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CHAPTER
9-1
Catalyst 2950 Desktop Switch Software Configuration Guide
78-11380-05
9
Configuring Interface Characteristics
This chapter defines the types of interfaces on the switch and describes how to configure them. The
chapter has these sections:
• Understanding Interface Types, page 9-1
• Using the Interface Command, page 9-4
• Configuring Layer 2 Interfaces, page 9-9
• Monitoring and Maintaining the Interfaces, page 9-14
Note For complete syntax and usage information for the commands used in this chapter, refer to the switch
command reference for this release and the online Cisco IOS Interface Command Reference for
Release 12.1.
Understanding Interface Types
This section describes the different types of interfaces supported by the switch with references to
chapters that contain more detailed information about configuring these interface types. The rest of the
chapter describes configuration procedures for physical interface characteristics.
These sections are included:
• Port-Based VLANs, page 9-1
• Switch Ports, page 9-2
• EtherChannel Port Groups, page 9-3
• Connecting Interfaces, page 9-3
Port-Based VLANs
A VLAN is a switched network that is logically segmented by function, team, or application, without
regard to the physical location of the users. For more information about VLANs, see Chapter 13,
“Configuring VLANs.” Packets received on a port are forwarded only to ports that belong to the same
VLAN as the receiving port. Network devices in different VLANs cannot communicate with one another
without a Layer 3 device to route traffic between the VLANs.