Consolidated Platform Configuration Guide, Cisco Ios Release 15.2(4)E (Catalyst 2960-X Switches - Cisco Catalyst 2960 series Configuration Manual

Command or Action
Step 2
interface interface-id
Example:
Switch(config)# interface
gigabitethernet 1/0/1
Step 3 udld port [aggressive]
Example:
Switch(config-if)# udld port aggressive
Step 4 end
Example:
Switch(config-if)# end
Related Topics
Monitoring and Maintaing UDLD
Aggressive Mode, on page 397
Normal Mode, on page 396
Methods to Detect Unidirectional Links, on page 397
Event-Driven Detection and Echoing, on page 398
UDLD Reset Options, on page 398
Default UDLD Configuration, on page 398
Monitoring and Maintaining UDLD
Command
show udld [interface-id | neighbors]
Purpose
Specifies the port to be enabled for UDLD, and enters interface
configuration mode.
UDLD is disabled by default.
Note
Returns to privileged EXEC mode.

Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)

Monitoring and Maintaining UDLD
• udld port—Enables UDLD in normal mode on the specified
port.
• udld port aggressive—(Optional) Enables UDLD in
aggressive mode on the specified port.
Use the no udld port interface configuration command to
disable UDLD on a specified fiber-optic port.
Purpose
Displays the UDLD status for the specified port or
for all ports.
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