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Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
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Chapter 28 Configuring UDLD
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 and all members
in the switch stack:
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.
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
udld
{
aggressive
|
enable | message time
message-timer-interval
}
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 28-1
•
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 1 to 90 seconds.
Note
The global UDLD setting is automatically applied to switches
that join the switch stack.
Note
This command affects fiber-optic ports only. Use the
udld
interface configuration command to enable UDLD on other port
types. For more information, see the
Interface” section on page 28-6
Step 3
end
Return to privileged EXEC mode.
Step 4
show udld
Verify your entries.
Step 5
copy running-config startup-config
(Optional) Save your entries in the configuration file.
