1-11 MSTP Configuration CommandsMSTP Configuration Commandsactive region-configurationSyntaxactive region-configurationViewMST region viewParametersNoneDescriptionUse the active region-configuration command to activate the settings of a multiple spanning tree(MST) region.Configuring MST region-related parameters (especially the VLAN-to-instance mapping table) can resultin network topology jitter. To reduce network topology jitter caused by such a configuration change,multiple spanning tree protocol (MSTP) does not recalculate spanning trees immediately after theconfiguration change; it does this only after you activate the new MST region-related settings or enableMSTP; only then will the new settings begin to take effect.When you carry out this command, MSTP will replace the currently running MST region–relatedparameters with the parameters you have just configured and will perform spanning tree recalculation.Related commands: instance, region-name, revision-level, vlan-mapping modulo, checkregion-configuration.Examples# Activate the MST region-related settings. system-viewSystem View: return to User View with Ctrl+Z.[Sysname] stp region-configuration[Sysname-mst-region] active region-configurationcheck region-configurationSyntaxcheck region-configurationViewMST region view
