Debug Udld - Cisco Catalyst 2950 Command Reference Manual

debug udld

debug udld
Use the debug udld privileged EXEC command to enable debugging of the UniDirectional Link
Detection (UDLD) feature. Use the no form of this command to disable UDLD debugging.
Syntax Description
events
packets
registries
Defaults Debugging is disabled.
Command Modes Privileged EXEC
Command History Release
12.1(6)EA2
Usage Guidelines For debug udld events, these debugging messages appear:
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For debug udld packets, these debugging messages appear:
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Catalyst 2950 and Catalyst 2955 Switch Command Reference
C-28
debug udld {events | packets | registries}
no debug udld {events | packets | registries}
Display debug messages for UDLD process events as they occur.
Display debug messages for the UDLD process as it receives packets from the packet
queue and tries to send them at the request of the UDLD protocol code.
Display debug messages for the UDLD process as it processes registry calls from the
UDLD process-dependent module and other feature modules.
Modification
This command was introduced.
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 indications
General packet processing program flow on receipt of an incoming packet
Indications of the contents of the various pieces of packets received (such as type length versions
[TLVs]) as they are examined by the packet reception code
Packet transmission attempts and the outcome
Appendix C Catalyst 2950 and 2955 Switch Debug Commands
OL-10102-01