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Configuring LAN Interfaces

Configuring an Ethernet or Fast Ethernet Interface

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Cisco IOS Interface Configuration Guide

With the Catalyst 3000 or Catalyst 5000 system, the Fast Ethernet processor can be used to

aggregate up to twelve 10-Mbps LANs and give them high-speed access to such Layer 3 routing

services as providing firewalls and maintaining access lists.

Cisco 7200 series routers support an I/O controller with an RJ-45 interface. You can configure the

optional Fast Ethernet port for use at 100-Mbps full-duplex or half-duplex operation (half duplex is the

default). The Fast Ethernet port is equipped with either a single MII receptacle or an MII receptacle and

an RJ-45 receptacle. To support this new feature, the media-type interface command has been modified.

The media-type interface command now supports two options:

• 100basex—Specifies an RJ-45 100BASE-X physical connection.

• mii—Specifies a media-independent interface.

Second-generation Fast Ethernet Interface Processors (FEIP2-DSW-2TX and FEIP2-DSW-2FX) are

available on Cisco 7500 series routers and on Cisco 7000 series routers with the 7000 Series Route

Switch Processor (RSP7000) and 7000 Series Chassis Interface (RSP7000CI). The FEIP2-DSW is a

dual-port, fixed-configuration interface processor that provides two 100-Mbps Fast Ethernet (FE)

interfaces. Each interface on the FEIP2-DSW supports half-duplex only for a maximum aggregate

bandwidth of 200 Mbps.

Refer to the Cisco Product Catalog for specific platform and hardware compatibility information.

Use the show interfaces, show controllers mci, and show controllers cbus EXEC commands to display

the Ethernet port numbers. These commands provide a report for each interface supported by the router

or access server.

Use the show interface fastethernet command to display interface statistics, and use the show

controller fastethernet to display the information about the Fast Ethernet controller chip. The output

shows statistics, including information about initialization block information, transmit ring, receive ring

and errors.

For information on how to configure Fast EtherChannel, see the tasks listed in the “Configuring Fast

EtherChannel” section.

Ethernet and Fast Ethernet Interface Configuration Task List

Perform the tasks in the following sections to configure features on an Ethernet or Fast Ethernet

interface:

• Specifying an Ethernet or Fast Ethernet Interface (Required)

• Specifying an Ethernet Encapsulation Method (Optional)

• Specifying Full-Duplex Operation (Optional)

• Specifying the Media and Connector Type (Optional)

• Extending the 10BASE-T Capability (Optional)

• Configuring Fast Ethernet 100BASE-T (Optional)

• Configuring PA-12E/2FE Port Adapter (Optional)

• Configuring the 100VG-AnyLAN Port Adapter (Optional)

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Cisco Systems IC-23 Manual de usuario Pagina 2