Rockwell Collins Inc. 8222210 사용자 설명서
D r a f t 1 A - C I S C O C O N F I D E N T I A L
5-4
Cisco Aironet 1240AG Series Access Point Hardware Installation Guide
OL-7293-01
Chapter 5 Using the Command-Line Interface
Using no and default Forms of Commands
Using no and default Forms of Commands
Most configuration commands also have 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 re-enable
a disabled feature or to enable a feature that is disabled by default.
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 re-enable
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.
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.
Understanding CLI Messages
lists some error messages that you might encounter while using the CLI to configure your
access point.
Using Command History
The IOS provides a history or record of commands that you have entered. This feature is particularly
useful for recalling long or complex commands or entries, including access lists. You can customize the
command history feature to suit your needs as described in these sections:
useful for recalling long or complex commands or entries, including access lists. You can customize the
command history feature to suit your needs as described in these sections:
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Table 5-3
Common CLI Error Messages
Error Message
Meaning
How to Get Help
% Ambiguous command:
"show con"
You did not enter enough characters
for your access point to recognize the
command.
for your access point to recognize the
command.
Re-enter the command followed by a question mark (?)
with a space between the command and the question
mark.
with a space between the command and the question
mark.
The possible keywords that you can enter with the
command are displayed.
command are displayed.
% Incomplete command.
You did not enter all the keywords or
values required by this command.
values required by this command.
Re-enter the command followed by a question mark (?)
with a space between the command and the question
mark.
with a space between the command and the question
mark.
The possible keywords that you can enter with the
command are displayed.
command are displayed.
% Invalid input detected
at ‘^’ marker.
You entered the command
incorrectly. The caret (^) marks the
point of the error.
incorrectly. The caret (^) marks the
point of the error.
Enter a question mark (?) to display all the commands
that are available in this command mode.
that are available in this command mode.
The possible keywords that you can enter with the
command are displayed.
command are displayed.