Enabling Udld On Individual Interfaces - Cisco Catalyst 4500 series Administration Manual

Configuring UDLD on the Switch

Enabling UDLD on Individual Interfaces

To enable UDLD on individual interfaces, perform this task:
Command
Step 1
Switch(config-if)# udld port
Switch(config-if)# udld port aggressive
Switch(config-if)# udld fast-hello interval
Step 2
Switch# show udld interface
Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)E
32-6
Purpose
Enables UDLD in normal mode on a specific interface.
On a fiber-optic interface, this command overrides the
udld enable global configuration command setting.
Enables UDLD in aggressive mode on a specific
interface. On a fiber-optic interface, this command
overrides the udld enable global configuration command
setting.
Enables Fast UDLD on the interface with message
interval equal to the interval value in milliseconds.
The interval value range is from 200 milliseconds to 1000
milliseconds.
To enable Fast UDLD, UDLD must be enabled
(explicitly configured or globally enabled) and
operational (in bidirectional state) on the interface.
Fast UDLD can only be enabled on individual
Note
interfaces (a global enable command does not
exist).
Fast UDLD can only be configured or enabled on
Note
a limited number of interfaces that depend on the
type of supervisor installed. The number of
supported interfaces for Fast UDLD can be
displayed with the show udld fast-hello
command.
Verifies the configuration.
Chapter 32 Configuring UDLD
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