Filter
Top Products
9-4
Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
OL-16506-17
Chapter 9 UniDirectional Link Detection (UDLD) Protocol
How to Configure the UDLD Protocol
• Enabling UDLD on Individual LAN Interfaces, page 9-4
• Disabling UDLD on Fiber-Optic LAN Interfaces, page 9-6
• Configuring the UDLD Probe Message Interval, page 9-7
• Resetting the Disabled LAN Interfaces Manually, page 9-8
• Resetting the Disabled LAN Interfaces Automatically, page 9-8
• Debugging UDLD, page 9-9
Enabling UDLD Globally
To globally enable the UDLD on all fiber-optic LAN ports, perform this task:
SUMMARY STEPS
1. enable
2. configure terminal
3. udld {enable | aggressive}
DETAILED STEPS
Enabling UDLD on Individual LAN Interfaces
To enable the UDLD on individual LAN interfaces, perform this task:
SUMMARY STEPS
1. enable
2. configure terminal
Command Purpose
Step 1
enable
Example:
Router# enable
Enables the privileged EXEC mode.
Enter your password, if prompted.
Step 2
configure terminal
Example:
Router# configure terminal
Enters the global configuration mode.
Step 3
udld {enable | aggressive}
no udld {enable | aggressive}
Example:
Router(config)# udld enable
Enables the UDLD globally on fiber-optic LAN ports.
Note This command configures only the fiber-optic
LAN ports. Individual LAN port configuration
overrides the setting of this command.
Use the no form of this command to disable the UDLD
globally on fiber-optic LAN ports.