Operation Manual – MSTPH3C S7500E Series Ethernet Switches Chapter 1 MSTP Configuration1-21II. Configuration example# Configure the MST region name to be “info”, the MSTP revision level to be 1, andVLAN 2 through VLAN 10 to be mapped to instance 1 and VLAN 20 through VLAN 30to instance 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-configuration1.3.2 Specifying the Root Bridge or a Secondary Root BridgeMSTP can determine the root bridge of a spanning tree through MSTP calculation.Alternatively, you can specify the current device as the root bridge using the commandsprovided by the system.I. Specifying the current device as the root bridge of a specific spanning treeFollow these steps to specify the current device as the root bridge of a specificspanning tree:To do... Use the command... RemarksEnter system view system-view —Specify the currentdevice as the rootbridge of a specificspanning treestp [ instance instance-id ] rootprimary [ bridge-diameterbridge-number ] [ hello-timecenti-seconds ]RequiredBy default, a devicedoes not function asthe root bridge.II. Specifying the current device as a secondary root bridge of a specificspanning treeFollow these steps to specify the current device as a secondary root bridge of a specificspanning tree:To do... Use the command... RemarksEnter system view system-view —Specify the current deviceas a secondary rootbridge of a specificspanning treestp [ instance instance-id ]root secondary[ bridge-diameterbridge-number ] [ hello-timecenti-seconds ]RequiredBy default, a devicedoes not function as asecondary root bridge.
