Cisco Catalyst 4500 Series Configuration Manual page 1204

udld (interface configuration mode)
The disable keyword is supported on fiber-optic ports only. Use the no form of the udld command to
reset UDLD to the value specified by the
If the port changes from fiber-optic to nonfiber-optic or vice versa, all configurations are maintained.
Examples
The following example shows how to enable UDLD on any port interface for any global
configuration mode)
Switch (config-if)# udld port
Switch (config-if)#
The following example shows how to enable UDLD in aggressive mode on any port interface for any
global udld (enable or aggressive) setting:
Switch (config-if)# udld port aggressive
Switch (config-if)#
The following example shows how to disable UDLD on a fiber port interface for any global
configuration mode)
Switch (config-if)# udld disable
Switch (config-if)#
The following example shows how to enable Fast UDLD on a port interface with a timer value of 200
ms. To enable Fast UDLD on a port, you must first enable UDLD in normal or aggressive mode:
Switch (config-if)# udld port
Switch (config-if)# udld fast-hello 200
Switch (config-if)#
Related Commands Command
show udld
udld (global configuration
mode)
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release XE 3.9.xE and 15.2(5)Ex
2-1154
udld (global configuration mode)
setting:
setting:
Description
Displays the administrative and operational UDLD and Fast
UDLD status.
Enables aggressive or normal mode in the UDLD protocol and sets
the configurable message timer time.
Chapter 2
command.
udld (global
udld (global