Operation Manual – MSTPH3C S7500 Series Ethernet Switches Chapter 1 MSTP Configuration1-10Note:Switches belong to the same MST region only when they have the same MST regionname, VLAN mapping table, and MSTP revision level.II. Configuration example# Configure an MST region, with the name being “info”, the MSTP revision level beinglevel 1, VLAN 2 through VLAN 10 being mapped to MSTI 1, and VLAN 20 throughVLAN 30 being mapped to MSTI 2. system-view[H3C] stp region-configuration[H3C-mst-region] region-name info[H3C-mst-region] instance 1 vlan 2 to 10[H3C-mst-region] instance 2 vlan 20 to 30[H3C-mst-region] revision-level 1[H3C-mst-region] active region-configuration# Verify the above configuration.[H3C-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 301.2.3 Root Bridge/Secondary Root Bridge ConfigurationMSTP can automatically choose a switch as a root bridge. You can also manuallyspecify the current switch as a root bridge by using the corresponding commands.I. Root bridge configurationFollow these steps to specify the current switch as the root bridge of a specified MSTI: