Operation Manual – MSTPH3C S5100-SI/EI Series Ethernet Switches Chapter 1 MSTP Configuration1-21Note:z MSTP-enabled switches are in the same region only when they have the sameformat selector (a 802.1s-defined protocol selector, which is 0 by default and cannotbe configured), MST region name, VLAN-to-MSTI mapping table, and revision level.z The H3C series support only the MST region name, VLAN-to-MSTI mapping table,and revision level. Switches with the settings of these parameters being the sameare assigned to the same MST region.II. Configuration example# Configure an MST region named info, the MSTP revision level being level 1, VLAN 2through VLAN 10 being mapped to MSTI 1, and VLAN 20 through VLAN 30 beingmapped to MSTI 2. system-view[Sysname] stp region-configuration[Sysname-mst-region] region-name info[Sysname-mst-region] instance 1 vlan 2 to 10[Sysname-mst-region] instance 2 vlan 20 to 30[Sysname-mst-region] revision-level 1[Sysname-mst-region] active region-configuration# Verify the above configuration.[Sysname-mst-region] check region-configurationAdmin configurationFormat selector :0Region name :infoRevision level :1Instance Vlans Mapped0 1, 11 to 19, 31 to 40941 2 to 102 20 to 301.3.3 Specifying the Current Switch as a Root Bridge/Secondary Root BridgeMSTP can automatically choose a switch as a root bridge through calculation. You canalso manually specify the current switch as a root bridge by using the correspondingcommands.I. Specify the current switch as the root bridge of a spanning treeFollow these steps to specify the current switch as the root bridge of a spanning tree:
