Understanding Abbreviated Commands; No And Default Forms Of Commands; Cli Error Messages - Cisco Catalyst 2960 series Configuration Manual

Understanding Abbreviated Commands

Command or Action
Step 4
?
Example:
Switch> ?
Step 5 command ?
Example:
Switch> show ?
Step 6 command keyword ?
Example:
Switch(config)# cdp holdtime ?
<10-255> Length of time (in sec) that receiver
must keep this packet
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

This table lists some error messages that you might encounter while using the CLI to configure your switch.
Catalyst 2960-X Switch VLAN Configuration Guide, Cisco IOS Release 15.0(2)EX
4
Using the Command-Line Interface
Purpose
Lists all commands available for a particular command
mode.
Lists the associated keywords for a command.
Lists the associated arguments for a keyword.
OL-29065