B-92Cisco Catalyst Blade Switch 3130 and 3032 for Dell Command ReferenceOL-13271-03Appendix B Cisco Catalyst Blade Switch 3130 and 3032 for Dell Debug Commandsdebug udlddebug udldUse the debug udld privileged EXEC command to enable debugging of the UniDirectional LinkDetection (UDLD) feature. Use the no form of this command to disable UDLD debugging.debug udld {events | packets | registries}no debug udld {events | packets | registries}Syntax DescriptionDefaults Debugging is disabled.Command Modes Privileged EXECCommand HistoryUsage Guidelines The undebug udld command is the same as the no debug udld command.On a stacking-capable switch, when you enable debugging, it is enabled only on the stack master. Toenable debugging on a stack member, you can start a session from the stack master by using the sessionswitch-number privileged EXEC command. Then enter the debug command at the command-lineprompt of the stack member. You also can use the remote command stack-member-number LINEprivileged EXEC command on the stack master switch to enable debugging on a member switch withoutfirst starting a session.For debug udld events, these debugging messages appear:• General UDLD program logic flow• State machine state changes• Program actions for the set and clear ErrDisable state• Neighbor cache additions and deletions• Processing of configuration commands• Processing of link-up and link-down indicationsevents Display debug messages for UDLD process events as they occur.packets Display debug messages for the UDLD process as it receives packets from thepacket queue and tries to send them at the request of the UDLD protocol code.registries Display debug messages for the UDLD process as it processes registry calls fromthe UDLD process-dependent module and other feature modules.Release Modification12.2(40)EX1 This command was introduced.
