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Cisco Catalyst Blade Switch 3130 for Dell Software Configuration Guide
OL-13270-01
Chapter10 Configuring Interface Characteristics
Configuring Layer 3 Interfaces
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 gigabitethernet1/0/1
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 re member its f unctio n. The desc ription ap pears
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:
Use the no description interface configuration command to delete the description.
This example shows how to add a description on a port and how to verify the de scrip tio n:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# interface gigabitethernet1/0/2
Switch(config-if)# description Connects to Marketing
Switch(config-if)# end
Switch# show interfaces gigabitethernet1/0/2 description
Interface Status Protocol Description
Gi1/0/2 admin down down Connects to Marketing
Configuring Layer 3 Interfaces
The switch supports these types of Layer 3 interfaces:
SVIs: You should configure SVIs for any VLANs for which you want to route traffic. SVIs are
created when you enter a VLAN ID following the interface vlan global configuration command. To
delete an SVI, use the no interface vlan global configuration command. You cannot delete interface
VLAN 1.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Specify the interface for which you are adding a description, an d ente r
interface configuration mode.
Step3 description string Add a description (up to 240 characters) for an interface.
Step4 end Return to privileged EXEC mode.
Step5 show interfaces interface-id description
or
show running-config
Verify your entry.
Step6 copy running-config startup-config (Optional) Save your entries in the configuration file.