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Catalyst 2350 Switch Command Reference
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Chapter 2 Catalyst 2350 Switch Cisco IOS Commands
mdix auto
mdix auto
Use the
mdix auto
interface configuration command 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 or -LX SFP
module interfaces.
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
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(46)EY
This command was introduced.