mac

Commands for MSTP
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17.2 Commands for Monitor and Debug
17.2.1 debug spanning-tree
Command: debug spanning-tree
no debug spanning-tree
Function: Enable the MSTP debugging information; the command “no debug
spanning-tree” disables the MSTP debugging information.
Command mode: Admin Mode
Usage Guide: This command is the general switch for all the MSTP debugging. Users
should enable the detailed debugging information, and then they can use this command
to display the relevant debugging information. In general, this command is used by
skilled technicians.
Example: Enable to receive the debugging information of BPDU messages on the
port1/1.
Switch#debug spanning-tree
Switch#debug spanning-tree bpdu rx interface e1/1
17.2.2 show mst-pending
Command: show mst-pending
Function: In the MSTP region mode, display the configuration of the current MSTP
region.
Command mode: Admin Mode
Usage Guide: In the MSTP region mode, display the configuration of the current MSTP
region such as MSTP name, revision, VLAN and instance mapping.
Note: Before quitting the MSTP region mode, the displayed parameters may not be
effective.
Example: Display the configuration of the current MSTP region.
Switch(config)#spanning-tree mst configuration
Switch(Config-Mstp-Region)#show mst-pending
Name switch
Revision 0
Instance Vlans Mapped
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00 1-29, 31-39, 41-4093