Cisco Systems 78-13983-04 Configuring Fast Ethernet Interfaces, Setting the Speed and Duplex Mode

Chapter 4 Configuring with the Command-Line Interface

Configuring Fast Ethernet Interfaces

Configuring Fast Ethernet Interfaces

To configure the FE interface of the MWR 1900, complete the following tasks:

•Configuring the FE Interface IP Address

•Setting the Speed and Duplex Mode

•Configuring Routing Protocol Attributes

•Configuring PIM

•Configuring HSRP Support

•Enabling the FE Interface

Configuring the FE Interface IP Address

To configure the FE interface, do the following starting in global configuration mode:

Step 1 Specify the port adapter type and the location of the interface to be configured.

Router(config)# interface fastethernet slot/port

The slot is always 0 and the port is the number of the port (0 or 1).

Step 2 Assign an IP address and subnet mask to the interface.

Router(config-if)#ip address ip_address subnet_mask

Setting the Speed and Duplex Mode

The Fast Ethernet ports of the MWR 1900 can run in full or half duplex mode and at 100 Mbps or 10 Mbps. The MWR 1900 also has an auto-negotiation feature that allows the router to negotiate the speed and duplex mode with the corresponding interface on the other end of the connection.

Auto negotiation is the default setting for the speed and transmission mode.

When configuring an interface speed and duplex mode, note these guidelines:

•If both ends of the line support auto negotiation, we highly recommend the default auto negotiation settings.

•When the auto negotiation is turned on for either speed or duplex, it auto negotiates both speed and duplex.

•If one interface supports auto negotiation and the other end does not, configure duplex and speed on both interfaces; do not use the auto setting on the supported side or the duplex setting will be half.

Cisco MWR 1900 Mobile Wireless Edge Router Software Configuration Guide

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