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Catalyst 2950 Desktop Switch Software Configuration Guide
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Chapter 9 Configuring Interface Characteristics
Using the Interface Command
Figure 9-1 Connecting VLANs with Layer 2 Switches
Using the Interface Command
The switch supports these interface types:
• Physical ports—Switch 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,
slot, and number.
• Type—Fast Ethernet (fastethernet or fa) for 10/100 Ethernet or Gigabit Ethernet (gigabitethernet or
gi)
• Slot—The slot number on the switch (always 0 on this 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, fastethernet 0/1, fastethernet 0/2. If there
is more than one media type (for example, 10/100 ports and Gigabit Ethernet ports), the port number
starts again with the second media: gigabitethernet 0/1, gigabitethernet 0/2.
You can identify physical interfaces by physically checking the interface location on the switch. You can
also use the 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.
Host A
Switch
Cisco router
VLAN 20
Host B
VLAN 30
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