Debug Udld - Cisco Catalyst 4500 Series Configuration Manual

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches

debug udld

To enable the debugging of UDLD activity, use the debug udld command. To disable the debugging
output, use the no form of this command.
Syntax Description
events
packets
registries
Command Default This command has no default settings.
Command Modes Privileged EXEC mode
Command History Release
12.1(8a)EW
Usage Guidelines This command is supportedonly on the supervisor engine and enterable only from the switch console.
Examples The following example shows how to debug the UDLD events:
Switch# debug udld events
UDLD events debugging is on
Switch#
The following example shows how to debug the UDLD packets:
Switch# debug udld packets
UDLD packets debugging is on
Switch#
The following example shows how to debug the UDLD registry events:
Switch# debug udld registries
UDLD registries debugging is on
Switch#
debug udld {events | packets | registries}
no debug udld {events | packets | registries}
Enables the debugging of UDLD process events as they occur.
Enables the debugging of the UDLD process as it receives packets from the packet queue
and attempts to transmit packets at the request of the UDLD protocol code.
Enables the debugging of the UDLD process as it processes registry upcalls from the
UDLD process-dependent module and other feature modules.
Modification
This command was introduced on the Catalyst 4500 series switch.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release XE 3.9.xE and 15.2(5)Ex
debug udld
2-189