speed (Ethernet)

To configure the transmit and receive speed for an Ethernet interface, use the speed command. To reset to the default speed, use the no form of this command.

speed {1000 | 10000}

no speed

Syntax Description


Sets the interface speed to 1 Gbps.


Sets the interface speed to 10 Gbps. This is the default speed.

Command Default

The default speed is 10000 (10-Gigabit).

Command Modes

Interface configuration mode

Command History



This command was introduced.

Usage Guidelines

The first 8 ports of a Nexus 5010 switch and the first 16 ports of a Nexus 5020 switch are switchable 1-Gigabit and 10-Gigabit ports. The default interface speed is 10-Gigabit. To configure these ports for 1-Gigabit Ethernet, insert a 1-Gigabit Ethernet SFP transceiver into the applicable port and then set its speed with the speed command.

Note If the interface and transceiver speed is mismatched, the SFP validation failed message is displayed when you enter the show interface ethernet slot/port command. For example, if you insert a 1-Gigabit SFP transceiver into a port without configuring the speed 1000 command, you will get this error.

By default, all ports on a Cisco Nexus 5000 Series switch are 10 Gigabits.


This example shows how to set the speed for a 1-Gigabit Ethernet port:

switch# configure terminal 
switch(config)# interface ethernet 2/1 
switch(config-if)# speed 1000 

Related Commands


show interface

Displays the interface configuration information.