Specifications

Configuring the 12E/2FE Interfaces 6-9
Configuring the Transmission Mode on 12E/2FE Interfaces
Step 6 Enable a virtual interface on a bridge group by entering the interface bvi command; then
assign an IP address and subnet mask to the bridge-group virtual interface by entering
the ip address command.
After enabling and assigning an IP address and subnet mask to the bridge-group virtual
interface, change the shutdown state to up and return to configuration mode to enable the
bridge-group virtual interface. The following example is for bridge group 10:
Router(config)# interface bvi 10
Router(config-if)# ip address 1.1.15.1 255.255.255.0
Router(config-if)# no shutdown
Router(config-if)# exit
Router(config)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface BVI10, changed state to up
Step 7 Repeat Step 6 for the remaining bridge groups.
Step 8 Specify the protocol to route in each bridge group by entering the command bridge route
{ip | ipx | appletalk} as follows:
Router(config)# bridge 10 route ip
Step 9 Repeat Step 8 for the remaining bridge groups.
Step 10 When you have included all of the configuration commands to complete the
configuration, press Ctrl-Z (hold down the Control key while you press Z) or enter end
to exit configuration mode and return to the EXEC command interpreter prompt as
follows:
Router(config)# Ctrl-Z
Router#
Step 11 Write the new configuration to nonvolatile memory as follows:
Router# copy running-config startup-config
[OK]
Router#
This completes the procedure for creating a basic configuration. Proceed to the “Configuring the
Transmission Mode on 12E/2FE Interfaces” section on page 6-9 for transmission mode
configuration examples, or proceed to the “Checking the Configuration” section on page 6-11 to
check the 12E/2FE interface configurations using show commands.
Configuring the Transmission Mode on 12E/2FE Interfaces
By default, all 12E/2FE interfaces (port 0 through port 13) support autosensing and autonegotiation
of the proper transmission mode (half-duplex or full-duplex) with an attached device. If an attached
device does not support autosensing and autonegotiation of the proper transmission mode, the
12E/2FE interfaces attached to the device automatically enter half-duplex mode.
Use the show running-config command to determine if a 12E/2FE interface is autosensing and
autonegotiating the proper transmission mode with an attached device. If a 12E/2FE interface is
autosensing and autonegotiating the transmission mode, the output from the show running-config
command does not display transmission mode information. If a 12E/2FE interface is configured for
half-duplex or full-duplex mode, the output from the show running-config command displays the
configured mode.