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D Commands

duplex

To specify the duplex mode as full, half, or autonegotiate, use the duplex command. To return the system to

default mode, use the no form of this command.

duplex {full| half| auto}

no duplex {full| half| auto}

Syntax Description

full

half

auto

Command Default

None

Command Modes

Interface configuration mode

network-adminvdc-admin

Command History

Release

5.1(3)N1(1)

Usage Guidelines

The interface speed that you specify can affect the duplex mode used for an interface, so you should set the

speed before setting the duplex mode. If you set the speed for autonegotiation, the duplex mode is automatically

set to be autonegotiated. If you specify 10- or 100-Mbps speed, the port is automatically configured to use

half-duplex mode, but you can specify full-duplex mode instead. Gigabit Ethernet is full duplex only. You

cannot change the duplex mode on Gigabit Ethernet ports or on a 10/100/1000-Mbps port that is set for Gigabit

Ethernet.

See the Cisco Nexus 5000 Series NX-OS Layer 2 Switching Configuration Guide for more information on

interface speed and duplex settings.

This command does not require a license.

Examples

This example shows how to specify the duplex mode for full duplex:

switch#

configure

terminal switch(config)#

Specifies the duplex mode as full.

Specifies the duplex mode as half.

This keyword is not supported on a

Note

management interface.

Specifies the duplex mode as autonegotiate.

Modification

This command was introduced.

Cisco Nexus 5000 Series Interfaces Command Reference

duplex