Command Reference

show logging

Use the show logging EXEC command to display the state of logging (syslog).
show logging [history]

Syntax Description

history (Optional) Display information in the syslog history table only.

Command Mode

EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 10.0.

This command displays the state of syslog error and event logging, including host addresses, and whether console logging is enabled. This command also displays Simple Network Management Protocol (SNMP) configuration parameters and protocol activity.

When you use the optional history keyword, information about the syslog history table is displayed such as the table size, the status of messages, and text of messages stored in the table. Messages stored in the table are governed by the logging history global configuration command.

Sample Display

The following is sample output from the show logging command:
Router# show 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
SNMP logging: disabled, retransmission after 30 seconds
    0 messages logged
  
The following table describes significant fields shown in the display.

Field Description

Syslog logging When enabled, system logging messages are sent to a UNIX host that acts as a syslog server; that is, it captures and saves the messages.

Console logging If enabled, states the level; otherwise, this field displays disabled.

Monitor logging Minimum level of severity required for a log message to be sent to a monitor terminal (not the console).

Trap logging Minimum level of severity required for a log message to be sent to a syslog server.

SNMP logging Shows whether SNMP logging is enabled and the number of messages logged, and the retransmission interval.

The following is sample output from the show logging history command:
Router# show logging history
Syslog History Table: 1 maximum table entry, saving level notifications or higher
0 messages ignored, 0 dropped, 15 table entries flushed,
SNMP notifications not enabled
  entry number 16: SYS-5-CONFIG_I
  Configured from console by console
  timestamp: 1110
  
The following table describes the significant fields shown in the display.

Field Description

maximum table entry Number of messages that can be stored in the history table. Set with the logging history size command.

saving level notifications or higher Level of messages that are stored in the history table and sent to the SNMP server (if SNMP notification is enabled). Set with the logging history command.

messages ignored Number of messages not stored in the history table because the severity level is greater than that specified with the logging history command.

dropped Number of messages that could not be processed due to lack of system resources. Dropped messages do not appear in the history table and are not sent to the SNMP server.

table entries flushed Number of messages that have been removed from the history table to make room for newer messages.

SNMP notifications Whether syslog traps of the appropriate level are sent to the SNMP server. Syslog traps are either enabled or not enabled through the snmp-server enable command.

entry number Number of the message entry in the history table.

SYS-5-CONFIG_I
Configured from console by console Cisco IOS syslog message consisting of the facility name (SYS) which indicates where the message came from, the severity level (5), the message name (CONFIG_I), and the message text.

timestamp Time, based on the router's up time, that the message was generated.

Field	Description
Syslog logging	When enabled, system logging messages are sent to a UNIX host that acts as a syslog server; that is, it captures and saves the messages.
Console logging	If enabled, states the level; otherwise, this field displays disabled.
Monitor logging	Minimum level of severity required for a log message to be sent to a monitor terminal (not the console).
Trap logging	Minimum level of severity required for a log message to be sent to a syslog server.
SNMP logging	Shows whether SNMP logging is enabled and the number of messages logged, and the retransmission interval.

Field	Description
maximum table entry	Number of messages that can be stored in the history table. Set with the logging history size command.
saving level notifications or higher	Level of messages that are stored in the history table and sent to the SNMP server (if SNMP notification is enabled). Set with the logging history command.
messages ignored	Number of messages not stored in the history table because the severity level is greater than that specified with the logging history command.
dropped	Number of messages that could not be processed due to lack of system resources. Dropped messages do not appear in the history table and are not sent to the SNMP server.
table entries flushed	Number of messages that have been removed from the history table to make room for newer messages.
SNMP notifications	Whether syslog traps of the appropriate level are sent to the SNMP server. Syslog traps are either enabled or not enabled through the snmp-server enable command.
entry number	Number of the message entry in the history table.
SYS-5-CONFIG_I Configured from console by console	Cisco IOS syslog message consisting of the facility name (SYS) which indicates where the message came from, the severity level (5), the message name (CONFIG_I), and the message text.
timestamp	Time, based on the router's up time, that the message was generated.