Unidirectional - Cisco 4500M Command Reference Manual

Chapter2 Cisco IOS Commands for the Catalyst 4500 Series Switches

unidirectional

To configure 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
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 interface1/1 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
show interfaces switchport
78-16201-01
unidirectional {receive-only | send-only}
no unidirectional {receive-only | send-only }
Specifies unidirectional reception.
Specifies unidirectional transmission.
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW
unidirectional
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