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Cisco Catalyst Blade Switch 3120 for HP Command Reference
OL-12248-01
Chapter 2 Cisco Catalyst Blade Switch 3120 for HP Cisco IOS Commands
mdix auto
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.
mdix auto
no mdix auto
Syntax Description This command has no arguments or keywords.
Defaults 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
interfaces.
Examples 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.
Release Modification
12.2(40)EX This command was introduced.
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