Cisco Catalyst 2960 Command Reference Manual page 125

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Catalyst 2960 Switch Cisco IOS Commands

If the speed is set to auto, the switch negotiates with the device at the other end of the link for the speed

setting and then forces the speed setting to the negotiated value. The duplex setting remains as

configured on each end of the link, which could result in a duplex setting mismatch.

You can configure the duplex setting when the speed is set to auto.

Changing the interface speed and duplex mode configuration might shut down and re-enable the

interface during the reconfiguration.

For guidelines on setting the switch speed and duplex parameters, see the "Configuring Interface

Characteristics" chapter in the software configuration guide for this release.

This example shows how to configure an interface for full-duplex operation:

Switch(config)# interface gigabitethernet0/1

Switch(config-if)# duplex full

You can verify your setting by entering the show interfaces privileged EXEC command.

Related Commands

show interfaces

Displays the interface settings on the switch.

Sets the speed on a 10/100 or 10/100/1000 Mb/s interface.

Catalyst 2960 Switch Command Reference