Name: Cisco 2950 - Catalyst Switch
Brand: Cisco
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CHAPTER

11-1

Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide

78-11380-10

Configuring Interface Characteristics

This chapter describes the types of interfaces on a Catalyst 2950 or Catalyst 2955 switch and how to

configure them. The chapter has these sections:

• Understanding Interface Types, page 11-1

• Using the Interface Command, page 11-4

• Configuring Ethernet Interfaces, page 11-8

• Monitoring and Maintaining the Interfaces, page 11-15

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 Cisco

IOS 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 switch ports.

Switch ports are Layer 2-only interfaces associated with a physical port. They are used for managing the

physical interface and associated Layer 2 protocols and do not handle routing or bridging. A switch port

can be an access port or a trunk port.

You can configure a port as an access port or trunk port or let the Dynamic Trunking Protocol (DTP)

operate on a per-port basis to determine if a switch port should be an access port or a trunk port by

negotiating with the port on the other end of the link.

Configure switch ports by using the switchport interface configuration commands. For detailed

information about configuring access port and trunk port characteristics, see Chapter 17, “Configuring

VLANs.”

Note The physical switch ports can be 10/100 Ethernet ports, 10/100/1000 Ethernet ports, 100BASE-FX ports,

1000BASE-SX ports, Long-Reach Ethernet (LRE) ports, Gigabit Interface Converter (GBIC) module

ports, or small form-factor pluggable (SFP)-module ports. For more information, refer to the switch

hardware installation guide.

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Cisco 2950 - Catalyst Switch Specifications

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