9-21
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-06
Chapter 9 Configuring Interfaces
Configuring Ethernet Interfaces
Beginning in privileged EXEC mode, follow these steps to configure auto-MDIX on an interface:
To disable auto-MDIX, use the no mdix auto interface configuration command.
This example shows how to enable auto-MDIX on a port:
Switch# configure terminal
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# no shutdown
Switch(config-if)# speed auto
Switch(config-if)# duplex auto
Switch(config-if)# mdix auto
Switch(config-if)# end
Adding a Description for an Interface
You can add a description about an interface to help you remember its function. The description appears
in the output of these privileged EXEC commands: show configuration
, show running-config, and
show interfaces.
Beginning in privileged EXEC mode, follow these steps to add a description for an interface:
Command Purpose
Step 1
configure terminal Enter global configuration mode
Step 2
interface interface-id Specify the physical interface to be configured, and enter interface
configuration mode.
Step 3
no shutdown Enable the port, if necessary. By default, UNIs and ENIs are disabled, and
NNIs are enabled.
Step 4
speed auto Configure the interface to autonegotiate speed with the connected device.
Step 5
duplex auto Configure the interface to autonegotiate duplex mode with the connected
device.
Step 6
mdix auto Enable auto-MDIX on the interface.
Step 7
end Return to privileged EXEC mode.
Step 8
show controllers ethernet-controller
interface-id phy
Verify the operational state of the auto-MDIX feature on the interface.
Step 9
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Specify the interface for which you are adding a description, and enter
interface configuration mode.
Step 3
description string Add a description (up to 240 characters) for an interface.
Step 4
end Return to privileged EXEC mode.
