Enabling Udld Globally; Enabling Udld On An Interface - Cisco 2950G 24 - Catalyst Switch Software Configuration Manual
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Configuring UDLD
Enabling UDLD Globally
Beginning in privileged EXEC mode, follow these steps to enable UDLD in the aggressive or the normal
mode and to set the configurable message timer on all fiber-optic interfaces 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 to enable UDLD in the aggressive or normal
mode on an interface:
Command
Step 1
configure terminal
Step 2
interface interface-id
Catalyst 2950 Desktop Switch Software Configuration Guide
19-4
Purpose
Enter global configuration mode.
Specify the UDLD mode of operation:
•
aggressive—Enables UDLD in aggressive mode on all fiber-optic
interfaces. For details on the usage guidelines for the aggressive
mode, refer to the command reference guide.
•
enable—Enables UDLD in normal mode on all fiber-optic
interfaces on the switch. UDLD is disabled by default.
An individual interface configuration overrides the setting of the
udld enable global configuration command.
•
message time message-timer-interval—Configures the period of
time between UDLD probe messages on ports that are in the
advertisement phase and are determined to be bidirectional. The
range is from 7 to 90 seconds.
This command only affects fiber-optic interfaces. Use the udld
Note
interface configuration command to enable UDLD on other
interface types. For more information, see the
on an 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.
Enter interface configuration mode, and specify the interface to be
enabled for UDLD.
Chapter 19
Configuring UDLD
"Enabling UDLD
19-4.
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