Cisco WS-C2960-24TC-S Software Guide - Page 466
Synchronizing Log Messages, logging buffered, show logging, clear, logging, no logging console, debug
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Configuring System Message Logging Chapter 25 Configuring System Message Logging The logging buffered global configuration command copies logging messages to an internal buffer. The buffer is circular, so newer messages overwrite older messages after the buffer is full. To display the messages that are logged in the buffer, use the show logging privileged EXEC command. The first message displayed is the oldest message in the buffer. To clear the contents of the buffer, use the clear logging privileged EXEC command. To disable logging to the console, use the no logging console global configuration command. To disable logging to a file, use the no logging file [severity-level-number | type] global configuration command. Synchronizing Log Messages You can synchronize unsolicited messages and debug privileged EXEC command output with solicited device output and prompts for a specific console port line or virtual terminal line. You can identify the types of messages to be output asynchronously based on the level of severity. You can also configure the maximum number of buffers for storing asynchronous messages for the terminal after which messages are dropped. When synchronous logging of unsolicited messages and debug command output is enabled, unsolicited device output appears on the console or printed after solicited device output appears or is printed. Unsolicited messages and debug command output appears on the console after the prompt for user input is returned. Therefore, unsolicited messages and debug command output are not interspersed with solicited device output and prompts. After the unsolicited messages appear, the console again displays the user prompt. Beginning in privileged EXEC mode, follow these steps to configure synchronous logging. This procedure is optional. Step 1 Step 2 Command configure terminal line [console | vty] line-number [ending-line-number] Purpose Enter global configuration mode. Specify the line to be configured for synchronous logging of messages. • Use the console keyword for configurations that occur through the switch console port. • Use the line vty line-number command to specify which vty lines are to have synchronous logging enabled. You use a vty connection for configurations that occur through a Telnet session. The range of line numbers is from 0 to 15. You can change the setting of all 16 vty lines at once by entering: line vty 0 15 Or you can change the setting of the single vty line being used for your current connection. For example, to change the setting for vty line 2, enter: line vty 2 When you enter this command, the mode changes to line configuration. 25-6 Catalyst 2960 Switch Software Configuration Guide OL-8603-04
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