Cisco Catalyst 4500 Series Command Reference Guide

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
unidirectional
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.
unidirectional {receive-only | send-only}
no unidirectional {receive-only | send-only}
Syntax Description
Defaults Disabled
Command Modes Interface configuration mode
Command History
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
receive-only Specifies the unidirectional reception.
send-only Specifies the unidirectional transmission.
Release Modification
12.1(13)EW Support for this command was introduced on the Catalyst 4500 series switch.
Command Description
show interfaces switchport Displays the administrative and operational status of a switching
(nonrouting) port.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E