Cisco Systems IC-23 manual Configuring an Ethernet or Fast Ethernet Interface

Configuring LAN Interfaces

Use the information in this chapter to configure LAN interfaces supported on Cisco routers and access servers.

This chapter describes the processes for configuring LAN interfaces in the following sections:

•Configuring an Ethernet or Fast Ethernet Interface

•Configuring Fast EtherChannel

•Configuring a Fiber Distributed Data Interface

•Configuring a Hub Interface

•Configuring a LAN Extender Interface

•Configuring a Token Ring Interface

For examples of configuration tasks, see the “LAN Interface Configuration Examples” section.

For hardware technical descriptions and information about installing interfaces, refer to the hardware installation and configuration publication for your product. For a complete description of the LAN interface commands used in this chapter, refer to the “Interface Commands” chapter of the Cisco IOS Interface Command Reference. To locate documentation of other commands that appear in this chapter, use the command reference master index or search online.

Configuring an Ethernet or Fast Ethernet Interface

Cisco supports both 10-Mbps Ethernet and 100-Mbps Fast Ethernet.

Support for the 10-Mbps and 100-Mbps Ethernet interface is supplied on various Ethernet network interface cards or systems.

The Fast Ethernet NP-1FE module, for example, provides the following benefits:

•VLAN routing—Virtual LAN (VLAN) support enables network managers to group users logically rather than by physical location. The high performance of the underlying Cisco 4700, combined with the feature-rich NP-1FE, makes it an ideal combination for a low-density, higher-performance application such as inter-VLAN routing.

•High-speed interconnections—The Fast Ethernet interface enables network managers to implement Fast-Ethernet routing solutions for optimal cost and performance across a wide range of applications, including campus or enterprise backbones and data centers. It is also a low-cost way to provide Fast-Ethernet access to traditional low-speed WAN services.

•Local area network aggregation—The Cisco 4500 or the Cisco 4700 series routers can support as many as 12 Ethernet, 4 Token Ring, or 1 FDDI segment. ISDN interfaces are also supported.

Cisco IOS Interface Configuration Guide

IC-23