B-78
Cisco Catalyst Blade Switch 3030 Command Reference
78-17262-01
Appendix B Cisco Catalyst Blade Switch 3030 Debug Commands
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.
debug udld
{
events
|
packets
|
registries
}
no debug udld
{
events
|
packets
|
registries
}
Syntax Description
Defaults
Debugging is disabled.
Command Modes
Privileged EXEC
Command History
Usage Guidelines
The
undebug udld
command is the same as the
no debug udld
command.
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 indications
For
debug udld packets
, these debugging messages appear:
•
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
For
debug udld registries
, these categories of debugging messages appear:
•
Sub-block creation
•
Fiber-port status changes
events
Display debug messages for UDLD process events as they occur.
packets
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.
registries
Display debug messages for the UDLD process as it processes registry calls from
the UDLD process-dependent module and other feature modules.
Release
Modification
12.2(25)SEE
This command was introduced.
