Debug Spanning-Tree - Cisco Catalyst 3650 Command Reference Manual

Layer 2/3 Commands

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
all
backbonefast
bpdu
bpdu-opt
config
etherchannel
events
exceptions
general
ha
mstp
pvst+
root
snmp
switch
OL-32639-01
Displays all spanning-tree debug messages.
Displays BackboneFast-event debug messages.
Displays spanning-tree bridge protocol data unit (BPDU)
debug messages.
Displays optimized BPDU handling debug messages.
Displays spanning-tree configuration change debug
messages.
Displays EtherChannel-support debug messages.
Displays spanning-tree topology event debug messages.
Displays spanning-tree exception debug messages.
Displays general spanning-tree activity debug messages.
Displays high-availability spanning-tree debug messages.
Debugs Multiple Spanning Tree Protocol (MSTP) events.
Displays per-VLAN spanning-tree plus (PVST+) event
debug messages.
Displays spanning-tree root-event debug messages.
Displays spanning-tree Simple Network Management
Protocol (SNMP) handling debug messages.
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.
Layer 2/3 Command Reference, Cisco IOS XE Release 3.6E (Catalyst 3650 Switch)

debug spanning-tree

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