Specifications

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Catalyst 2970 Switch Software Configuration Guide
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Chapter 9 Configuring Interface Characteristics
Using Interface Configuration Mode
Using Interface Configuration Mode
The switch supports these interface types:
• Physical ports—including switch ports and routed ports
• VLANs—switch virtual interfaces
• Port-channels—EtherChannel of interfaces
You can also configure a range of interfaces (see the “Configuring a Range of Interfaces” section on
page 9-6).
To configure a physical interface (port), enter interface configuration mode, and specify the interface type,
module number, and switch port number.
• Type—Gigabit Ethernet (gigabitethernet or gi) for 10/100/1000 Mbps Ethernet ports or small
form-factor pluggable (SFP) Gigabit Ethernet interfaces.
• Module number—The module or slot number on the switch (always 0 on the Catalyst 2970 switch).
• Port number—The interface number on the switch. The port numbers always begin at 1, starting at
the left when facing the front of the switch, for example, gigabitethernet0/1, gigabitethernet0/2. On
a switch with SFP modules, the SFP module ports are numbered consecutively following the
10/100/1000 interfaces. The SFP module ports are gigabitethernet 0/25 through gigabitethernet
0/28.
You can identify physical interfaces by physically checking the interface location on the switch. You can
also use the Cisco IOS show privileged EXEC commands to display information about a specific
interface or all the interfaces on the switch. The remainder of this chapter primarily provides physical
interface configuration procedures.
Procedures for Configuring Interfaces
These general instructions apply to all interface configuration processes.
Step 1 Enter the configure terminal command at the privileged EXEC prompt:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#
Step 2 Enter the interface global configuration command. Identify the interface type and the number of the
connector. In this example, Gigabit Ethernet interface 0/1 is selected:
Switch(config)# interface GigabitEthernet0/1
Switch(config-if)#
Note You do not need to add a space between the interface type and interface number. For example,
in the preceding line, you can specify either gigabitethernet 0/1, gigabitethernet0/1, gi 0/1, or
gi0/1.
Step 3 Follow each interface command with the interface configuration commands that the interface requires.
The commands that you enter define the protocols and applications that will run on the interface. The
commands are collected and applied to the interface when you enter another interface command or enter
end to return to privileged EXEC mode.