Mdix Auto - Cisco ME 3800X Command Reference Manual

Chapter 2 Cisco ME 3800X and ME 3600X Switch Cisco IOS Commands

mdix auto

To enable the automatic medium-dependent interface crossover (auto-MDIX) feature on the interface,
use the mdix auto command in interface configuration mode. When auto-MDIX is enabled, the interface
automatically detects the required cable connection type (straight-through or crossover) and configures
the connection appropriately. To disable auto-MDIX, use the no form of this command.
Syntax Description This command has no arguments or keywords.
Defaults
Auto-MDIX is enabled.
Command Modes
Interface configuration
Command History Release
12.2(52)EY
Usage Guidelines
When you enable auto-MDIX on an interface, you must also set the speed and duplex on the interface to
auto so that the feature operates correctly.
When auto-MDIX (along with autonegotiation of speed and duplex) is enabled on one or both of
connected interfaces, link up occurs, even if the required cable type (straight-through or crossover) is
not present.
Auto-MDIX is supported on all 10/100-Mbps interfaces and on 10/100/1000BASE-T/BASE-TX small
form-factor pluggable (SFP)-module interfaces. It is not supported on 1000BASE-SX or -LX SFP
module interfaces.
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.
Examples This example shows how to enable auto-MDIX on a port:
Switch# configure terminal
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# speed auto
Switch(config-if)# duplex auto
Switch(config-if)# mdix auto
Switch(config-if)# end
OL-28238-01
mdix auto
no mdix auto
Modification
This command was introduced.
Cisco ME 3800X and ME 3600X Switch Command Reference
mdix auto
2-183