14.
Multiple Spanning Tree Protocol (MSTP)
MN700004 Rev 01
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An example of the debug output is:
tMstPIM: 1970/01/01 03:43:59 : Root port is now 1/1/11
For more information about the debug commands see "
Debug Commands for Troubleshooting
Network Problems
".
Table 14-12 MSTP Debug Commands
C o m m a n d D e s c r i p t i o n
debug mstp flush
Displays the flushing (clearing) of the MAC address table when
topology changes have occurred.
debug mstp roles
Displays logs of the port roles.
debug mstp handshake
Displays port handshaking logs.
debug mstp pim
Displays logs of the port information state machine.
debug mstp prt
Displays logs of the port role transition state machine.
debug mstp tcmdebug
mstp bpdu
Displays logs of the topology change state machine.Displays logs for
thereceived and transmitted BPDUs.
no debug mstp
Disables all debug actions in the MSTP.
show debug mstp
Displays the status of the current debug actions in the MSTP.
Debugging the MSTP Flushing of MAC Address Table
The
debug mstp flush
command, in Privileged (Enable) mode, activates the MAC address
table flush debugging in the Multiple Spanning Tree Protocol (MSTP). Use the
no
form of
this command to disable the display of MAC address table flush debugging.
The
debug mstp flush
command will not be saved after reload.
By default, MSTP flush debugging is disabled.
Command Syntax
device-name
#
debug mstp flush
device-name
#
no
debug mstp flush
Example
device-name
#
debug mstp flush
tMstPRT: 1970/01/01 01:18:33 : MSTP Flushing MSTID 1 port AG03
Debugging the MSTP Port Roles
The
debug mstp roles
command, in Privileged (Enable) mode, displays logs of the port roles
in the Multiple Spanning Tree Protocol (MSTP). Use the
no
form of this command to disable
the port roles debugging.
The
debug mstp roles
command will not be saved after reload.