170 CHAPTER 13: MSTP CONFIGURATION COMMANDS
Parameter
None
Description
Use the check region-configuration command to view the configuration 
information (including switch region name, revision level, and VLAN mapping 
table) to be activated.
MSTP defines that the user must ensure the correct region configurations, 
especially the VLAN mapping table configuration. The switches can be configured 
in the same region only if their region names, VLAN mapping tables, and MSTP 
revision levels are configured exactly the same. The switch may not be configured 
in the expected region due to any slight deviation. You can use this command to 
display the MST region configuration information to be activated to know to 
which MST regions the switch belongs and check if the MST region configurations 
are correct.
Related command: instance, region-name, revision-level, vlan-mapping 
modulo, active region-configuration.
Example
# Display the configuration information about the region.
<SW8800>system-view 
System View: return to User View with Ctrl+Z. 
[SW8800]stp region-configuration 
[3Com-mst-region] check region-configuration 
Admin. Configuration 
   Format selector :0 
   Region name     :00b010000001 
   Revision level  :0 
 
   Instance   Vlans Mapped 
      0       1 to 9, 11 to 4094 
     16       10 
debugging stp Syntax
debugging stp { global-error | global-event | all | event [ flush | packetdrop | 
port ] | instance instance-id | lacp-key | packet | state-machine [ { pim | prs | 
prt | pst | tcm } [ instance instance-id ] | [ ppm | ptx | tcpm] ] | interface 
interface-type interface-number { lacp-key | packet | event } }
undo debugging stp { global-error | global-event | all | event [ flush | 
packetdrop | port ] | instance instance-id | lacp-key | packet | 
tc-protectionstate-machine [ { pim | prs | prt | pst | tcm } [ instance instance-id 
Tabl e 25   Description on the fields of the check region-configuration command
Field  Description 
Format selector  The selector defined by MSTP 
Region name  Region name of MST region 
Revision level  Revision level of MST region 
Instance Vlans Mapped  VLAN mapping table of MST region