3com 3031 Instruccion De Instalación

As mentioned earlier, an Ethernet interface can work at both full-duplex mode and 
half-duplex mode. Connected to a hub, the Ethernet interface on a router must be 
specified to work in half-duplex mode. Connected to a LAN Switch, however, it 
must be specified to work in full-duplex mode. Perform the following 
configuration in Ethernet interface view to select an operating mode.

By default, 

negotiation

 is selected, i.e., the system automatically chooses an 

optimum operating mode.

Sometimes, you need to enable local loop on an interface for the purpose of 
testing some special functions. Perform the following configuration in Ethernet 
interface view to enable an interface to make local loop.

By default, local loop is disabled.

Perform the following configuration in any view.

As shown in the following figure, the Ethernet interface on Router A is connected 
to the IP network 192.168.0.0. The computers on the LAN are connected to the 
Internet via Router A. Set the MTU on the Ethernet interface to 1492 bytes.

Figure 30   Networking diagram of Ethernet configuration example

Table 139   Selecting an operating mode for the FE interface

Select an operating mode for the FE 
interface

Table 140   Enabling or disabling local loop

Enable local loop

Disable local loop

Table 141   Displaying the state of a specified Ethernet interface

Display the state of a specified Ethernet 
interface

Internet

Interface Address

192.168.0.1

E0

LAN

Router A

Network Address

192.168.0.0