Configuring an MST Region
Context
An MST region contains multiple directly connected switching devices and network segments between these devices. These switching devices run MSTP and have the same MST region name, VLAN-to-MSTI mapping table, and MSTP revision level. One switching network can have multiple MST regions. You can group multiple switching devices into one MST region using MSTP commands.
MST region name
VLAN-to-MSTI mapping
Revision level of the MST region
Perform the following steps on a switching device that needs to join an MST region.
Procedure
- Configure the name of an MST region.
- Configure the mapping between MSTIs and VLANs.
You can configure the mapping between MSTIs and VLANs in the MST region view and VLAN instance view.
Configure the mapping between an MSTI and VLANs in the MST region view.
- Run instance instance-id vlan { vlan-id1 [ to vlan-id2 ] }&<1-10>
The mapping between the MSTI and VLANs is configured.
By default, all VLANs in an MST region are mapped to MSTI 0.
A VLAN can be mapped to only one MSTI. If you map a VLAN that has already been mapped to an MSTI to another MSTI, the original mapping will be deleted.
Configure the mapping between an MSTI and VLANs in the VLAN instance view.
- Run instance instance-id vlan { vlan-id1 [ to vlan-id2 ] }&<1-10>
The mapping between VLANs and an MSTI is configured.
By default, all VLANs in the VLAN instance view are mapped to MSTI 0.
The vlan instance and stp region-configuration commands cannot be used together. If the mappings between VLANs and MSTIs have been configured by the stp region-configuration command, you must delete the configured mapping before using the vlan instance command.
- Run commit
The configuration is committed.
If a VLANIF interface is bound to a VSI, the VLAN corresponding to the VLANIF interface cannot be associated with a non-0 MSTI.
- Run instance instance-id vlan { vlan-id1 [ to vlan-id2 ] }&<1-10>
- (Optional) Configure the revision level of the MST region.