- Index
- Preface
- Product Overview
- Command-Line Interfaces
- Configuring the Switch for the First Time
- Administering the Switch
- Configuring Interfaces
- Checking Port Status and Connectivity
- Configuring Supervisor Engine Redundancy Using RPR and SSO
- Configuring NSF with SSO Supervisor Engine Redundancy
- Configuring In Service Software Upgrade Process
- Configuring Control Plane Policing
- Environmental Monitoring and Power Management
- Configuring Power over Ethernet
- Configuring Switches with Cisco Network Assistant
- Configuring VLANs, VTP, and VMPS
- Configuring IP Unnumbered Interface
- Configuring Layer 2 Ethernet Interfaces
- Configuring SmartPort Macros
- Configuring STP and MST
- Configuring Optional STP Features
- Configuring EtherChannel
- Configuring IGMP Snooping and Filtering
- Configuring 802.1Q and Layer 2 Protocol Tunneling
- Configuring CDP
- Configuring UDLD
- Configuring Unidirectional Ethernet
- Configuring Layer 3 Interfaces
- Configuring Cisco Express Forwarding
- Configuring IP Multicast
- Configuring Policy-Based Routing
- Configuring VRF-lite
- Configuring QoS
- Configuring Voice Interfaces
- Configuring 802.1X Port-Based Authentication
- Configuring Port Security
- Configuring DHCP Snooping and IP Source Guard
- Configuring Dynamic ARP Inspection
- Configuring the AGM for the First Time
- Configuring Network Security with ACLs
- Configuring Private VLANs
- Configuring Port Unicast and Multicast Flood Blocking
- Configuring Port-Based Traffic Control
- Configuring SPAN and RSPAN
- Configuring System Message Logging
- Configuring SNMP
- Configuring NetFlow
- Configuring RMON
- Performing Diagnostics on the Catalyst 4500 Series Switch
- Configuring WCCPv2 Services
- Configuring MIB Support
- ROM Monitor
- Acronyms
Configuring Unidirectional Ethernet
This chapter describes how to configure Unidirectional Ethernet on the Catalyst 4500 series switch and contains these sections:
•Overview of Unidirectional Ethernet
•Configuring Unidirectional Ethernet
Note For complete syntax and usage information for the switch commands used in this chapter, refer to the Catalyst 4500 Series Switch Cisco IOS Command Reference and related publications at this location:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/index.htm.
Overview of Unidirectional Ethernet
You can set stubless Gigabit Ethernet ports to unidirectionally transmit or receive traffic. Unidirectional Ethernet uses only one strand of fiber for either transmitting or receiving one-way traffic for the GigaPort, instead of two strands of fiber for a full-duplex GigaPort Ethernet. Configuring your GigaPorts either to transmit or receive traffic effectively doubles the amount of traffic capabilities for applications, such as video streaming, where most traffic is sent as unacknowledged unidirectional video broadcast streams.
Configuring Unidirectional Ethernet
Note You must configure Unidirectional Ethernet on the non-blocking GigaPort, which will automatically disable UDLD on the port.
To enable Unidirectional Ethernet, perform this task:
This example shows how to set Gigabit Ethernet interface 1/1 to unidirectionally send traffic:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# interface gigabitethernet 1/1
Switch(config-if)# unidirectional send-only
Switch(config-if)# end
Warning!
Enable l2 port unidirectional mode will automatically disable port udld.
You must manually ensure that the unidirectional link does not create
a spanning tree loop in the network.
Enable l3 port unidirectional mode will automatically disable ip routing
on the port. You must manually configure static ip route and arp entry
in order to route ip traffic.
This example shows how to set Gigabit Ethernet interface 1/1 to receive traffic unidirectionally:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# interface gigabitethernet 1/1
Switch(config-if)# unidrectional receive-only
Switch(config-if)# end
Warning!
Enable l2 port unidirectional mode will automatically disable port udld.
You must manually ensure that the unidirectional link does not create
a spanning tree loop in the network.
Enable l3 port unidirectional mode will automatically disable ip routing
on the port. You must manually configure static ip route and arp entry
in order to route ip traffic.
This example shows how to verify the configuration
Switch>show interface gigabitethernet 1/1 unidirectional
show interface gigabitethernet 1/1 unidirectional
Unidirectional configuration mode: send only
CDP neighbour unidirectional configuration mode: receive only
This example shows how to disable Unidirectional Ethernet on Gigabit Ethernet interface 1/1:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# interface gigabitethernet 1/1
Switch(config-if)# no unidirectional
Switch(config-if)# end
This example shows the result of issuing the show interface command for a port that does not support Unidirectional Ethernet:
Switch#show interface f6/1 unidirectional
Unidirectional Ethernet is not supported on FastEthernet6/1