No And Default Forms Of Commands; Cli Error Messages; Configuration Logging - Cisco Catalyst 3650 Series Configuration Manual

Using the Command-Line Interface

No and Default Forms of Commands

Almost every configuration command also has a no form. In general, use the no form to disable a feature or
function or reverse the action of a command. For example, the no shutdown interface configuration command
reverses the shutdown of an interface. Use the command without the keyword no to reenable a disabled feature
or to enable a feature that is disabled by default.
Configuration commands can also have a default form. The default form of a command returns the command
setting to its default. Most commands are disabled by default, so the default form is the same as the no form.
However, some commands are enabled by default and have variables set to certain default values. In these
cases, the default command enables the command and sets variables to their default values.

CLI Error Messages

This table lists some error messages that you might encounter while using the CLI to configure your switch.
Table 2: Common CLI Error Messages
Error Message
% Ambiguous command: "show
con"
% Incomplete command.
% Invalid input detected at
'^' marker.

Configuration Logging

You can log and view changes to the switch configuration. You can use the Configuration Change Logging
and Notification feature to track changes on a per-session and per-user basis. The logger tracks each
configuration command that is applied, the user who entered the command, the time that the command was
entered, and the parser return code for the command. This feature includes a mechanism for asynchronous
OL-32353-01
Meaning
You did not enter enough
characters for your switch to
recognize the command.
You did not enter all of the
keywords or values required by this
command.
You entered the command
incorrectly. The caret (^) marks the
point of the error.
WLAN Configuration Guide, Cisco IOS XE Release 3E (Catalyst 3650 Switches)
No and Default Forms of Commands
How to Get Help
Reenter the command followed by
a question mark (?) without any
space between the command and
the question mark.
The possible keywords that you can
enter with the command appear.
Reenter the command followed by
a question mark (?) with a space
between the command and the
question mark.
The possible keywords that you can
enter with the command appear.
Enter a question mark (?) to display
all of the commands that are
available in this command mode.
The possible keywords that you can
enter with the command appear.
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