Unidirectional - Cisco Catalyst 4500 Series Command Reference Manual

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches

unidirectional

To configure the nonblocking Gigabit Ethernet ports to unidirectionally send or receive traffic on an
interface, use the unidirectional command. To disable unidirectional communication, use the no form
of this command.
Syntax Description
receive-only
send-only
Defaults Disabled
Command Modes Interface configuration mode
Command History Release
12.1(13)EW
Usage Guidelines Enabling port unidirectional mode automatically disables port UDLD. You must manually ensure that
the unidirectional link does not create a spanning-tree loop in the network.
Examples This example shows how to set Gigabit Ethernet interface 1/1 to receive traffic unidirectionally:
Switch# config terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# interface gigabitethernet 1/1
Switch(config-if)# unidirectional receive-only
Switch(config-if)# end
Switch#
Related Commands Command
show interfaces switchport
OL-27596 -01
unidirectional {receive-only | send-only}
no unidirectional {receive-only | send-only}
Specifies the unidirectional reception.
Specifies the unidirectional transmission.
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
Description
Displays the administrative and operational status of a switching
(nonrouting) port.
unidirectional
2-1103