Cisco IE-3000-8TC Command Reference Manual page 753

Appendix B IE 3000 Switch Debug Commands
For debug udld registries, these categories of debugging messages appear:
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Related Commands Command
show debugging
show udld
OL-13019-01
Sub-block creation
Fiber-port status changes
State change indications from the port manager software
MAC address registry calls
Description
Displays information about the types of debugging that are enabled.
Displays UDLD administrative and operational status for all ports or the
specified port.
Cisco IE 3000 Switch Command Reference
debug udld
B-75