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Catalyst 2940 Switch Software Configuration Guide
78-15507-02
Chapter 2 Using the Command-Line Interface
Specifying Ports in Interface Configuration Mode
Specifying Ports in Interface Configuration Mode
To configure a port, you need to specify the interface type, slot, and port number by using the interface
configuration command. For example, to configure port 4 on a switch, you enter:
switch(config)# interface fa 0/4
• Interface type—Each switch platform supports different types of interfaces. To display a complete
list of the interface types supported on your switch, enter the interface ? global configuration
command.
• Slot number—The slot number on the switch. On the modular Catalyst 2900 XL switches, the slot
number is 1 or 2. On the Catalyst 2950 or the Catalyst 2955 switches, the slot number is 0.
• Port number—The number of the physical port on the switch. Refer to your switch for the port
numbers.
Abbreviating Commands
You have 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:
Switch# show conf
Using 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 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 ? 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 2-2 Help Summary (continued)
Command Purpose