Cisco Catalyst 3650 - Debug Spanning-Tree

debug spanning-tree
To enable debugging of spanning-tree activities, use the debug spanning-tree command in EXEC mode. To
disable debugging, use the no form of this command.
debug spanning-tree {all | backbonefast | bpdu | bpdu-opt | config | etherchannel | events | exceptions |
general | ha | mstp | pvst+| root | snmp | synchronization | switch | uplinkfast}
no debug spanning-tree {all | backbonefast | bpdu | bpdu-opt | config | etherchannel | events | exceptions
| general | mstp | pvst+| root | snmp | synchronization | switch | uplinkfast}
Syntax Description
Displays all spanning-tree debug messages.all
Displays BackboneFast-event debug messages.backbonefast
Displays spanning-tree bridge protocol data unit (BPDU)
debug messages.
bpdu
Displays optimized BPDU handling debug messages.bpdu-opt
Displays spanning-tree configuration change debug
messages.
config
Displays EtherChannel-support debug messages.etherchannel
Displays spanning-tree topology event debug messages.events
Displays spanning-tree exception debug messages.exceptions
Displays general spanning-tree activity debug messages.general
Displays high-availability spanning-tree debug messages.ha
Debugs Multiple Spanning Tree Protocol (MSTP) events.mstp
Displays per-VLAN spanning-tree plus (PVST+) event
debug messages.
pvst+
Displays spanning-tree root-event debug messages.root
Displays spanning-tree Simple Network Management
Protocol (SNMP) handling debug messages.
snmp
Displays switch shim command debug messages. This
shim is the software module that is the interface between
the generic Spanning Tree Protocol (STP) code and the
platform-specific code of various switch platforms.
switch
Layer 2/3 Command Reference, Cisco IOS XE Release 3.6E (Catalyst 3650 Switch)
OL-32639-01 37
Layer 2/3 Commands
debug spanning-tree