11
Using the Command-Line Interface
CLI Error Messages
Understanding Abbreviated Commands
You need to enter only enough characters for the switch to recognize the command as unique.
This example shows how to enter the show configuration privileged EXEC command in an abbreviated form:
Switch# show conf
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
Table 3 on page 12 lists some error messages that you might encounter while using the CLI to configure your switch.
? List all commands available for a particular command mode.
For example:
Switch> ?
command ? List the associated keywords for a command.
For example:
Switch> show ?
command keyword ? List the associated arguments for a keyword.
For example:
Switch(config)# cdp holdtime ?
<10-255> Length of time (in sec) that receiver must keep this packet
Table 2 Help Summary (continued)
Command Purpose
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