Cisco Nexus 5500 Series Command Reference Manual page 222

speed (interface)
This example shows how to set the an interface port to automatically negotiate the speed:
switch# configure terminal
switch(config)# interface ethernet 1/5
switch(config-if)# speed auto
switch(config-if)#
Related Commands Command
show interface
Cisco Nexus 5500 Series NX-OS Layer 2 Interfaces Command Reference
1216
Description
Displays the interface configuration information.
Chapter S Commands
OL-27880-02