Enabling Udld Globally; Enabling Udld On An Interface - Cisco WS-C2960-24LC-S Software Configuration Manual

Chapter 22 Configuring UDLD

Enabling UDLD Globally

Beginning in privileged EXEC mode, follow these steps to enable UDLD in the aggressive or normal
mode and to set the configurable message timer on all fiber-optic ports on the switch:
Command
Step 1 configure terminal
Step 2 udld {aggressive | enable | message time
message-timer-interval}
Step 3 end
Step 4 show udld
Step 5
copy running-config startup-config
To disable UDLD globally, use the no udld enable global configuration command to disable normal
mode UDLD on all fiber-optic ports. Use the no udld aggressive global configuration command to
disable aggressive mode UDLD on all fiber-optic ports.

Enabling UDLD on an Interface

Beginning in privileged EXEC mode, follow these steps either to enable UDLD in the aggressive or
normal mode or to disable UDLD on a port:
Command
Step 1 configure terminal
Step 2 interface interface-id
OL-8603-04
Purpose
Enter global configuration mode.
Specify the UDLD mode of operation:
• aggressive—Enables UDLD in aggressive mode on all fiber-optic
ports.
enable—Enables UDLD in normal mode on all fiber-optic ports on
•
the switch. UDLD is disabled by default.
An individual interface configuration overrides the setting of the
udld enable global configuration command.
For more information about aggressive and normal modes, see the
"Modes of Operation" section on page
message time message-timer-interval—Configures the period of
•
time between UDLD probe messages on ports that are in the
advertisement phase and are detected to be bidirectional. The range
is from 7 to 90 seconds.
This command affects fiber-optic ports only. Use the udld
Note
interface configuration command to enable UDLD on other port
types. For more information, see the
Interface" section on page
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Specify the port to be enabled for UDLD, and enter interface
configuration mode.
Catalyst 2960 Switch Software Configuration Guide
Configuring UDLD
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"Enabling UDLD on an
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