Configuring MST region parameters
![[CAUTION: ]](images/caution.png) | CAUTION: Changing MST region settings causes spanning tree recalculation. Make sure you understand the impact on your network before you activate the MST region settings. | |
SPBM runs on MSTI 4092. For two SPBM neighbors to establish an adjacency, you must activate MSTI 4092 on both neighbors and make sure their in-between link has connectivity. To forward traffic on the link, you must also configure the same MST region parameters on the devices, including:
Format selector. The value for this parameter is fixed at 0.
Region name.
Revision level.
VLAN-to-MSTI mapping table.
For more information about MST region configuration commands, see spanning tree commands in Layer 2—LAN Switching Command Reference.
To configure MST region parameters on a BEB or BCB:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter MST region view. | stp region-configuration | N/A |
3. Configure the MST region name. | region-name name | The default MST region name is the MAC address of the device. |
4. Set the MSTP revision level. | revision-level level | The default MSTP revision level is 0. |
5. Map B-VLANs to MSTI 4092. | instance instance-id vlan vlan-id-list | By default, all VLANs are mapped to the CIST (MSTI 0). The value for the instance-id argument must be 4092. |
6. Activate the MST region configuration. | active region-configuration | N/A |