Mdix Auto - Cisco Catalyst 3120 Command Reference Manual

Catalyst blade switch 3120 for hp command reference

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Cisco Catalyst Blade Switch 3120 for HP Cisco IOS Commands

mdix auto

Use the mdix auto interface configuration command on the switch stack or on a standalone switch to

enable the automatic medium-dependent interface crossover (auto-MDIX) feature on the interface.

When auto-MDIX is enabled, the interface automatically detects the required cable connection type

(straight-through or crossover) and configures the connection appropriately. Use the no form of this

command to disable auto-MDIX.

Syntax Description

This command has no arguments or keywords.

Auto-MDIX is enabled.

Command Modes

Interface configuration

Command History

Usage Guidelines

When you enable auto-MDIX on an interface, you must also set the interface speed and duplex to auto

so that the feature operates correctly.

When auto-MDIX (and autonegotiation of speed and duplex) is enabled on one or both of connected

interfaces, link up occurs, even if the cable type (straight-through or crossover) is incorrect.

Auto-MDIX is supported on all 10/100 and 10/100/1000 Mb/s interfaces and on 10/100/1000BASE-TX

small form-factor pluggable (SFP) module interfaces. It is not supported on 1000BASE-SX SFP module

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

You can verify the operational state of auto-MDIX on the interface by entering the show controllers

ethernet-controller interface-id phy privileged EXEC command.

no mdix auto

Modification

This command was introduced.

Cisco Catalyst Blade Switch 3120 for HP Command Reference