes
Global configuration (config)
Command History
Usage Guidelines
Specifying a severity-level causes messages both at that level and at numerically lower levels to be displayed to the monitor. Table 32 shows a list of levels and corresponding syslog definitions.
Table 32 Error Message Logging Priorities and Corresponding Syslog
Definitions
Examples
The following example shows how to specify that messages at levels 3 (errors), 2 (critical), 1 (alerts), and 0 (emergencies) be logged to monitor connections:
Router(config)# logging monitor 3The following example shows how to use a discriminator named monitor1 to filter critical messages, meaning that messages at levels 0, 1, and 2 are filtered:
Router(config)# logging monitor discriminator monitor1 criticalRelated Commands
Minimum level of severity required for a log message to be sent to a monitor terminal (not the console).
Cisco IOS Configuration Fundamentals Command Reference
Router# show controllers vip 4 logging
Syslog logging: enabled
Console logging: disabled
Monitor logging: level debugging, 266 messages logged.
Trap logging: level informational, 266 messages logged.
Logging to 192.180.2.238
