38 MSTP CONFIGURATION COMMANDSactive region-configurationSyntax active region-configurationView MST region viewParameters NoneDescription Use the active region-configuration command to activate your MST regionconfiguration.When you carry out this command, MSTP will replace the currently running MSTregion-related parameters with the parameters you have just configured, and willperform spanning tree computing again.Related commands: instance, region-name, revision-level, vlan-mapping modulo, and checkregion-configuration.Examples # Activate MST region configuration manually. system-view[Sysname] stp region-configuration[Sysname-mst-region] active region-configurationcheck region-configurationSyntax check region-configurationView MST region viewParameters NoneDescription Use the check region-configuration command to view all the MST regionconfiguration information, including the region name, VLAN-to-instance mappingand revision level settings.Be sure that your MST region configurations are correct, especially theVLAN-to-instance mapping table. MSTP-compliant devices are in the same MSTregion only when they have the same region name, the same VLAN-to-instance