Specifications

B-7
Catalyst 2950 and Catalyst 2955 Switch Command Reference
78-15304-01
Chapter B Debug Commands
debug pm
debug pm
Use the debug pm privileged EXEC command to debug port manager (PM) activity. The port manager
is a state machine that controls all the logical and physical interfaces. All features, such as VLANs and
UniDirectional Link Detection (UDLD), work with the port manager to provide switch functions. Use
the no form of this command to disable debugging output.
debug pm {all | assert | card | cookies | etherchnl | messages | port | registry | sm | span | split |
vlan | vp}
no debug pm {all | assert | card | cookies | etherchnl | messages | port | registry | sm | span | split |
vlan | vp}
Syntax Description
Note Though visible in the command-line help strings, the scp and pvlan keywords are not supported.
Defaults Debugging is disabled.
Command Modes Privileged EXEC
Command History
Usage Guidelines The undebug pm command is the same as the no debug pm command.
all Display all PM debugging messages.
assert Debug assert messages.
card Debug line-card related events.
cookies Enable internal PM cookie validation.
etherchnl Debug EtherChannel-related events.
messages Debug PM messages.
port Debug port-related events.
registry Debug PM registry invocations.
sm Debug state-machine related events.
span Debug spanning-tree related events.
split Debug split-processor.
vlan Debug VLAN-related events.
vp Debug virtual-port related events.
Release Modification
12.1(6)EA2 This command was first introduced.